streamline rebased Gson into source; rebase was done to prevent conflict with other plugins (like upcoming WorldGuard release) which also use Gson; Bukkit doesn't yet handle such conflicts properly

src/com/bukkit/mcteam/factions/entities/EM.java

@@ -10,7 +10,7 @@ import org.bukkit.entity.Player;
 import com.bukkit.mcteam.factions.Factions;
 import com.bukkit.mcteam.factions.util.*;
 import com.bukkit.mcteam.util.DiscUtil;
-import com.google.gson.*;
+import com.bukkit.mcteam.gson.*;
 
 /**
  * This is a entity manager that persists object to json.
@@ -125,6 +125,7 @@ public class EM {
 		folderBoard.mkdirs();
 				
 		class jsonFileFilter implements FileFilter {
+			@Override
 			public boolean accept(File file) {
 				return (file.getName().toLowerCase().endsWith(ext) && file.isFile());
 			}
@@ -204,6 +205,7 @@ public class EM {
 		folderFollower.mkdirs();
 				
 		class jsonFileFilter implements FileFilter {
+			@Override
 			public boolean accept(File file) {
 				return (file.getName().toLowerCase().endsWith(ext) && file.isFile());
 			}
@@ -292,6 +294,7 @@ public class EM {
 				
 		class jsonFileFilter implements FileFilter
 		{
+			@Override
 			public boolean accept(File file) {
 				return (file.getName().toLowerCase().endsWith(ext) && file.isFile());
 			}

src/com/bukkit/mcteam/gson/AnonymousAndLocalClassExclusionStrategy.java

@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+
+/**
+ * Strategy for excluding anonymous and local classes.
+ *
+ * @author Joel Leitch
+ */
+final class AnonymousAndLocalClassExclusionStrategy implements ExclusionStrategy {
+
+  public boolean shouldSkipField(FieldAttributes f) {
+    return isAnonymousOrLocal(f.getDeclaredClass());
+  }
+
+  public boolean shouldSkipClass(Class<?> clazz) {
+    return isAnonymousOrLocal(clazz);
+  }
+
+  private boolean isAnonymousOrLocal(Class<?> clazz) {
+    return !Enum.class.isAssignableFrom(clazz)
+        && (clazz.isAnonymousClass() || clazz.isLocalClass());
+  }
+}

src/com/bukkit/mcteam/gson/Cache.java

@@ -0,0 +1,61 @@
+/*
+ * Copyright (C) 2010 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+/**
+ * Defines generic cache interface.
+ * 
+ * @author Inderjeet Singh
+ * @author Joel Leitch
+ */
+interface Cache<K, V> {
+
+  /**
+   * Adds the new value object into the cache for the given key.  If the key already
+   * exists, then this method will override the value for the key.
+   *
+   * @param key the key identifier for the {@code value} object
+   * @param value the value object to store in the cache
+   */
+  void addElement(K key, V value);
+
+  /**
+   * Retrieve the cached value for the given {@code key}.
+   *
+   * @param key the key identifying the value
+   * @return the cached value for the given {@code key}
+   */
+  V getElement(K key);
+  
+  /**
+   * Removes the value from the cache for the given key.
+   * 
+   * @param key the key identifying the value to remove
+   * @return the value for the given {@code key}
+   */
+  V removeElement(K key);
+
+  /**
+   * Removes everything from this cache.
+   */
+  void clear();
+  
+  /**
+   * @return the number of objects in this cache
+   */
+  int size();
+}

src/com/bukkit/mcteam/gson/CamelCaseSeparatorNamingPolicy.java

@@ -0,0 +1,73 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+import java.lang.annotation.Annotation;
+import java.lang.reflect.Type;
+import java.util.Collection;
+
+/**
+ * Converts the field name that uses camel-case define word separation into separate words that
+ * are separated by the provided {@code separatorString}.
+ *
+ * <p>The following is an example:</p>
+ * <pre>
+ * class IntWrapper {
+ *   public int integerField = 0;
+ * }
+ *
+ * CamelCaseSeparatorNamingPolicy policy = new CamelCaseSeparatorNamingPolicy("_");
+ * String translatedFieldName =
+ *     policy.translateName(IntWrapper.class.getField("integerField"));
+ *
+ * assert("integer_Field".equals(translatedFieldName));
+ * </pre>
+ *
+ * @author Joel Leitch
+ */
+final class CamelCaseSeparatorNamingPolicy extends RecursiveFieldNamingPolicy {
+  private final String separatorString;
+
+  /**
+   * Constructs a new CamelCaseSeparatorNamingPolicy object that will add the
+   * {@code separatorString} between each of the words separated by camel case.
+   *
+   * @param separatorString the string value to place between words
+   * @throws IllegalArgumentException thrown if the {@code separatorString} parameter
+   *         is null or empty.
+   */
+  public CamelCaseSeparatorNamingPolicy(String separatorString) {
+    Preconditions.checkNotNull(separatorString);
+    Preconditions.checkArgument(!"".equals(separatorString));
+    this.separatorString = separatorString;
+  }
+
+  @Override
+  protected String translateName(String target, Type fieldType,
+      Collection<Annotation> annnotations) {
+    StringBuilder translation = new StringBuilder();
+    for (int i = 0; i < target.length(); i++) {
+      char character = target.charAt(i);
+      if (Character.isUpperCase(character) && translation.length() != 0) {
+        translation.append(separatorString);
+      }
+      translation.append(character);
+    }
+
+    return translation.toString();
+  }
+}

src/com/bukkit/mcteam/gson/CircularReferenceException.java

@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2009 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+/**
+ * Exception class to indicate a circular reference error.
+ * This class is not part of the public API and hence is not public.
+ *
+ * @author Inderjeet Singh
+ * @author Joel Leitch
+ */
+final class CircularReferenceException extends RuntimeException {
+  private static final long serialVersionUID = 7444343294106513081L;
+  private final Object offendingNode;
+
+  CircularReferenceException(Object offendingNode) {
+    super("circular reference error");
+    this.offendingNode = offendingNode;
+  }
+  
+  public IllegalStateException createDetailedException(FieldAttributes offendingField) {
+    StringBuilder msg = new StringBuilder(getMessage());
+    if (offendingField != null) {
+      msg.append("\n  ").append("Offending field: ").append(offendingField.getName() + "\n");
+    }
+    if (offendingNode != null) {
+      msg.append("\n  ").append("Offending object: ").append(offendingNode);
+    }
+    return new IllegalStateException(msg.toString(), this);
+  }
+}

src/com/bukkit/mcteam/gson/CompositionFieldNamingPolicy.java

@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+import java.lang.annotation.Annotation;
+import java.lang.reflect.Type;
+import java.util.Collection;
+
+/**
+ * Performs numerous field naming translations wrapped up as one object.
+ *
+ * @author Joel Leitch
+ */
+abstract class CompositionFieldNamingPolicy extends RecursiveFieldNamingPolicy {
+
+  private final RecursiveFieldNamingPolicy[] fieldPolicies;
+
+  public CompositionFieldNamingPolicy(RecursiveFieldNamingPolicy... fieldNamingPolicies) {
+    if (fieldNamingPolicies == null) {
+      throw new NullPointerException("naming policies can not be null.");
+    }
+    this.fieldPolicies = fieldNamingPolicies;
+  }
+
+  @Override
+  protected String translateName(String target, Type fieldType, Collection<Annotation> annotations) {
+    for (RecursiveFieldNamingPolicy policy : fieldPolicies) {
+      target = policy.translateName(target, fieldType, annotations);
+    }
+    return target;
+  }
+}

src/com/bukkit/mcteam/gson/DefaultTypeAdapters.java

@@ -0,0 +1,893 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+import java.lang.reflect.ParameterizedType;
+import java.lang.reflect.Type;
+import java.math.BigDecimal;
+import java.math.BigInteger;
+import java.net.MalformedURLException;
+import java.net.URI;
+import java.net.URISyntaxException;
+import java.net.URL;
+import java.sql.Time;
+import java.sql.Timestamp;
+import java.text.DateFormat;
+import java.text.ParseException;
+import java.text.SimpleDateFormat;
+import java.util.Calendar;
+import java.util.Collection;
+import java.util.Date;
+import java.util.GregorianCalendar;
+import java.util.HashSet;
+import java.util.LinkedHashMap;
+import java.util.LinkedList;
+import java.util.Locale;
+import java.util.Map;
+import java.util.Properties;
+import java.util.Set;
+import java.util.SortedSet;
+import java.util.StringTokenizer;
+import java.util.TreeSet;
+import java.util.UUID;
+
+/**
+ * List of all the default type adapters ({@link JsonSerializer}s, {@link JsonDeserializer}s,
+ * and {@link InstanceCreator}s.
+ *
+ * @author Inderjeet Singh
+ * @author Joel Leitch
+ */
+final class DefaultTypeAdapters {
+
+  private static final DefaultDateTypeAdapter DATE_TYPE_ADAPTER = new DefaultDateTypeAdapter();
+  private static final DefaultJavaSqlDateTypeAdapter JAVA_SQL_DATE_TYPE_ADAPTER =
+    new DefaultJavaSqlDateTypeAdapter();
+  private static final DefaultTimeTypeAdapter TIME_TYPE_ADAPTER =
+    new DefaultTimeTypeAdapter();
+  private static final DefaultTimestampDeserializer TIMESTAMP_DESERIALIZER =
+    new DefaultTimestampDeserializer();
+
+  @SuppressWarnings("rawtypes")
+  private static final EnumTypeAdapter ENUM_TYPE_ADAPTER = new EnumTypeAdapter();
+  private static final UrlTypeAdapter URL_TYPE_ADAPTER = new UrlTypeAdapter();
+  private static final UriTypeAdapter URI_TYPE_ADAPTER = new UriTypeAdapter();
+  private static final UuidTypeAdapter UUUID_TYPE_ADAPTER = new UuidTypeAdapter();
+  private static final LocaleTypeAdapter LOCALE_TYPE_ADAPTER = new LocaleTypeAdapter();
+  private static final CollectionTypeAdapter COLLECTION_TYPE_ADAPTER = new CollectionTypeAdapter();
+  private static final MapTypeAdapter MAP_TYPE_ADAPTER = new MapTypeAdapter();
+  private static final BigDecimalTypeAdapter BIG_DECIMAL_TYPE_ADAPTER = new BigDecimalTypeAdapter();
+  private static final BigIntegerTypeAdapter BIG_INTEGER_TYPE_ADAPTER = new BigIntegerTypeAdapter();
+
+  private static final BooleanTypeAdapter BOOLEAN_TYPE_ADAPTER = new BooleanTypeAdapter();
+  private static final ByteTypeAdapter BYTE_TYPE_ADAPTER = new ByteTypeAdapter();
+  private static final CharacterTypeAdapter CHARACTER_TYPE_ADAPTER = new CharacterTypeAdapter();
+  private static final DoubleDeserializer DOUBLE_TYPE_ADAPTER = new DoubleDeserializer();
+  private static final FloatDeserializer FLOAT_TYPE_ADAPTER = new FloatDeserializer();
+  private static final IntegerTypeAdapter INTEGER_TYPE_ADAPTER = new IntegerTypeAdapter();
+  private static final LongDeserializer LONG_DESERIALIZER = new LongDeserializer();
+  private static final NumberTypeAdapter NUMBER_TYPE_ADAPTER = new NumberTypeAdapter();
+  private static final ShortTypeAdapter SHORT_TYPE_ADAPTER = new ShortTypeAdapter();
+  private static final StringTypeAdapter STRING_TYPE_ADAPTER = new StringTypeAdapter();
+
+  private static final PropertiesCreator PROPERTIES_CREATOR = new PropertiesCreator();
+  private static final TreeSetCreator TREE_SET_CREATOR = new TreeSetCreator();
+  private static final HashSetCreator HASH_SET_CREATOR = new HashSetCreator();
+  private static final GregorianCalendarTypeAdapter GREGORIAN_CALENDAR_TYPE_ADAPTER =
+    new GregorianCalendarTypeAdapter();
+
+  // The constants DEFAULT_SERIALIZERS, DEFAULT_DESERIALIZERS, and DEFAULT_INSTANCE_CREATORS
+  // must be defined after the constants for the type adapters. Otherwise, the type adapter
+  // constants will appear as nulls.
+  private static final ParameterizedTypeHandlerMap<JsonSerializer<?>> DEFAULT_SERIALIZERS =
+      createDefaultSerializers();
+  private static final ParameterizedTypeHandlerMap<JsonDeserializer<?>> DEFAULT_DESERIALIZERS =
+      createDefaultDeserializers();
+  private static final ParameterizedTypeHandlerMap<InstanceCreator<?>> DEFAULT_INSTANCE_CREATORS =
+      createDefaultInstanceCreators();
+
+  private static ParameterizedTypeHandlerMap<JsonSerializer<?>> createDefaultSerializers() {
+    ParameterizedTypeHandlerMap<JsonSerializer<?>> map =
+        new ParameterizedTypeHandlerMap<JsonSerializer<?>>();
+
+    map.registerForTypeHierarchy(Enum.class, ENUM_TYPE_ADAPTER);
+    map.register(URL.class, URL_TYPE_ADAPTER);
+    map.register(URI.class, URI_TYPE_ADAPTER);
+    map.register(UUID.class, UUUID_TYPE_ADAPTER);
+    map.register(Locale.class, LOCALE_TYPE_ADAPTER);
+    map.registerForTypeHierarchy(Collection.class, COLLECTION_TYPE_ADAPTER);
+    map.registerForTypeHierarchy(Map.class, MAP_TYPE_ADAPTER);
+    map.register(Date.class, DATE_TYPE_ADAPTER);
+    map.register(java.sql.Date.class, JAVA_SQL_DATE_TYPE_ADAPTER);
+    map.register(Timestamp.class, DATE_TYPE_ADAPTER);
+    map.register(Time.class, TIME_TYPE_ADAPTER);
+    map.register(Calendar.class, GREGORIAN_CALENDAR_TYPE_ADAPTER);
+    map.register(GregorianCalendar.class, GREGORIAN_CALENDAR_TYPE_ADAPTER);
+    map.register(BigDecimal.class, BIG_DECIMAL_TYPE_ADAPTER);
+    map.register(BigInteger.class, BIG_INTEGER_TYPE_ADAPTER);
+
+    // Add primitive serializers
+    map.register(Boolean.class, BOOLEAN_TYPE_ADAPTER);
+    map.register(boolean.class, BOOLEAN_TYPE_ADAPTER);
+    map.register(Byte.class, BYTE_TYPE_ADAPTER);
+    map.register(byte.class, BYTE_TYPE_ADAPTER);
+    map.register(Character.class, CHARACTER_TYPE_ADAPTER);
+    map.register(char.class, CHARACTER_TYPE_ADAPTER);
+    map.register(Integer.class, INTEGER_TYPE_ADAPTER);
+    map.register(int.class, INTEGER_TYPE_ADAPTER);
+    map.register(Number.class, NUMBER_TYPE_ADAPTER);
+    map.register(Short.class, SHORT_TYPE_ADAPTER);
+    map.register(short.class, SHORT_TYPE_ADAPTER);
+    map.register(String.class, STRING_TYPE_ADAPTER);
+
+    map.makeUnmodifiable();
+    return map;
+  }
+
+  private static ParameterizedTypeHandlerMap<JsonDeserializer<?>> createDefaultDeserializers() {
+    ParameterizedTypeHandlerMap<JsonDeserializer<?>> map =
+        new ParameterizedTypeHandlerMap<JsonDeserializer<?>>();
+    map.registerForTypeHierarchy(Enum.class, wrapDeserializer(ENUM_TYPE_ADAPTER));
+    map.register(URL.class, wrapDeserializer(URL_TYPE_ADAPTER));
+    map.register(URI.class, wrapDeserializer(URI_TYPE_ADAPTER));
+    map.register(UUID.class, wrapDeserializer(UUUID_TYPE_ADAPTER));
+    map.register(Locale.class, wrapDeserializer(LOCALE_TYPE_ADAPTER));
+    map.registerForTypeHierarchy(Collection.class, wrapDeserializer(COLLECTION_TYPE_ADAPTER));
+    map.registerForTypeHierarchy(Map.class, wrapDeserializer(MAP_TYPE_ADAPTER));
+    map.register(Date.class, wrapDeserializer(DATE_TYPE_ADAPTER));
+    map.register(java.sql.Date.class, wrapDeserializer(JAVA_SQL_DATE_TYPE_ADAPTER));
+    map.register(Timestamp.class, wrapDeserializer(TIMESTAMP_DESERIALIZER));
+    map.register(Time.class, wrapDeserializer(TIME_TYPE_ADAPTER));
+    map.register(Calendar.class, GREGORIAN_CALENDAR_TYPE_ADAPTER);
+    map.register(GregorianCalendar.class, GREGORIAN_CALENDAR_TYPE_ADAPTER);
+    map.register(BigDecimal.class, wrapDeserializer(BIG_DECIMAL_TYPE_ADAPTER));
+    map.register(BigInteger.class, wrapDeserializer(BIG_INTEGER_TYPE_ADAPTER));
+
+    // Add primitive deserializers
+    map.register(Boolean.class, wrapDeserializer(BOOLEAN_TYPE_ADAPTER));
+    map.register(boolean.class, wrapDeserializer(BOOLEAN_TYPE_ADAPTER));
+    map.register(Byte.class, wrapDeserializer(BYTE_TYPE_ADAPTER));
+    map.register(byte.class, wrapDeserializer(BYTE_TYPE_ADAPTER));
+    map.register(Character.class, wrapDeserializer(CHARACTER_TYPE_ADAPTER));
+    map.register(char.class, wrapDeserializer(CHARACTER_TYPE_ADAPTER));
+    map.register(Double.class, wrapDeserializer(DOUBLE_TYPE_ADAPTER));
+    map.register(double.class, wrapDeserializer(DOUBLE_TYPE_ADAPTER));
+    map.register(Float.class, wrapDeserializer(FLOAT_TYPE_ADAPTER));
+    map.register(float.class, wrapDeserializer(FLOAT_TYPE_ADAPTER));
+    map.register(Integer.class, wrapDeserializer(INTEGER_TYPE_ADAPTER));
+    map.register(int.class, wrapDeserializer(INTEGER_TYPE_ADAPTER));
+    map.register(Long.class, wrapDeserializer(LONG_DESERIALIZER));
+    map.register(long.class, wrapDeserializer(LONG_DESERIALIZER));
+    map.register(Number.class, wrapDeserializer(NUMBER_TYPE_ADAPTER));
+    map.register(Short.class, wrapDeserializer(SHORT_TYPE_ADAPTER));
+    map.register(short.class, wrapDeserializer(SHORT_TYPE_ADAPTER));
+    map.register(String.class, wrapDeserializer(STRING_TYPE_ADAPTER));
+
+    map.makeUnmodifiable();
+    return map;
+  }
+
+  private static ParameterizedTypeHandlerMap<InstanceCreator<?>> createDefaultInstanceCreators() {
+    ParameterizedTypeHandlerMap<InstanceCreator<?>> map =
+        new ParameterizedTypeHandlerMap<InstanceCreator<?>>();
+    map.registerForTypeHierarchy(Map.class, MAP_TYPE_ADAPTER);
+
+    // Add Collection type instance creators
+    map.registerForTypeHierarchy(Collection.class, COLLECTION_TYPE_ADAPTER);
+
+    map.registerForTypeHierarchy(Set.class, HASH_SET_CREATOR);
+    map.registerForTypeHierarchy(SortedSet.class, TREE_SET_CREATOR);
+    map.register(Properties.class, PROPERTIES_CREATOR);
+    map.makeUnmodifiable();
+    return map;
+  }
+
+  @SuppressWarnings({"unchecked", "rawtypes"})
+  private static JsonDeserializer<?> wrapDeserializer(JsonDeserializer<?> deserializer) {
+    return new JsonDeserializerExceptionWrapper(deserializer);
+  }
+
+  static ParameterizedTypeHandlerMap<JsonSerializer<?>> getDefaultSerializers() {
+    return getDefaultSerializers(false, LongSerializationPolicy.DEFAULT);
+  }
+
+  static ParameterizedTypeHandlerMap<JsonSerializer<?>> getDefaultSerializers(
+      boolean serializeSpecialFloatingPointValues, LongSerializationPolicy longSerializationPolicy) {
+    ParameterizedTypeHandlerMap<JsonSerializer<?>> serializers =
+        new ParameterizedTypeHandlerMap<JsonSerializer<?>>();
+
+    // Double primitive
+    DefaultTypeAdapters.DoubleSerializer doubleSerializer =
+        new DefaultTypeAdapters.DoubleSerializer(serializeSpecialFloatingPointValues);
+    serializers.registerIfAbsent(Double.class, doubleSerializer);
+    serializers.registerIfAbsent(double.class, doubleSerializer);
+
+    // Float primitive
+    DefaultTypeAdapters.FloatSerializer floatSerializer =
+        new DefaultTypeAdapters.FloatSerializer(serializeSpecialFloatingPointValues);
+    serializers.registerIfAbsent(Float.class, floatSerializer);
+    serializers.registerIfAbsent(float.class, floatSerializer);
+
+    // Long primitive
+    DefaultTypeAdapters.LongSerializer longSerializer =
+        new DefaultTypeAdapters.LongSerializer(longSerializationPolicy);
+    serializers.registerIfAbsent(Long.class, longSerializer);
+    serializers.registerIfAbsent(long.class, longSerializer);
+
+    serializers.registerIfAbsent(DEFAULT_SERIALIZERS);
+    return serializers;
+  }
+
+  static ParameterizedTypeHandlerMap<JsonDeserializer<?>> getDefaultDeserializers() {
+    return DEFAULT_DESERIALIZERS;
+  }
+
+  static ParameterizedTypeHandlerMap<InstanceCreator<?>> getDefaultInstanceCreators() {
+    return DEFAULT_INSTANCE_CREATORS;
+  }
+
+  static class DefaultDateTypeAdapter implements JsonSerializer<Date>, JsonDeserializer<Date> {
+    private final DateFormat format;
+
+    DefaultDateTypeAdapter() {
+      this.format = DateFormat.getDateTimeInstance();
+    }
+
+    DefaultDateTypeAdapter(final String datePattern) {
+      this.format = new SimpleDateFormat(datePattern);
+    }
+
+    DefaultDateTypeAdapter(final int style) {
+      this.format = DateFormat.getDateInstance(style);
+    }
+
+    public DefaultDateTypeAdapter(final int dateStyle, final int timeStyle) {
+      this.format = DateFormat.getDateTimeInstance(dateStyle, timeStyle);
+    }
+
+    // These methods need to be synchronized since JDK DateFormat classes are not thread-safe
+    // See issue 162
+    public JsonElement serialize(Date src, Type typeOfSrc, JsonSerializationContext context) {
+      synchronized (format) {
+        String dateFormatAsString = format.format(src);
+        return new JsonPrimitive(dateFormatAsString);
+      }
+    }
+
+    public Date deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
+        throws JsonParseException {
+      if (!(json instanceof JsonPrimitive)) {
+        throw new JsonParseException("The date should be a string value");
+      }
+      try {
+        synchronized (format) {
+          return format.parse(json.getAsString());
+        }
+      } catch (ParseException e) {
+        throw new JsonSyntaxException(e);
+      }
+    }
+
+    @Override
+    public String toString() {
+      StringBuilder sb = new StringBuilder();
+      sb.append(DefaultDateTypeAdapter.class.getSimpleName());
+      sb.append('(').append(format.getClass().getSimpleName()).append(')');
+      return sb.toString();
+    }
+  }
+
+  static class DefaultJavaSqlDateTypeAdapter implements JsonSerializer<java.sql.Date>,
+      JsonDeserializer<java.sql.Date> {
+    private final DateFormat format;
+    DefaultJavaSqlDateTypeAdapter() {
+      this.format = new SimpleDateFormat("MMM d, yyyy");
+    }
+
+    public JsonElement serialize(java.sql.Date src, Type typeOfSrc,
+        JsonSerializationContext context) {
+      synchronized (format) {
+        String dateFormatAsString = format.format(src);
+        return new JsonPrimitive(dateFormatAsString);
+      }
+    }
+
+    public java.sql.Date deserialize(JsonElement json, Type typeOfT,
+        JsonDeserializationContext context) throws JsonParseException {
+      if (!(json instanceof JsonPrimitive)) {
+        throw new JsonParseException("The date should be a string value");
+      }
+      try {
+        synchronized (format) {
+          Date date = format.parse(json.getAsString());
+          return new java.sql.Date(date.getTime());
+        }
+      } catch (ParseException e) {
+        throw new JsonSyntaxException(e);
+      }
+    }
+  }
+
+  static class DefaultTimestampDeserializer implements JsonDeserializer<Timestamp> {
+    public Timestamp deserialize(JsonElement json, Type typeOfT,
+        JsonDeserializationContext context) throws JsonParseException {
+      Date date = context.deserialize(json, Date.class);
+      return new Timestamp(date.getTime());
+    }
+  }
+
+  static class DefaultTimeTypeAdapter implements JsonSerializer<Time>, JsonDeserializer<Time> {
+    private final DateFormat format;
+    DefaultTimeTypeAdapter() {
+      this.format = new SimpleDateFormat("hh:mm:ss a");
+    }
+    public JsonElement serialize(Time src, Type typeOfSrc, JsonSerializationContext context) {
+      synchronized (format) {
+        String dateFormatAsString = format.format(src);
+        return new JsonPrimitive(dateFormatAsString);
+      }
+    }
+    public Time deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
+        throws JsonParseException {
+      if (!(json instanceof JsonPrimitive)) {
+        throw new JsonParseException("The date should be a string value");
+      }
+      try {
+        synchronized (format) {
+          Date date = format.parse(json.getAsString());
+          return new Time(date.getTime());
+        }
+      } catch (ParseException e) {
+        throw new JsonSyntaxException(e);
+      }
+    }
+  }
+
+  private static class GregorianCalendarTypeAdapter
+      implements JsonSerializer<GregorianCalendar>, JsonDeserializer<GregorianCalendar> {
+
+    private static final String YEAR = "year";
+    private static final String MONTH = "month";
+    private static final String DAY_OF_MONTH = "dayOfMonth";
+    private static final String HOUR_OF_DAY = "hourOfDay";
+    private static final String MINUTE = "minute";
+    private static final String SECOND = "second";
+
+    public JsonElement serialize(GregorianCalendar src, Type typeOfSrc,
+        JsonSerializationContext context) {
+      JsonObject obj = new JsonObject();
+      obj.addProperty(YEAR, src.get(Calendar.YEAR));
+      obj.addProperty(MONTH, src.get(Calendar.MONTH));
+      obj.addProperty(DAY_OF_MONTH, src.get(Calendar.DAY_OF_MONTH));
+      obj.addProperty(HOUR_OF_DAY, src.get(Calendar.HOUR_OF_DAY));
+      obj.addProperty(MINUTE, src.get(Calendar.MINUTE));
+      obj.addProperty(SECOND, src.get(Calendar.SECOND));
+      return obj;
+    }
+
+    public GregorianCalendar deserialize(JsonElement json, Type typeOfT,
+        JsonDeserializationContext context) throws JsonParseException {
+      JsonObject obj = json.getAsJsonObject();
+      int year = obj.get(YEAR).getAsInt();
+      int month = obj.get(MONTH).getAsInt();
+      int dayOfMonth = obj.get(DAY_OF_MONTH).getAsInt();
+      int hourOfDay = obj.get(HOUR_OF_DAY).getAsInt();
+      int minute = obj.get(MINUTE).getAsInt();
+      int second = obj.get(SECOND).getAsInt();
+      return new GregorianCalendar(year, month, dayOfMonth, hourOfDay, minute, second);
+    }
+
+    @Override
+    public String toString() {
+      return GregorianCalendarTypeAdapter.class.getSimpleName();
+    }
+  }
+
+  @SuppressWarnings("unchecked")
+  private static class EnumTypeAdapter<T extends Enum<T>>
+      implements JsonSerializer<T>, JsonDeserializer<T> {
+    public JsonElement serialize(T src, Type typeOfSrc, JsonSerializationContext context) {
+      return new JsonPrimitive(src.name());
+    }
+
+    @SuppressWarnings("cast")
+    public T deserialize(JsonElement json, Type classOfT, JsonDeserializationContext context)
+        throws JsonParseException {
+      return (T) Enum.valueOf((Class<T>) classOfT, json.getAsString());
+    }
+
+    @Override
+    public String toString() {
+      return EnumTypeAdapter.class.getSimpleName();
+    }
+  }
+
+  private static class UrlTypeAdapter implements JsonSerializer<URL>, JsonDeserializer<URL> {
+    public JsonElement serialize(URL src, Type typeOfSrc, JsonSerializationContext context) {
+      return new JsonPrimitive(src.toExternalForm());
+    }
+
+    public URL deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
+        throws JsonParseException {
+      try {
+        return new URL(json.getAsString());
+      } catch (MalformedURLException e) {
+        throw new JsonSyntaxException(e);
+      }
+    }
+
+    @Override
+    public String toString() {
+      return UrlTypeAdapter.class.getSimpleName();
+    }
+  }
+
+  private static class UriTypeAdapter implements JsonSerializer<URI>, JsonDeserializer<URI> {
+    public JsonElement serialize(URI src, Type typeOfSrc, JsonSerializationContext context) {
+      return new JsonPrimitive(src.toASCIIString());
+    }
+    public URI deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
+    throws JsonParseException {
+      try {
+        return new URI(json.getAsString());
+      } catch (URISyntaxException e) {
+        throw new JsonSyntaxException(e);
+      }
+    }
+    @Override
+    public String toString() {
+      return UriTypeAdapter.class.getSimpleName();
+    }
+  }
+
+  private static class UuidTypeAdapter implements JsonSerializer<UUID>, JsonDeserializer<UUID> {
+    public JsonElement serialize(UUID src, Type typeOfSrc, JsonSerializationContext context) {
+      return new JsonPrimitive(src.toString());
+    }
+
+    public UUID deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
+        throws JsonParseException {
+      return UUID.fromString(json.getAsString());
+    }
+
+    @Override
+    public String toString() {
+        return UuidTypeAdapter.class.getSimpleName();
+    }
+  }
+
+  private static class LocaleTypeAdapter
+      implements JsonSerializer<Locale>, JsonDeserializer<Locale> {
+    public JsonElement serialize(Locale src, Type typeOfSrc, JsonSerializationContext context) {
+      return new JsonPrimitive(src.toString());
+    }
+
+    public Locale deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
+        throws JsonParseException {
+      String locale = json.getAsString();
+      StringTokenizer tokenizer = new StringTokenizer(locale, "_");
+      String language = null;
+      String country = null;
+      String variant = null;
+      if (tokenizer.hasMoreElements()) {
+        language = tokenizer.nextToken();
+      }
+      if (tokenizer.hasMoreElements()) {
+        country = tokenizer.nextToken();
+      }
+      if (tokenizer.hasMoreElements()) {
+        variant = tokenizer.nextToken();
+      }
+      if (country == null && variant == null) {
+        return new Locale(language);
+      } else if (variant == null) {
+        return new Locale(language, country);
+      } else {
+        return new Locale(language, country, variant);
+      }
+    }
+
+    @Override
+    public String toString() {
+      return LocaleTypeAdapter.class.getSimpleName();
+    }
+  }
+
+  @SuppressWarnings({"unchecked", "rawtypes"})
+  private static class CollectionTypeAdapter implements JsonSerializer<Collection>,
+      JsonDeserializer<Collection>, InstanceCreator<Collection> {
+    public JsonElement serialize(Collection src, Type typeOfSrc, JsonSerializationContext context) {
+      if (src == null) {
+        return JsonNull.createJsonNull();
+      }
+      JsonArray array = new JsonArray();
+      Type childGenericType = null;
+      if (typeOfSrc instanceof ParameterizedType) {
+        childGenericType = new TypeInfoCollection(typeOfSrc).getElementType();
+      }
+      for (Object child : src) {
+        if (child == null) {
+          array.add(JsonNull.createJsonNull());
+        } else {
+          Type childType = (childGenericType == null || childGenericType == Object.class)
+              ? child.getClass() : childGenericType;
+          JsonElement element = context.serialize(child, childType);
+          array.add(element);
+        }
+      }
+      return array;
+    }
+
+    public Collection deserialize(JsonElement json, Type typeOfT,
+        JsonDeserializationContext context) throws JsonParseException {
+      if (json.isJsonNull()) {
+        return null;
+      }
+      // Use ObjectConstructor to create instance instead of hard-coding a specific type.
+      // This handles cases where users are using their own subclass of Collection.
+      Collection collection = constructCollectionType(typeOfT, context);
+      Type childType = new TypeInfoCollection(typeOfT).getElementType();
+      for (JsonElement childElement : json.getAsJsonArray()) {
+        if (childElement == null || childElement.isJsonNull()) {
+          collection.add(null);
+        } else {
+          Object value = context.deserialize(childElement, childType);
+          collection.add(value);
+        }
+      }
+      return collection;
+    }
+
+    private Collection constructCollectionType(Type collectionType,
+        JsonDeserializationContext context) {
+      JsonDeserializationContextDefault contextImpl = (JsonDeserializationContextDefault) context;
+      ObjectConstructor objectConstructor = contextImpl.getObjectConstructor();
+      return (Collection) objectConstructor.construct(collectionType);
+    }
+
+    public Collection createInstance(Type type) {
+      return new LinkedList();
+    }
+  }
+
+  private static class PropertiesCreator implements InstanceCreator<Properties> {
+    public Properties createInstance(Type type) {
+      return new Properties();
+    }
+  }
+
+  @SuppressWarnings({"unchecked", "rawtypes"})
+  static class MapTypeAdapter implements JsonSerializer<Map>, JsonDeserializer<Map>,
+      InstanceCreator<Map> {
+
+    public JsonElement serialize(Map src, Type typeOfSrc, JsonSerializationContext context) {
+      JsonObject map = new JsonObject();
+      Type childGenericType = null;
+      if (typeOfSrc instanceof ParameterizedType) {
+        childGenericType = new TypeInfoMap(typeOfSrc).getValueType();
+      }
+
+      for (Map.Entry entry : (Set<Map.Entry>) src.entrySet()) {
+        Object value = entry.getValue();
+
+        JsonElement valueElement;
+        if (value == null) {
+          valueElement = JsonNull.createJsonNull();
+        } else {
+          Type childType = (childGenericType == null)
+              ? value.getClass() : childGenericType;
+          valueElement = context.serialize(value, childType);
+        }
+        map.add(String.valueOf(entry.getKey()), valueElement);
+      }
+      return map;
+    }
+
+    public Map deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
+        throws JsonParseException {
+      // Use ObjectConstructor to create instance instead of hard-coding a specific type.
+      // This handles cases where users are using their own subclass of Map.
+      Map<Object, Object> map = constructMapType(typeOfT, context);
+      TypeInfoMap mapTypeInfo = new TypeInfoMap(typeOfT);
+      for (Map.Entry<String, JsonElement> entry : json.getAsJsonObject().entrySet()) {
+        Object key = context.deserialize(new JsonPrimitive(entry.getKey()), mapTypeInfo.getKeyType());
+        Object value = context.deserialize(entry.getValue(), mapTypeInfo.getValueType());
+        map.put(key, value);
+      }
+      return map;
+    }
+
+    private Map constructMapType(Type mapType, JsonDeserializationContext context) {
+      JsonDeserializationContextDefault contextImpl = (JsonDeserializationContextDefault) context;
+      ObjectConstructor objectConstructor = contextImpl.getObjectConstructor();
+      return (Map) objectConstructor.construct(mapType);
+    }
+
+    public Map createInstance(Type type) {
+      return new LinkedHashMap();
+    }
+
+    @Override
+    public String toString() {
+      return MapTypeAdapter.class.getSimpleName();
+    }
+  }
+
+  private static class BigDecimalTypeAdapter
+      implements JsonSerializer<BigDecimal>, JsonDeserializer<BigDecimal> {
+    public JsonElement serialize(BigDecimal src, Type typeOfSrc, JsonSerializationContext context) {
+      return new JsonPrimitive(src);
+    }
+
+    public BigDecimal deserialize(JsonElement json, Type typeOfT,
+        JsonDeserializationContext context) throws JsonParseException {
+      return json.getAsBigDecimal();
+    }
+
+    @Override
+    public String toString() {
+      return BigDecimalTypeAdapter.class.getSimpleName();
+    }
+  }
+
+  private static class BigIntegerTypeAdapter
+      implements JsonSerializer<BigInteger>, JsonDeserializer<BigInteger> {
+
+    public JsonElement serialize(BigInteger src, Type typeOfSrc, JsonSerializationContext context) {
+      return new JsonPrimitive(src);
+    }
+
+    public BigInteger deserialize(JsonElement json, Type typeOfT,
+        JsonDeserializationContext context) throws JsonParseException {
+      return json.getAsBigInteger();
+    }
+
+    @Override
+    public String toString() {
+      return BigIntegerTypeAdapter.class.getSimpleName();
+    }
+  }
+
+  private static class NumberTypeAdapter
+      implements JsonSerializer<Number>, JsonDeserializer<Number> {
+    public JsonElement serialize(Number src, Type typeOfSrc, JsonSerializationContext context) {
+      return new JsonPrimitive(src);
+    }
+
+    public Number deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
+        throws JsonParseException {
+      return json.getAsNumber();
+    }
+
+    @Override
+    public String toString() {
+      return NumberTypeAdapter.class.getSimpleName();
+    }
+  }
+
+  private static class LongSerializer implements JsonSerializer<Long> {
+    private final LongSerializationPolicy longSerializationPolicy;
+
+    private LongSerializer(LongSerializationPolicy longSerializationPolicy) {
+      this.longSerializationPolicy = longSerializationPolicy;
+    }
+
+    public JsonElement serialize(Long src, Type typeOfSrc, JsonSerializationContext context) {
+      return longSerializationPolicy.serialize(src);
+    }
+
+    @Override
+    public String toString() {
+      return LongSerializer.class.getSimpleName();
+    }
+  }
+
+  private static class LongDeserializer implements JsonDeserializer<Long> {
+    public Long deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
+        throws JsonParseException {
+      return json.getAsLong();
+    }
+
+    @Override
+    public String toString() {
+      return LongDeserializer.class.getSimpleName();
+    }
+  }
+
+  private static class IntegerTypeAdapter
+      implements JsonSerializer<Integer>, JsonDeserializer<Integer> {
+    public JsonElement serialize(Integer src, Type typeOfSrc, JsonSerializationContext context) {
+      return new JsonPrimitive(src);
+    }
+
+    public Integer deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
+        throws JsonParseException {
+      return json.getAsInt();
+    }
+
+    @Override
+    public String toString() {
+      return IntegerTypeAdapter.class.getSimpleName();
+    }
+  }
+
+  private static class ShortTypeAdapter
+      implements JsonSerializer<Short>, JsonDeserializer<Short> {
+    public JsonElement serialize(Short src, Type typeOfSrc, JsonSerializationContext context) {
+      return new JsonPrimitive(src);
+    }
+
+    public Short deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
+        throws JsonParseException {
+      return json.getAsShort();
+    }
+
+    @Override
+    public String toString() {
+      return ShortTypeAdapter.class.getSimpleName();
+    }
+  }
+
+  private static class ByteTypeAdapter implements JsonSerializer<Byte>, JsonDeserializer<Byte> {
+    public JsonElement serialize(Byte src, Type typeOfSrc, JsonSerializationContext context) {
+      return new JsonPrimitive(src);
+    }
+
+    public Byte deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
+        throws JsonParseException {
+      return json.getAsByte();
+    }
+
+    @Override
+    public String toString() {
+      return ByteTypeAdapter.class.getSimpleName();
+    }
+  }
+
+  static class FloatSerializer implements JsonSerializer<Float> {
+    private final boolean serializeSpecialFloatingPointValues;
+
+    FloatSerializer(boolean serializeSpecialDoubleValues) {
+      this.serializeSpecialFloatingPointValues = serializeSpecialDoubleValues;
+    }
+
+    public JsonElement serialize(Float src, Type typeOfSrc, JsonSerializationContext context) {
+      if (!serializeSpecialFloatingPointValues) {
+        if (Float.isNaN(src) || Float.isInfinite(src)) {
+          throw new IllegalArgumentException(src
+              + " is not a valid float value as per JSON specification. To override this"
+              + " behavior, use GsonBuilder.serializeSpecialFloatingPointValues() method.");
+        }
+      }
+      return new JsonPrimitive(src);
+    }
+  }
+
+  private static class FloatDeserializer implements JsonDeserializer<Float> {
+    public Float deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
+        throws JsonParseException {
+      return json.getAsFloat();
+    }
+
+    @Override
+    public String toString() {
+      return FloatDeserializer.class.getSimpleName();
+    }
+  }
+
+  static class DoubleSerializer implements JsonSerializer<Double> {
+    private final boolean serializeSpecialFloatingPointValues;
+
+    DoubleSerializer(boolean serializeSpecialDoubleValues) {
+      this.serializeSpecialFloatingPointValues = serializeSpecialDoubleValues;
+    }
+
+    public JsonElement serialize(Double src, Type typeOfSrc, JsonSerializationContext context) {
+      if (!serializeSpecialFloatingPointValues) {
+        if (Double.isNaN(src) || Double.isInfinite(src)) {
+          throw new IllegalArgumentException(src
+              + " is not a valid double value as per JSON specification. To override this"
+              + " behavior, use GsonBuilder.serializeSpecialDoubleValues() method.");
+        }
+      }
+      return new JsonPrimitive(src);
+    }
+  }
+
+  private static class DoubleDeserializer implements JsonDeserializer<Double> {
+    public Double deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
+        throws JsonParseException {
+      return json.getAsDouble();
+    }
+
+    @Override
+    public String toString() {
+      return DoubleDeserializer.class.getSimpleName();
+    }
+  }
+
+  private static class CharacterTypeAdapter
+      implements JsonSerializer<Character>, JsonDeserializer<Character> {
+    public JsonElement serialize(Character src, Type typeOfSrc, JsonSerializationContext context) {
+      return new JsonPrimitive(src);
+    }
+
+    public Character deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
+        throws JsonParseException {
+      return json.getAsCharacter();
+    }
+
+    @Override
+    public String toString() {
+      return CharacterTypeAdapter.class.getSimpleName();
+    }
+  }
+
+  private static class StringTypeAdapter
+      implements JsonSerializer<String>, JsonDeserializer<String> {
+    public JsonElement serialize(String src, Type typeOfSrc, JsonSerializationContext context) {
+      return new JsonPrimitive(src);
+    }
+
+    public String deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
+        throws JsonParseException {
+      return json.getAsString();
+    }
+
+    @Override
+    public String toString() {
+      return StringTypeAdapter.class.getSimpleName();
+    }
+  }
+
+  private static class BooleanTypeAdapter
+      implements JsonSerializer<Boolean>, JsonDeserializer<Boolean> {
+    public JsonElement serialize(Boolean src, Type typeOfSrc, JsonSerializationContext context) {
+      return new JsonPrimitive(src);
+    }
+
+    public Boolean deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
+        throws JsonParseException {
+      return json.getAsBoolean();
+    }
+
+    @Override
+    public String toString() {
+      return BooleanTypeAdapter.class.getSimpleName();
+    }
+  }
+
+  private static class TreeSetCreator implements InstanceCreator<TreeSet<?>> {
+    public TreeSet<?> createInstance(Type type) {
+      return new TreeSet<Object>();
+    }
+    @Override
+    public String toString() {
+      return TreeSetCreator.class.getSimpleName();
+    }
+  }
+
+  private static class HashSetCreator implements InstanceCreator<HashSet<?>> {
+    public HashSet<?> createInstance(Type type) {
+      return new HashSet<Object>();
+    }
+    @Override
+    public String toString() {
+      return HashSetCreator.class.getSimpleName();
+    }
+  }
+}

src/com/bukkit/mcteam/gson/DelegatingJsonElementVisitor.java

@@ -0,0 +1,117 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+import java.io.IOException;
+
+/**
+ * A simple implementation of the {@link JsonElementVisitor} that simply delegates the method
+ * invocation onto a {@code delegate} instance of the {@link JsonElementVisitor}.  This object
+ * can be used to build a chain of visitors such that each Visitor instance can perform some
+ * operation on the {@link JsonElement} and then pass on the input to the delegate.  This kind
+ * of pattern is sometimes referred as a "Chain of Responsibility".
+ *
+ * <p>The following is an example use case:
+ *
+ * <pre>
+ * class JsonEscapingVisitor extends DelegatingJsonElementVisitor {
+ *   public JsonEscapingVisitor(JsonElementVisitor) {
+ *     super(visitor);
+ *   }
+ *
+ *   public void visitPrimitive(JsonPrimitive primitive) {
+ *     JsonPrimitive escapedPrimitive = escapePrimitiveObject(primitive);
+ *     super.visitPrimitive(escapedPrimitive);
+ *   }
+ * }
+ *
+ * JsonElementVisitor visitor = new JsonEscapingVisitor(new FormattingVisitor());
+ * </pre></p>
+ *
+ * @author Joel Leitch
+ */
+class DelegatingJsonElementVisitor implements JsonElementVisitor {
+  private final JsonElementVisitor delegate;
+
+  protected DelegatingJsonElementVisitor(JsonElementVisitor delegate) {
+    Preconditions.checkNotNull(delegate);
+    this.delegate = delegate;
+  }
+
+  public void endArray(JsonArray array) throws IOException {
+    delegate.endArray(array);
+  }
+
+  public void endObject(JsonObject object) throws IOException {
+    delegate.endObject(object);
+  }
+
+  public void startArray(JsonArray array) throws IOException {
+    delegate.startArray(array);
+  }
+
+  public void startObject(JsonObject object) throws IOException {
+    delegate.startObject(object);
+  }
+
+  public void visitArrayMember(JsonArray parent, JsonPrimitive member, 
+      boolean isFirst) throws IOException {
+    delegate.visitArrayMember(parent, member, isFirst);
+  }
+
+  public void visitArrayMember(JsonArray parent, JsonArray member, 
+      boolean isFirst) throws IOException {
+    delegate.visitArrayMember(parent, member, isFirst);
+  }
+
+  public void visitArrayMember(JsonArray parent, JsonObject member, 
+      boolean isFirst) throws IOException {
+    delegate.visitArrayMember(parent, member, isFirst);
+  }
+
+  public void visitObjectMember(JsonObject parent, String memberName, JsonPrimitive member, 
+      boolean isFirst) throws IOException {
+    delegate.visitObjectMember(parent, memberName, member, isFirst);
+  }
+
+  public void visitObjectMember(JsonObject parent, String memberName, JsonArray member, 
+      boolean isFirst) throws IOException {
+    delegate.visitObjectMember(parent, memberName, member, isFirst);
+  }
+
+  public void visitObjectMember(JsonObject parent, String memberName, JsonObject member, 
+      boolean isFirst) throws IOException {
+    delegate.visitObjectMember(parent, memberName, member, isFirst);
+  }
+
+  public void visitNullObjectMember(JsonObject parent, String memberName, 
+      boolean isFirst) throws IOException {
+    delegate.visitNullObjectMember(parent, memberName, isFirst);
+  }
+
+  public void visitPrimitive(JsonPrimitive primitive) throws IOException {
+    delegate.visitPrimitive(primitive);
+  }
+
+  public void visitNull() throws IOException {
+    delegate.visitNull();
+  }
+
+  public void visitNullArrayMember(JsonArray parent, boolean isFirst) throws IOException {
+    delegate.visitNullArrayMember(parent, isFirst);
+  }
+}

src/com/bukkit/mcteam/gson/DisjunctionExclusionStrategy.java

@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+import java.util.Collection;
+
+/**
+ * A wrapper class used to collect numerous {@link ExclusionStrategy} objects
+ * and perform a short-circuited OR operation.
+ *
+ * @author Joel Leitch
+ */
+final class DisjunctionExclusionStrategy implements ExclusionStrategy {
+  private final Collection<ExclusionStrategy> strategies;
+
+  public DisjunctionExclusionStrategy(Collection<ExclusionStrategy> strategies) {
+    Preconditions.checkNotNull(strategies);
+    this.strategies = strategies;
+  }
+
+  public boolean shouldSkipField(FieldAttributes f) {
+    for (ExclusionStrategy strategy : strategies) {
+      if (strategy.shouldSkipField(f)) {
+        return true;
+      }
+    }
+    return false;
+  }
+
+  public boolean shouldSkipClass(Class<?> clazz) {
+    for (ExclusionStrategy strategy : strategies) {
+      if (strategy.shouldSkipClass(clazz)) {
+        return true;
+      }
+    }
+    return false;
+  }
+}

src/com/bukkit/mcteam/gson/Escaper.java

@@ -0,0 +1,160 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+import java.io.IOException;
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.Set;
+
+/**
+ * A utility class that is used to perform JSON escaping so that ", <, >, etc. characters are
+ * properly encoded in the JSON string representation before returning to the client code.
+ *
+ * <p>This class contains a single method to escape a passed in string value:
+ * <pre>
+ *   String jsonStringValue = "beforeQuote\"afterQuote";
+ *   String escapedValue = Escaper.escapeJsonString(jsonStringValue);
+ * </pre></p>
+ *
+ * @author Inderjeet Singh
+ * @author Joel Leitch
+ */
+final class Escaper {
+
+  private static final char[] HEX_CHARS = {
+    '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'
+  };
+
+  private static final Set<Character> JS_ESCAPE_CHARS;
+  private static final Set<Character> HTML_ESCAPE_CHARS;
+
+  static {
+    Set<Character> mandatoryEscapeSet = new HashSet<Character>();
+    mandatoryEscapeSet.add('"');
+    mandatoryEscapeSet.add('\\');
+    JS_ESCAPE_CHARS = Collections.unmodifiableSet(mandatoryEscapeSet);
+
+    Set<Character> htmlEscapeSet = new HashSet<Character>();
+    htmlEscapeSet.add('<');
+    htmlEscapeSet.add('>');
+    htmlEscapeSet.add('&');
+    htmlEscapeSet.add('=');
+    htmlEscapeSet.add('\''); 
+//    htmlEscapeSet.add('/');  -- Removing slash for now since it causes some incompatibilities
+    HTML_ESCAPE_CHARS = Collections.unmodifiableSet(htmlEscapeSet);
+  }
+
+  private final boolean escapeHtmlCharacters;
+  
+  Escaper(boolean escapeHtmlCharacters) {
+    this.escapeHtmlCharacters = escapeHtmlCharacters;
+  }
+  
+  public String escapeJsonString(CharSequence plainText) {
+    StringBuffer escapedString = new StringBuffer(plainText.length() + 20);
+    try {
+      escapeJsonString(plainText, escapedString);
+    } catch (IOException e) {
+      throw new RuntimeException(e);
+    }
+    return escapedString.toString();
+  }
+
+  private void escapeJsonString(CharSequence plainText, StringBuffer out) throws IOException {
+    int pos = 0;  // Index just past the last char in plainText written to out.
+    int len = plainText.length();
+    
+    for (int charCount, i = 0; i < len; i += charCount) {
+      int codePoint = Character.codePointAt(plainText, i);
+      charCount = Character.charCount(codePoint);
+      
+       if (!isControlCharacter(codePoint) && !mustEscapeCharInJsString(codePoint)) {
+          continue;
+       }
+
+       out.append(plainText, pos, i);
+       pos = i + charCount;
+       switch (codePoint) {
+         case '\b':
+           out.append("\\b");
+           break;
+         case '\t':
+           out.append("\\t");
+           break;
+         case '\n':
+           out.append("\\n");
+           break;
+         case '\f':
+           out.append("\\f");
+           break;
+         case '\r':
+           out.append("\\r");
+           break;
+         case '\\':
+           out.append("\\\\");
+           break;
+         case '/':
+           out.append("\\/");
+           break;
+         case '"':
+           out.append("\\\"");
+           break;
+         default:
+           appendHexJavaScriptRepresentation(codePoint, out);
+           break;
+       }
+     }
+     out.append(plainText, pos, len);
+  }
+  
+  private boolean mustEscapeCharInJsString(int codepoint) {
+    if (!Character.isSupplementaryCodePoint(codepoint)) {
+      char c = (char) codepoint;
+      return JS_ESCAPE_CHARS.contains(c)
+          || (escapeHtmlCharacters && HTML_ESCAPE_CHARS.contains(c));
+    }
+    return false;
+  }
+
+  private static boolean isControlCharacter(int codePoint) {
+    // JSON spec defines these code points as control characters, so they must be escaped
+    return codePoint < 0x20
+        || codePoint == 0x2028  // Line separator
+        || codePoint == 0x2029  // Paragraph separator
+        || (codePoint >= 0x7f && codePoint <= 0x9f);
+  }
+
+  private static void appendHexJavaScriptRepresentation(int codePoint, Appendable out)
+      throws IOException {
+    if (Character.isSupplementaryCodePoint(codePoint)) {
+      // Handle supplementary unicode values which are not representable in
+      // javascript.  We deal with these by escaping them as two 4B sequences
+      // so that they will round-trip properly when sent from java to javascript
+      // and back.
+      char[] surrogates = Character.toChars(codePoint);
+      appendHexJavaScriptRepresentation(surrogates[0], out);
+      appendHexJavaScriptRepresentation(surrogates[1], out);
+      return;
+    }
+    out.append("\\u")
+        .append(HEX_CHARS[(codePoint >>> 12) & 0xf])
+        .append(HEX_CHARS[(codePoint >>> 8) & 0xf])
+        .append(HEX_CHARS[(codePoint >>> 4) & 0xf])
+        .append(HEX_CHARS[codePoint & 0xf]);
+  }
+}

src/com/bukkit/mcteam/gson/ExclusionStrategy.java

@@ -0,0 +1,95 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+/**
+ * A strategy (or policy) definition that is used to decide whether or not a field or top-level
+ * class should be serialized or deserialized as part of the JSON output/input. For serialization,
+ * if the {@link #shouldSkipClass(Class)} method returns false then that class or field type
+ * will not be part of the JSON output.  For deserialization, if {@link #shouldSkipClass(Class)}
+ * returns false, then it will not be set as part of the Java object structure.
+ *
+ * <p>The following are a few examples that shows how you can use this exclusion mechanism.
+ *
+ * <p><strong>Exclude fields and objects based on a particular class type:</strong>
+ * <pre class="code">
+ * private static class SpecificClassExclusionStrategy implements ExclusionStrategy {
+ *   private final Class&lt;?&gt; excludedThisClass;
+ *
+ *   public SpecificClassExclusionStrategy(Class&lt;?&gt; excludedThisClass) {
+ *     this.excludedThisClass = excludedThisClass;
+ *   }
+ *
+ *   public boolean shouldSkipClass(Class&lt;?&gt; clazz) {
+ *     return excludedThisClass.equals(clazz);
+ *   }
+ *
+ *   public boolean shouldSkipField(FieldAttributes f) {
+ *     return excludedThisClass.equals(f.getDeclaredClass());
+ *   }
+ * }
+ * </pre>
+ *
+ * <p><strong>Excludes fields and objects based on a particular annotation:</strong>
+ * <pre class="code">
+ * public &#64interface FooAnnotation {
+ *   // some implementation here
+ * }
+ *
+ * // Excludes any field (or class) that is tagged with an "&#64FooAnnotation"
+ * private static class FooAnnotationExclusionStrategy implements ExclusionStrategy {
+ *   public boolean shouldSkipClass(Class&lt;?&gt; clazz) {
+ *     return clazz.getAnnotation(FooAnnotation.class) != null;
+ *   }
+ *
+ *   public boolean shouldSkipField(FieldAttributes f) {
+ *     return f.getAnnotation(FooAnnotation.class) != null;
+ *   }
+ * }
+ * </pre>
+ *
+ * <p>Now if you want to configure {@code Gson} to use a user defined exclusion strategy, then
+ * the {@code GsonBuilder} is required. The following is an example of how you can use the
+ * {@code GsonBuilder} to configure Gson to use one of the above sample:
+ * <pre class="code">
+ * ExclusionStrategy excludeStrings = new UserDefinedExclusionStrategy(String.class);
+ * Gson gson = new GsonBuilder()
+ *     .setExclusionStrategies(excludeStrings)
+ *     .create();
+ * </pre>
+ *
+ * @author Inderjeet Singh
+ * @author Joel Leitch
+ *
+ * @see GsonBuilder#setExclusionStrategies(ExclusionStrategy...)
+ *
+ * @since 1.4
+ */
+public interface ExclusionStrategy {
+
+  /**
+   * @param f the field object that is under test
+   * @return true if the field should be ignored; otherwise false
+   */
+  public boolean shouldSkipField(FieldAttributes f);
+
+  /**
+   * @param clazz the class object that is under test
+   * @return true if the class should be ignored; otherwise false
+   */
+  public boolean shouldSkipClass(Class<?> clazz);
+}

src/com/bukkit/mcteam/gson/ExposeAnnotationDeserializationExclusionStrategy.java

@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2009 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.bukkit.mcteam.gson;
+
+import com.bukkit.mcteam.gson.annotations.Expose;
+
+/**
+ * Excludes fields that do not have the {@link Expose} annotation
+ *
+ * @author Inderjeet Singh
+ * @author Joel Leitch
+ */
+final class ExposeAnnotationDeserializationExclusionStrategy implements ExclusionStrategy {
+
+  public boolean shouldSkipClass(Class<?> clazz) {
+    return false;
+  }
+
+  public boolean shouldSkipField(FieldAttributes f) {
+    Expose annotation = f.getAnnotation(Expose.class);
+    if (annotation == null) {
+      return true;
+    }
+    return !annotation.deserialize();
+  }
+}

src/com/bukkit/mcteam/gson/ExposeAnnotationSerializationExclusionStrategy.java

@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+import com.bukkit.mcteam.gson.annotations.Expose;
+
+/**
+ * Excludes fields that do not have the {@link Expose} annotation
+ *
+ * @author Inderjeet Singh
+ * @author Joel Leitch
+ */
+final class ExposeAnnotationSerializationExclusionStrategy implements ExclusionStrategy {
+
+  public boolean shouldSkipClass(Class<?> clazz) {
+    return false;
+  }
+
+  public boolean shouldSkipField(FieldAttributes f) {
+    Expose annotation = f.getAnnotation(Expose.class);
+    if (annotation == null) {
+      return true;
+    }
+    return !annotation.serialize();
+  }
+}

src/com/bukkit/mcteam/gson/FieldAttributes.java

@@ -0,0 +1,229 @@
+/*
+ * Copyright (C) 2009 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+import java.lang.annotation.Annotation;
+import java.lang.reflect.Field;
+import java.lang.reflect.Type;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.Collections;
+
+/**
+ * A data object that stores attributes of a field.
+ *
+ * <p>This class is immutable; therefore, it can be safely shared across threads.
+ *
+ * @author Inderjeet Singh
+ * @author Joel Leitch
+ *
+ * @since 1.4
+ */
+public final class FieldAttributes {
+  private static final String MAX_CACHE_PROPERTY_NAME =
+      "com.bukkit.mcteam.gson.annotation_cache_size_hint";
+
+  private static final Cache<Pair<Class<?>, String>, Collection<Annotation>> ANNOTATION_CACHE =
+      new LruCache<Pair<Class<?>,String>, Collection<Annotation>>(getMaxCacheSize());
+
+  private final Class<?> declaringClazz;
+  private final Field field;
+  private final Class<?> declaredType;
+  private final boolean isSynthetic;
+  private final int modifiers;
+  private final String name;
+
+  // Fields used for lazy initialization
+  private Type genericType;
+  private Collection<Annotation> annotations;
+
+  /**
+   * Constructs a Field Attributes object from the {@code f}.
+   *
+   * @param f the field to pull attributes from
+   */
+  FieldAttributes(final Class<?> declaringClazz, final Field f) {
+    Preconditions.checkNotNull(declaringClazz);
+    this.declaringClazz = declaringClazz;
+    name = f.getName();
+    declaredType = f.getType();
+    isSynthetic = f.isSynthetic();
+    modifiers = f.getModifiers();
+    field = f;
+  }
+
+  private static int getMaxCacheSize() {
+    final int defaultMaxCacheSize = 2000;
+    try {
+      String propertyValue = System.getProperty(
+          MAX_CACHE_PROPERTY_NAME, String.valueOf(defaultMaxCacheSize));
+      return Integer.parseInt(propertyValue);
+    } catch (NumberFormatException e) {
+      return defaultMaxCacheSize;
+    }
+  }
+
+  /**
+   * @return the declaring class that contains this field
+   */
+  public Class<?> getDeclaringClass() {
+    return declaringClazz;
+  }
+
+  /**
+   * @return the name of the field
+   */
+  public String getName() {
+    return name;
+  }
+
+  /**
+   * <p>For example, assume the following class definition:
+   * <pre class="code">
+   * public class Foo {
+   *   private String bar;
+   *   private List&lt;String&gt; red;
+   * }
+   *
+   * Type listParmeterizedType = new TypeToken<List<String>>() {}.getType();
+   * </pre>
+   *
+   * <p>This method would return {@code String.class} for the {@code bar} field and
+   * {@code listParameterizedType} for the {@code red} field.
+   *
+   * @return the specific type declared for this field
+   */
+  public Type getDeclaredType() {
+    if (genericType == null) {
+      genericType = field.getGenericType();
+    }
+    return genericType;
+  }
+
+  /**
+   * Returns the {@code Class<?>} object that was declared for this field.
+   *
+   * <p>For example, assume the following class definition:
+   * <pre class="code">
+   * public class Foo {
+   *   private String bar;
+   *   private List&lt;String&gt; red;
+   * }
+   * </pre>
+   *
+   * <p>This method would return {@code String.class} for the {@code bar} field and
+   * {@code List.class} for the {@code red} field.
+   *
+   * @return the specific class object that was declared for the field
+   */
+  public Class<?> getDeclaredClass() {
+    return declaredType;
+  }
+
+  /**
+   * Return the {@code T} annotation object from this field if it exist; otherwise returns
+   * {@code null}.
+   *
+   * @param annotation the class of the annotation that will be retrieved
+   * @return the annotation instance if it is bound to the field; otherwise {@code null}
+   */
+  public <T extends Annotation> T getAnnotation(Class<T> annotation) {
+    return getAnnotationFromArray(getAnnotations(), annotation);
+  }
+
+  /**
+   * Return the annotations that are present on this field.
+   *
+   * @return an array of all the annotations set on the field
+   * @since 1.4
+   */
+  public Collection<Annotation> getAnnotations() {
+    if (annotations == null) {
+      Pair<Class<?>, String> key = new Pair<Class<?>, String>(declaringClazz, name);
+      annotations = ANNOTATION_CACHE.getElement(key);
+      if (annotations == null) {
+        annotations = Collections.unmodifiableCollection(
+            Arrays.asList(field.getAnnotations()));
+        ANNOTATION_CACHE.addElement(key, annotations);
+      }
+    }
+    return annotations;
+  }
+
+  /**
+   * Returns {@code true} if the field is defined with the {@code modifier}.
+   *
+   * <p>This method is meant to be called as:
+   * <pre class="code">
+   * boolean hasPublicModifier = fieldAttribute.hasModifier(java.lang.reflect.Modifier.PUBLIC);
+   * </pre>
+   *
+   * @see java.lang.reflect.Modifier
+   */
+  public boolean hasModifier(int modifier) {
+    return (modifiers & modifier) != 0;
+  }
+
+  /**
+   * This is exposed internally only for the removing synthetic fields from the JSON output.
+   *
+   * @throws IllegalAccessException
+   * @throws IllegalArgumentException
+   */
+  void set(Object instance, Object value) throws IllegalAccessException {
+    field.set(instance, value);
+  }
+
+  /**
+   * This is exposed internally only for the removing synthetic fields from the JSON output.
+   *
+   * @return true if the field is synthetic; otherwise false
+   * @throws IllegalAccessException
+   * @throws IllegalArgumentException
+   */
+  Object get(Object instance) throws IllegalAccessException {
+    return field.get(instance);
+  }
+
+  /**
+   * This is exposed internally only for the removing synthetic fields from the JSON output.
+   *
+   * @return true if the field is synthetic; otherwise false
+   */
+  boolean isSynthetic() {
+    return isSynthetic;
+  }
+
+  /**
+   * @deprecated remove this when {@link FieldNamingStrategy} is deleted.
+   */
+  @Deprecated
+  Field getFieldObject() {
+    return field;
+  }
+
+  @SuppressWarnings("unchecked")
+  private static <T extends Annotation> T getAnnotationFromArray(
+      Collection<Annotation> annotations, Class<T> annotation) {
+    for (Annotation a : annotations) {
+      if (a.annotationType() == annotation) {
+        return (T) a;
+      }
+    }
+    return null;
+  }
+}

src/com/bukkit/mcteam/gson/FieldNamingPolicy.java

@@ -0,0 +1,99 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+/**
+ * An enumeration that defines a few standard naming conventions for JSON field names.
+ * This enumeration should be used in conjunction with {@link com.bukkit.mcteam.gson.GsonBuilder}
+ * to configure a {@link com.bukkit.mcteam.gson.Gson} instance to properly translate Java field
+ * names into the desired JSON field names.
+ *
+ * @author Inderjeet Singh
+ * @author Joel Leitch
+ */
+public enum FieldNamingPolicy {
+  /**
+   * Using this naming policy with Gson will ensure that the first "letter" of the Java
+   * field name is capitalized when serialized to its JSON form.
+   *
+   * <p>Here's a few examples of the form "Java Field Name" ---> "JSON Field Name":</p>
+   * <ul>
+   *   <li>someFieldName ---> SomeFieldName</li>
+   *   <li>_someFieldName ---> _SomeFieldName</li>
+   * </ul>
+   */
+  UPPER_CAMEL_CASE(new ModifyFirstLetterNamingPolicy(
+      ModifyFirstLetterNamingPolicy.LetterModifier.UPPER)),
+
+  /**
+   * Using this naming policy with Gson will ensure that the first "letter" of the Java
+   * field name is capitalized when serialized to its JSON form and the words will be
+   * separated by a space.
+   *
+   * <p>Here's a few examples of the form "Java Field Name" ---> "JSON Field Name":</p>
+   * <ul>
+   *   <li>someFieldName ---> Some Field Name</li>
+   *   <li>_someFieldName ---> _Some Field Name</li>
+   * </ul>
+   * 
+   * @since 1.4
+   */
+  UPPER_CAMEL_CASE_WITH_SPACES(new UpperCamelCaseSeparatorNamingPolicy(" ")),
+          
+  /**
+   * Using this naming policy with Gson will modify the Java Field name from its camel cased
+   * form to a lower case field name where each word is separated by an underscore (_).
+   *
+   * <p>Here's a few examples of the form "Java Field Name" ---> "JSON Field Name":</p>
+   * <ul>
+   *   <li>someFieldName ---> some_field_name</li>
+   *   <li>_someFieldName ---> _some_field_name</li>
+   *   <li>aStringField ---> a_string_field</li>
+   *   <li>aURL ---> a_u_r_l</li>
+   * </ul>
+   */
+  LOWER_CASE_WITH_UNDERSCORES(new LowerCamelCaseSeparatorNamingPolicy("_")),
+  
+  /**
+   * Using this naming policy with Gson will modify the Java Field name from its camel cased
+   * form to a lower case field name where each word is separated by a dash (-).
+   *
+   * <p>Here's a few examples of the form "Java Field Name" ---> "JSON Field Name":</p>
+   * <ul>
+   *   <li>someFieldName ---> some-field-name</li>
+   *   <li>_someFieldName ---> _some-field-name</li>
+   *   <li>aStringField ---> a-string-field</li>
+   *   <li>aURL ---> a-u-r-l</li>
+   * </ul>
+   * Using dashes in JavaScript is not recommended since dash is also used for a minus sign in
+   * expressions. This requires that a field named with dashes is always accessed as a quoted
+   * property like {@code myobject['my-field']}. Accessing it as an object field
+   * {@code myobject.my-field} will result in an unintended javascript expression.
+   * @since 1.4
+   */
+  LOWER_CASE_WITH_DASHES(new LowerCamelCaseSeparatorNamingPolicy("-"));
+
+  private final FieldNamingStrategy2 namingPolicy;
+
+  private FieldNamingPolicy(FieldNamingStrategy2 namingPolicy) {
+    this.namingPolicy = namingPolicy;
+  }
+
+  FieldNamingStrategy2 getFieldNamingPolicy() {
+    return namingPolicy;
+  }
+}

src/com/bukkit/mcteam/gson/FieldNamingStrategy.java

@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+import java.lang.reflect.Field;
+
+/**
+ * A mechanism for providing custom field naming in Gson.  This allows the client code to translate
+ * field names into a particular convention that is not supported as a normal Java field
+ * declaration rules.  For example, Java does not support "-" characters in a field name.
+ *
+ * @author Inderjeet Singh
+ * @author Joel Leitch
+ * @since 1.3
+ */
+public interface FieldNamingStrategy {
+
+  /**
+   * Translates the field name into its JSON field name representation.
+   *
+   * @param f the field object that we are translating
+   * @return the translated field name.
+   * @since 1.3
+   */
+  public String translateName(Field f);
+}

src/com/bukkit/mcteam/gson/FieldNamingStrategy2.java

@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2010 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+/**
+ * The new mechanism for providing custom field naming in Gson.  This allows the client code
+ * to translate field names into a particular convention that is not supported as a normal
+ * Java field declaration rules.  For example, Java does not support "-" characters in a
+ * field name.
+ *
+ * @author Inderjeet Singh
+ * @author Joel Leitch
+ */
+interface FieldNamingStrategy2 {
+
+  /**
+   * Translates the field name into its JSON field name representation.
+   *
+   * @param f the field that is being translated
+   * @return the translated field name.
+   * @since 1.3
+   */
+  public String translateName(FieldAttributes f);
+}

src/com/bukkit/mcteam/gson/FieldNamingStrategy2Adapter.java

@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2010 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+/**
+ * Adapts the old "deprecated" {@link FieldNamingStrategy} to the new {@link FieldNamingStrategy2}
+ * type. 
+ * 
+ * @author Inderjeet Singh
+ * @author Joel Leitch
+ */
+final class FieldNamingStrategy2Adapter implements FieldNamingStrategy2 {
+  private final FieldNamingStrategy adaptee;
+
+  public FieldNamingStrategy2Adapter(FieldNamingStrategy adaptee) {
+    Preconditions.checkNotNull(adaptee);
+    this.adaptee = adaptee;
+  }
+  
+  @SuppressWarnings("deprecation")
+  public String translateName(FieldAttributes f) {
+    return adaptee.translateName(f.getFieldObject());
+  }
+}

src/com/bukkit/mcteam/gson/GenericArrayTypeImpl.java

@@ -0,0 +1,70 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+import java.lang.reflect.GenericArrayType;
+import java.lang.reflect.Type;
+
+/**
+ * An simple pojo-like immutable instance of the {@link GenericArrayType}.  This object provides
+ * us the ability to create reflective types on demand.  This object is required for support
+ * object similar to the one defined below:
+ * <pre>
+ * class Foo<T> {
+ *   private final List<T>[] arrayOfListT;
+ *
+ *   Foo(List<T>[] arrayList) {
+ *     this.arrayOfListT = arrayList;
+ *   }
+ * }
+ * </pre>
+ *
+ * <p>During parsing or serialization, we know the real variable type parameter {@code T},
+ * so we can build a new {@code GenericTypeArray} with the "real" type parameters and
+ * pass that object along instead.
+ *
+ * @author Inderjeet Singh
+ * @author Joel Leitch
+ */
+final class GenericArrayTypeImpl implements GenericArrayType {
+
+  private final Type genericComponentType;
+
+  public GenericArrayTypeImpl(Type genericComponentType) {
+    this.genericComponentType = genericComponentType;
+  }
+
+  public Type getGenericComponentType() {
+    return genericComponentType;
+  }
+
+  @Override
+  public boolean equals(Object o) {
+    if (!(o instanceof  GenericArrayType)) {
+      return false;
+    }
+    GenericArrayType that = (GenericArrayType) o;
+    Type thatComponentType = that.getGenericComponentType();
+    return genericComponentType == null ?
+        thatComponentType == null : genericComponentType.equals(thatComponentType);
+  }
+
+  @Override
+  public int hashCode() {
+    return (genericComponentType == null) ? 0 : genericComponentType.hashCode();
+  }
+}

src/com/bukkit/mcteam/gson/Gson.java

@@ -0,0 +1,595 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+import com.bukkit.mcteam.gson.stream.JsonReader;
+import com.bukkit.mcteam.gson.stream.JsonToken;
+import com.bukkit.mcteam.gson.stream.JsonWriter;
+import com.bukkit.mcteam.gson.stream.MalformedJsonException;
+import java.io.IOException;
+import java.io.Reader;
+import java.io.StringReader;
+import java.io.StringWriter;
+import java.io.Writer;
+import java.lang.reflect.Modifier;
+import java.lang.reflect.Type;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * This is the main class for using Gson. Gson is typically used by first constructing a
+ * Gson instance and then invoking {@link #toJson(Object)} or {@link #fromJson(String, Class)}
+ * methods on it.
+ *
+ * <p>You can create a Gson instance by invoking {@code new Gson()} if the default configuration
+ * is all you need. You can also use {@link GsonBuilder} to build a Gson instance with various
+ * configuration options such as versioning support, pretty printing, custom
+ * {@link JsonSerializer}s, {@link JsonDeserializer}s, and {@link InstanceCreator}s.</p>
+ *
+ * <p>Here is an example of how Gson is used for a simple Class:
+ *
+ * <pre>
+ * Gson gson = new Gson(); // Or use new GsonBuilder().create();
+ * MyType target = new MyType();
+ * String json = gson.toJson(target); // serializes target to Json
+ * MyType target2 = gson.fromJson(json, MyType.class); // deserializes json into target2
+ * </pre></p>
+ *
+ * <p>If the object that your are serializing/deserializing is a {@code ParameterizedType}
+ * (i.e. contains at least one type parameter and may be an array) then you must use the
+ * {@link #toJson(Object, Type)} or {@link #fromJson(String, Type)} method.  Here is an
+ * example for serializing and deserialing a {@code ParameterizedType}:
+ *
+ * <pre>
+ * Type listType = new TypeToken&lt;List&lt;String&gt;&gt;() {}.getType();
+ * List&lt;String&gt; target = new LinkedList&lt;String&gt;();
+ * target.add("blah");
+ *
+ * Gson gson = new Gson();
+ * String json = gson.toJson(target, listType);
+ * List&lt;String&gt; target2 = gson.fromJson(json, listType);
+ * </pre></p>
+ *
+ * <p>See the <a href="https://sites.google.com/site/gson/gson-user-guide">Gson User Guide</a>
+ * for a more complete set of examples.</p>
+ *
+ * @see com.bukkit.mcteam.gson.reflect.TypeToken
+ *
+ * @author Inderjeet Singh
+ * @author Joel Leitch
+ */
+public final class Gson {
+
+  //TODO(inder): get rid of all the registerXXX methods and take all such parameters in the
+  // constructor instead. At the minimum, mark those methods private.
+
+  private static final String NULL_STRING = "null";
+
+  static final boolean DEFAULT_JSON_NON_EXECUTABLE = false;
+
+  // Default instances of plug-ins
+  static final AnonymousAndLocalClassExclusionStrategy DEFAULT_ANON_LOCAL_CLASS_EXCLUSION_STRATEGY =
+      new AnonymousAndLocalClassExclusionStrategy();
+  static final SyntheticFieldExclusionStrategy DEFAULT_SYNTHETIC_FIELD_EXCLUSION_STRATEGY =
+      new SyntheticFieldExclusionStrategy(true);
+  static final ModifierBasedExclusionStrategy DEFAULT_MODIFIER_BASED_EXCLUSION_STRATEGY =
+      new ModifierBasedExclusionStrategy(new int[] { Modifier.TRANSIENT, Modifier.STATIC });
+  static final FieldNamingStrategy2 DEFAULT_NAMING_POLICY =
+      new SerializedNameAnnotationInterceptingNamingPolicy(new JavaFieldNamingPolicy());
+
+  private static final ExclusionStrategy DEFAULT_EXCLUSION_STRATEGY =
+      createExclusionStrategy(VersionConstants.IGNORE_VERSIONS);
+
+  private static final String JSON_NON_EXECUTABLE_PREFIX = ")]}'\n";
+
+  private final ExclusionStrategy serializationStrategy;
+
+  private final ExclusionStrategy deserializationStrategy;
+
+  private final FieldNamingStrategy2 fieldNamingPolicy;
+  private final MappedObjectConstructor objectConstructor;
+
+  /** Map containing Type or Class objects as keys */
+  private final ParameterizedTypeHandlerMap<JsonSerializer<?>> serializers;
+
+  /** Map containing Type or Class objects as keys */
+  private final ParameterizedTypeHandlerMap<JsonDeserializer<?>> deserializers;
+
+  private final boolean serializeNulls;
+  private final boolean htmlSafe;
+  private final boolean generateNonExecutableJson;
+  private final boolean prettyPrinting;
+
+  /**
+   * Constructs a Gson object with default configuration. The default configuration has the
+   * following settings:
+   * <ul>
+   *   <li>The JSON generated by <code>toJson</code> methods is in compact representation. This
+   *   means that all the unneeded white-space is removed. You can change this behavior with
+   *   {@link GsonBuilder#setPrettyPrinting()}. </li>
+   *   <li>The generated JSON omits all the fields that are null. Note that nulls in arrays are
+   *   kept as is since an array is an ordered list. Moreover, if a field is not null, but its
+   *   generated JSON is empty, the field is kept. You can configure Gson to serialize null values
+   *   by setting {@link GsonBuilder#serializeNulls()}.</li>
+   *   <li>Gson provides default serialization and deserialization for Enums, {@link Map},
+   *   {@link java.net.URL}, {@link java.net.URI}, {@link java.util.Locale}, {@link java.util.Date},
+   *   {@link java.math.BigDecimal}, and {@link java.math.BigInteger} classes. If you would prefer
+   *   to change the default representation, you can do so by registering a type adapter through
+   *   {@link GsonBuilder#registerTypeAdapter(Type, Object)}. </li>
+   *   <li>The default Date format is same as {@link java.text.DateFormat#DEFAULT}. This format
+   *   ignores the millisecond portion of the date during serialization. You can change
+   *   this by invoking {@link GsonBuilder#setDateFormat(int)} or
+   *   {@link GsonBuilder#setDateFormat(String)}. </li>
+   *   <li>By default, Gson ignores the {@link com.bukkit.mcteam.gson.annotations.Expose} annotation.
+   *   You can enable Gson to serialize/deserialize only those fields marked with this annotation
+   *   through {@link GsonBuilder#excludeFieldsWithoutExposeAnnotation()}. </li>
+   *   <li>By default, Gson ignores the {@link com.bukkit.mcteam.gson.annotations.Since} annotation. You
+   *   can enable Gson to use this annotation through {@link GsonBuilder#setVersion(double)}.</li>
+   *   <li>The default field naming policy for the output Json is same as in Java. So, a Java class
+   *   field <code>versionNumber</code> will be output as <code>&quot;versionNumber@quot;</code> in
+   *   Json. The same rules are applied for mapping incoming Json to the Java classes. You can
+   *   change this policy through {@link GsonBuilder#setFieldNamingPolicy(FieldNamingPolicy)}.</li>
+   *   <li>By default, Gson excludes <code>transient</code> or <code>static</code> fields from
+   *   consideration for serialization and deserialization. You can change this behavior through
+   *   {@link GsonBuilder#excludeFieldsWithModifiers(int...)}.</li>
+   * </ul>
+   */
+  public Gson() {
+    this(DEFAULT_EXCLUSION_STRATEGY, DEFAULT_EXCLUSION_STRATEGY, DEFAULT_NAMING_POLICY,
+    new MappedObjectConstructor(DefaultTypeAdapters.getDefaultInstanceCreators()),
+    false, DefaultTypeAdapters.getDefaultSerializers(),
+    DefaultTypeAdapters.getDefaultDeserializers(), DEFAULT_JSON_NON_EXECUTABLE, true, false);
+  }
+
+  Gson(ExclusionStrategy serializationStrategy, ExclusionStrategy deserializationStrategy,
+       FieldNamingStrategy2 fieldNamingPolicy, MappedObjectConstructor objectConstructor,
+       boolean serializeNulls, ParameterizedTypeHandlerMap<JsonSerializer<?>> serializers,
+       ParameterizedTypeHandlerMap<JsonDeserializer<?>> deserializers,
+       boolean generateNonExecutableGson, boolean htmlSafe, boolean prettyPrinting) {
+    this.serializationStrategy = serializationStrategy;
+    this.deserializationStrategy = deserializationStrategy;
+    this.fieldNamingPolicy = fieldNamingPolicy;
+    this.objectConstructor = objectConstructor;
+    this.serializeNulls = serializeNulls;
+    this.serializers = serializers;
+    this.deserializers = deserializers;
+    this.generateNonExecutableJson = generateNonExecutableGson;
+    this.htmlSafe = htmlSafe;
+    this.prettyPrinting = prettyPrinting;
+  }
+
+  private ObjectNavigatorFactory createDefaultObjectNavigatorFactory(ExclusionStrategy strategy) {
+    return new ObjectNavigatorFactory(strategy, fieldNamingPolicy);
+  }
+
+  private static ExclusionStrategy createExclusionStrategy(double version) {
+    List<ExclusionStrategy> strategies = new LinkedList<ExclusionStrategy>();
+    strategies.add(DEFAULT_ANON_LOCAL_CLASS_EXCLUSION_STRATEGY);
+    strategies.add(DEFAULT_SYNTHETIC_FIELD_EXCLUSION_STRATEGY);
+    strategies.add(DEFAULT_MODIFIER_BASED_EXCLUSION_STRATEGY);
+    if (version != VersionConstants.IGNORE_VERSIONS) {
+      strategies.add(new VersionExclusionStrategy(version));
+    }
+    return new DisjunctionExclusionStrategy(strategies);
+  }
+
+  /**
+   * This method serializes the specified object into its equivalent representation as a tree of
+   * {@link JsonElement}s. This method should be used when the specified object is not a generic
+   * type. This method uses {@link Class#getClass()} to get the type for the specified object, but
+   * the {@code getClass()} loses the generic type information because of the Type Erasure feature
+   * of Java. Note that this method works fine if the any of the object fields are of generic type,
+   * just the object itself should not be of a generic type. If the object is of generic type, use
+   * {@link #toJsonTree(Object, Type)} instead.
+   *
+   * @param src the object for which Json representation is to be created setting for Gson
+   * @return Json representation of {@code src}.
+   * @since 1.4
+   */
+  public JsonElement toJsonTree(Object src) {
+    if (src == null) {
+      return JsonNull.createJsonNull();
+    }
+    return toJsonTree(src, src.getClass());
+  }
+
+  /**
+   * This method serializes the specified object, including those of generic types, into its
+   * equivalent representation as a tree of {@link JsonElement}s. This method must be used if the
+   * specified object is a generic type. For non-generic objects, use {@link #toJsonTree(Object)}
+   * instead.
+   *
+   * @param src the object for which JSON representation is to be created
+   * @param typeOfSrc The specific genericized type of src. You can obtain
+   * this type by using the {@link com.bukkit.mcteam.gson.reflect.TypeToken} class. For example,
+   * to get the type for {@code Collection<Foo>}, you should use:
+   * <pre>
+   * Type typeOfSrc = new TypeToken&lt;Collection&lt;Foo&gt;&gt;(){}.getType();
+   * </pre>
+   * @return Json representation of {@code src}
+   * @since 1.4
+   */
+  public JsonElement toJsonTree(Object src, Type typeOfSrc) {
+    if (src == null) {
+      return JsonNull.createJsonNull();
+    }
+    JsonSerializationContextDefault context = new JsonSerializationContextDefault(
+        createDefaultObjectNavigatorFactory(serializationStrategy), serializeNulls, serializers);
+    return context.serialize(src, typeOfSrc, true);
+  }
+
+  /**
+   * This method serializes the specified object into its equivalent Json representation.
+   * This method should be used when the specified object is not a generic type. This method uses
+   * {@link Class#getClass()} to get the type for the specified object, but the
+   * {@code getClass()} loses the generic type information because of the Type Erasure feature
+   * of Java. Note that this method works fine if the any of the object fields are of generic type,
+   * just the object itself should not be of a generic type. If the object is of generic type, use
+   * {@link #toJson(Object, Type)} instead. If you want to write out the object to a
+   * {@link Writer}, use {@link #toJson(Object, Appendable)} instead.
+   *
+   * @param src the object for which Json representation is to be created setting for Gson
+   * @return Json representation of {@code src}.
+   */
+  public String toJson(Object src) {
+    if (src == null) {
+      return serializeNulls ? NULL_STRING : "";
+    }
+    return toJson(src, src.getClass());
+  }
+
+  /**
+   * This method serializes the specified object, including those of generic types, into its
+   * equivalent Json representation. This method must be used if the specified object is a generic
+   * type. For non-generic objects, use {@link #toJson(Object)} instead. If you want to write out
+   * the object to a {@link Appendable}, use {@link #toJson(Object, Type, Appendable)} instead.
+   *
+   * @param src the object for which JSON representation is to be created
+   * @param typeOfSrc The specific genericized type of src. You can obtain
+   * this type by using the {@link com.bukkit.mcteam.gson.reflect.TypeToken} class. For example,
+   * to get the type for {@code Collection<Foo>}, you should use:
+   * <pre>
+   * Type typeOfSrc = new TypeToken&lt;Collection&lt;Foo&gt;&gt;(){}.getType();
+   * </pre>
+   * @return Json representation of {@code src}
+   */
+  public String toJson(Object src, Type typeOfSrc) {
+    StringWriter writer = new StringWriter();
+    toJson(toJsonTree(src, typeOfSrc), writer);
+    return writer.toString();
+  }
+
+  /**
+   * This method serializes the specified object into its equivalent Json representation.
+   * This method should be used when the specified object is not a generic type. This method uses
+   * {@link Class#getClass()} to get the type for the specified object, but the
+   * {@code getClass()} loses the generic type information because of the Type Erasure feature
+   * of Java. Note that this method works fine if the any of the object fields are of generic type,
+   * just the object itself should not be of a generic type. If the object is of generic type, use
+   * {@link #toJson(Object, Type, Appendable)} instead.
+   *
+   * @param src the object for which Json representation is to be created setting for Gson
+   * @param writer Writer to which the Json representation needs to be written
+   * @throws JsonIOException if there was a problem writing to the writer
+   * @since 1.2
+   */
+  public void toJson(Object src, Appendable writer) throws JsonIOException {
+    try {
+      if (src != null) {
+        toJson(src, src.getClass(), writer);
+      } else if (serializeNulls) {
+        writeOutNullString(writer);
+      }
+    } catch (IOException ioe) {
+      throw new RuntimeException(ioe);
+    }
+  }
+
+  /**
+   * This method serializes the specified object, including those of generic types, into its
+   * equivalent Json representation. This method must be used if the specified object is a generic
+   * type. For non-generic objects, use {@link #toJson(Object, Appendable)} instead.
+   *
+   * @param src the object for which JSON representation is to be created
+   * @param typeOfSrc The specific genericized type of src. You can obtain
+   * this type by using the {@link com.bukkit.mcteam.gson.reflect.TypeToken} class. For example,
+   * to get the type for {@code Collection<Foo>}, you should use:
+   * <pre>
+   * Type typeOfSrc = new TypeToken&lt;Collection&lt;Foo&gt;&gt;(){}.getType();
+   * </pre>
+   * @param writer Writer to which the Json representation of src needs to be written.
+   * @throws JsonIOException if there was a problem writing to the writer
+   * @since 1.2
+   */
+  public void toJson(Object src, Type typeOfSrc, Appendable writer) throws JsonIOException {
+    JsonElement jsonElement = toJsonTree(src, typeOfSrc);
+    toJson(jsonElement, writer);
+  }
+
+  /**
+   * Writes the JSON representation of {@code src} of type {@code typeOfSrc} to
+   * {@code writer}.
+   * @throws JsonIOException if there was a problem writing to the writer
+   */
+  public void toJson(Object src, Type typeOfSrc, JsonWriter writer) throws JsonIOException {
+    toJson(toJsonTree(src, typeOfSrc), writer);
+  }
+
+  /**
+   * Converts a tree of {@link JsonElement}s into its equivalent JSON representation.
+   *
+   * @param jsonElement root of a tree of {@link JsonElement}s
+   * @return JSON String representation of the tree
+   * @since 1.4
+   */
+  public String toJson(JsonElement jsonElement) {
+    StringWriter writer = new StringWriter();
+    toJson(jsonElement, writer);
+    return writer.toString();
+  }
+
+  /**
+   * Writes out the equivalent JSON for a tree of {@link JsonElement}s.
+   *
+   * @param jsonElement root of a tree of {@link JsonElement}s
+   * @param writer Writer to which the Json representation needs to be written
+   * @throws JsonIOException if there was a problem writing to the writer
+   * @since 1.4
+   */
+  public void toJson(JsonElement jsonElement, Appendable writer) throws JsonIOException {
+    try {
+      if (generateNonExecutableJson) {
+        writer.append(JSON_NON_EXECUTABLE_PREFIX);
+      }
+      JsonWriter jsonWriter = new JsonWriter(Streams.writerForAppendable(writer));
+      if (prettyPrinting) {
+        jsonWriter.setIndent("  ");
+      }
+      toJson(jsonElement, jsonWriter);
+    } catch (IOException e) {
+      throw new RuntimeException(e);
+    }
+  }
+
+  /**
+   * Writes the JSON for {@code jsonElement} to {@code writer}.
+   * @throws JsonIOException if there was a problem writing to the writer
+   */
+  public void toJson(JsonElement jsonElement, JsonWriter writer) throws JsonIOException {
+    boolean oldLenient = writer.isLenient();
+    writer.setLenient(true);
+    boolean oldHtmlSafe = writer.isHtmlSafe();
+    writer.setHtmlSafe(htmlSafe);
+    try {
+      Streams.write(jsonElement, serializeNulls, writer);
+    } catch (IOException e) {
+      throw new JsonIOException(e);
+    } finally {
+      writer.setLenient(oldLenient);
+      writer.setHtmlSafe(oldHtmlSafe);
+    }
+  }
+
+  /**
+   * This method deserializes the specified Json into an object of the specified class. It is not
+   * suitable to use if the specified class is a generic type since it will not have the generic
+   * type information because of the Type Erasure feature of Java. Therefore, this method should not
+   * be used if the desired type is a generic type. Note that this method works fine if the any of
+   * the fields of the specified object are generics, just the object itself should not be a
+   * generic type. For the cases when the object is of generic type, invoke
+   * {@link #fromJson(String, Type)}. If you have the Json in a {@link Reader} instead of
+   * a String, use {@link #fromJson(Reader, Class)} instead.
+   *
+   * @param <T> the type of the desired object
+   * @param json the string from which the object is to be deserialized
+   * @param classOfT the class of T
+   * @return an object of type T from the string
+   * @throws JsonSyntaxException if json is not a valid representation for an object of type
+   * classOfT
+   */
+  public <T> T fromJson(String json, Class<T> classOfT) throws JsonSyntaxException {
+    Object object = fromJson(json, (Type) classOfT);
+    return Primitives.wrap(classOfT).cast(object);
+  }
+
+  /**
+   * This method deserializes the specified Json into an object of the specified type. This method
+   * is useful if the specified object is a generic type. For non-generic objects, use
+   * {@link #fromJson(String, Class)} instead. If you have the Json in a {@link Reader} instead of
+   * a String, use {@link #fromJson(Reader, Type)} instead.
+   *
+   * @param <T> the type of the desired object
+   * @param json the string from which the object is to be deserialized
+   * @param typeOfT The specific genericized type of src. You can obtain this type by using the
+   * {@link com.bukkit.mcteam.gson.reflect.TypeToken} class. For example, to get the type for
+   * {@code Collection<Foo>}, you should use:
+   * <pre>
+   * Type typeOfT = new TypeToken&lt;Collection&lt;Foo&gt;&gt;(){}.getType();
+   * </pre>
+   * @return an object of type T from the string
+   * @throws JsonParseException if json is not a valid representation for an object of type typeOfT
+   * @throws JsonSyntaxException if json is not a valid representation for an object of type
+   */
+  @SuppressWarnings("unchecked")
+  public <T> T fromJson(String json, Type typeOfT) throws JsonSyntaxException {
+    if (json == null) {
+      return null;
+    }
+    StringReader reader = new StringReader(json);
+    T target = (T) fromJson(reader, typeOfT);
+    return target;
+  }
+
+  /**
+   * This method deserializes the Json read from the specified reader into an object of the
+   * specified class. It is not suitable to use if the specified class is a generic type since it
+   * will not have the generic type information because of the Type Erasure feature of Java.
+   * Therefore, this method should not be used if the desired type is a generic type. Note that
+   * this method works fine if the any of the fields of the specified object are generics, just the
+   * object itself should not be a generic type. For the cases when the object is of generic type,
+   * invoke {@link #fromJson(Reader, Type)}. If you have the Json in a String form instead of a
+   * {@link Reader}, use {@link #fromJson(String, Class)} instead.
+   *
+   * @param <T> the type of the desired object
+   * @param json the reader producing the Json from which the object is to be deserialized.
+   * @param classOfT the class of T
+   * @return an object of type T from the string
+   * @throws JsonIOException if there was a problem reading from the Reader
+   * @throws JsonSyntaxException if json is not a valid representation for an object of type
+   * @since 1.2
+   */
+  public <T> T fromJson(Reader json, Class<T> classOfT) throws JsonSyntaxException, JsonIOException {
+    JsonReader jsonReader = new JsonReader(json);
+    Object object = fromJson(jsonReader, classOfT);
+    assertFullConsumption(object, jsonReader);
+    return Primitives.wrap(classOfT).cast(object);
+  }
+
+  /**
+   * This method deserializes the Json read from the specified reader into an object of the
+   * specified type. This method is useful if the specified object is a generic type. For
+   * non-generic objects, use {@link #fromJson(Reader, Class)} instead. If you have the Json in a
+   * String form instead of a {@link Reader}, use {@link #fromJson(String, Type)} instead.
+   *
+   * @param <T> the type of the desired object
+   * @param json the reader producing Json from which the object is to be deserialized
+   * @param typeOfT The specific genericized type of src. You can obtain this type by using the
+   * {@link com.bukkit.mcteam.gson.reflect.TypeToken} class. For example, to get the type for
+   * {@code Collection<Foo>}, you should use:
+   * <pre>
+   * Type typeOfT = new TypeToken&lt;Collection&lt;Foo&gt;&gt;(){}.getType();
+   * </pre>
+   * @return an object of type T from the json
+   * @throws JsonIOException if there was a problem reading from the Reader
+   * @throws JsonSyntaxException if json is not a valid representation for an object of type
+   * @since 1.2
+   */
+  public <T> T fromJson(Reader json, Type typeOfT) throws JsonIOException, JsonSyntaxException {
+    JsonReader jsonReader = new JsonReader(json);
+    T object = this.<T>fromJson(jsonReader, typeOfT);
+    assertFullConsumption(object, jsonReader);
+    return object;
+  }
+
+  private static void assertFullConsumption(Object obj, JsonReader reader) {
+    try {
+      if (obj != null && reader.peek() != JsonToken.END_DOCUMENT) {
+        throw new JsonIOException("JSON document was not fully consumed.");
+      }
+    } catch (MalformedJsonException e) {
+      throw new JsonSyntaxException(e);
+    } catch (IOException e) {
+      throw new JsonIOException(e);
+    }
+  }
+
+  /**
+   * Reads the next JSON value from {@code reader} and convert it to an object
+   * of type {@code typeOfT}.
+   * Since Type is not parameterized by T, this method is type unsafe and should be used carefully
+   *
+   * @throws JsonIOException if there was a problem writing to the Reader
+   * @throws JsonSyntaxException if json is not a valid representation for an object of type
+   */
+  @SuppressWarnings("unchecked")
+  public <T> T fromJson(JsonReader reader, Type typeOfT) throws JsonIOException, JsonSyntaxException {
+    boolean oldLenient = reader.isLenient();
+    reader.setLenient(true);
+    try {
+      JsonElement root = Streams.parse(reader);
+      return (T) fromJson(root, typeOfT);
+    } finally {
+      reader.setLenient(oldLenient);
+    }
+  }
+
+  /**
+   * This method deserializes the Json read from the specified parse tree into an object of the
+   * specified type. It is not suitable to use if the specified class is a generic type since it
+   * will not have the generic type information because of the Type Erasure feature of Java.
+   * Therefore, this method should not be used if the desired type is a generic type. Note that
+   * this method works fine if the any of the fields of the specified object are generics, just the
+   * object itself should not be a generic type. For the cases when the object is of generic type,
+   * invoke {@link #fromJson(JsonElement, Type)}.
+   * @param <T> the type of the desired object
+   * @param json the root of the parse tree of {@link JsonElement}s from which the object is to
+   * be deserialized
+   * @param classOfT The class of T
+   * @return an object of type T from the json
+   * @throws JsonSyntaxException if json is not a valid representation for an object of type typeOfT
+   * @since 1.3
+   */
+  public <T> T fromJson(JsonElement json, Class<T> classOfT) throws JsonSyntaxException {
+    Object object = fromJson(json, (Type) classOfT);
+    return Primitives.wrap(classOfT).cast(object);
+  }
+
+  /**
+   * This method deserializes the Json read from the specified parse tree into an object of the
+   * specified type. This method is useful if the specified object is a generic type. For
+   * non-generic objects, use {@link #fromJson(JsonElement, Class)} instead.
+   *
+   * @param <T> the type of the desired object
+   * @param json the root of the parse tree of {@link JsonElement}s from which the object is to
+   * be deserialized
+   * @param typeOfT The specific genericized type of src. You can obtain this type by using the
+   * {@link com.bukkit.mcteam.gson.reflect.TypeToken} class. For example, to get the type for
+   * {@code Collection<Foo>}, you should use:
+   * <pre>
+   * Type typeOfT = new TypeToken&lt;Collection&lt;Foo&gt;&gt;(){}.getType();
+   * </pre>
+   * @return an object of type T from the json
+   * @throws JsonSyntaxException if json is not a valid representation for an object of type typeOfT
+   * @since 1.3
+   */
+  @SuppressWarnings("unchecked")
+  public <T> T fromJson(JsonElement json, Type typeOfT) throws JsonSyntaxException {
+    if (json == null) {
+      return null;
+    }
+    JsonDeserializationContext context = new JsonDeserializationContextDefault(
+        createDefaultObjectNavigatorFactory(deserializationStrategy), deserializers,
+        objectConstructor);
+    T target = (T) context.deserialize(json, typeOfT);
+    return target;
+  }
+
+  /**
+   * Appends the {@link #NULL_STRING} to the {@code writer} object.
+   *
+   * @param writer the object to append the null value to
+   */
+  private void writeOutNullString(Appendable writer) throws IOException {
+    writer.append(NULL_STRING);
+  }
+
+  @Override
+  public String toString() {
+  	StringBuilder sb = new StringBuilder("{")
+  	    .append("serializeNulls:").append(serializeNulls)
+  	    .append(",serializers:").append(serializers)
+  	    .append(",deserializers:").append(deserializers)
+
+      	// using the name instanceCreator instead of ObjectConstructor since the users of Gson are
+      	// more familiar with the concept of Instance Creators. Moreover, the objectConstructor is
+      	// just a utility class around instance creators, and its toString() only displays them.
+        .append(",instanceCreators:").append(objectConstructor)
+        .append("}");
+  	return sb.toString();
+  }
+}

src/com/bukkit/mcteam/gson/GsonBuilder.java

@@ -0,0 +1,570 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+import java.lang.reflect.Type;
+import java.text.DateFormat;
+import java.util.Collection;
+import java.util.Date;
+import java.util.HashSet;
+import java.util.LinkedList;
+import java.util.List;
+
+import com.bukkit.mcteam.gson.DefaultTypeAdapters.DefaultDateTypeAdapter;
+
+/**
+ * <p>Use this builder to construct a {@link Gson} instance when you need to set configuration
+ * options other than the default. For {@link Gson} with default configuration, it is simpler to
+ * use {@code new Gson()}. {@code GsonBuilder} is best used by creating it, and then invoking its
+ * various configuration methods, and finally calling create.</p>
+ *
+ * <p>The following is an example shows how to use the {@code GsonBuilder} to construct a Gson
+ * instance:
+ *
+ * <pre>
+ * Gson gson = new GsonBuilder()
+ *     .registerTypeAdapter(Id.class, new IdTypeAdapter())
+ *     .serializeNulls()
+ *     .setDateFormat(DateFormat.LONG)
+ *     .setFieldNamingPolicy(FieldNamingPolicy.UPPER_CAMEL_CASE)
+ *     .setPrettyPrinting()
+ *     .setVersion(1.0)
+ *     .create();
+ * </pre></p>
+ *
+ * <p>NOTE: the order of invocation of configuration methods does not matter.</p>
+ *
+ * @author Inderjeet Singh
+ * @author Joel Leitch
+ */
+public final class GsonBuilder {
+  private static final InnerClassExclusionStrategy innerClassExclusionStrategy =
+      new InnerClassExclusionStrategy();
+  private static final ExposeAnnotationSerializationExclusionStrategy
+    exposeAnnotationSerializationExclusionStrategy =
+      new ExposeAnnotationSerializationExclusionStrategy();
+  private static final ExposeAnnotationDeserializationExclusionStrategy
+    exposeAnnotationDeserializationExclusionStrategy =
+      new ExposeAnnotationDeserializationExclusionStrategy();
+
+  private final Collection<ExclusionStrategy> exclusionStrategies =
+      new HashSet<ExclusionStrategy>();
+
+  private double ignoreVersionsAfter;
+  private ModifierBasedExclusionStrategy modifierBasedExclusionStrategy;
+  private boolean serializeInnerClasses;
+  private boolean excludeFieldsWithoutExposeAnnotation;
+  private LongSerializationPolicy longSerializationPolicy;
+  private FieldNamingStrategy2 fieldNamingPolicy;
+  private final ParameterizedTypeHandlerMap<InstanceCreator<?>> instanceCreators;
+  private final ParameterizedTypeHandlerMap<JsonSerializer<?>> serializers;
+  private final ParameterizedTypeHandlerMap<JsonDeserializer<?>> deserializers;
+  private boolean serializeNulls;
+  private String datePattern;
+  private int dateStyle;
+  private int timeStyle;
+  private boolean serializeSpecialFloatingPointValues;
+  private boolean escapeHtmlChars;
+  private boolean prettyPrinting;
+  private boolean generateNonExecutableJson;
+
+  /**
+   * Creates a GsonBuilder instance that can be used to build Gson with various configuration
+   * settings. GsonBuilder follows the builder pattern, and it is typically used by first
+   * invoking various configuration methods to set desired options, and finally calling
+   * {@link #create()}.
+   */
+  public GsonBuilder() {
+    // add default exclusion strategies
+    exclusionStrategies.add(Gson.DEFAULT_ANON_LOCAL_CLASS_EXCLUSION_STRATEGY);
+    exclusionStrategies.add(Gson.DEFAULT_SYNTHETIC_FIELD_EXCLUSION_STRATEGY);
+
+    // setup default values
+    ignoreVersionsAfter = VersionConstants.IGNORE_VERSIONS;
+    serializeInnerClasses = true;
+    prettyPrinting = false;
+    escapeHtmlChars = true;
+    modifierBasedExclusionStrategy = Gson.DEFAULT_MODIFIER_BASED_EXCLUSION_STRATEGY;
+    excludeFieldsWithoutExposeAnnotation = false;
+    longSerializationPolicy = LongSerializationPolicy.DEFAULT;
+    fieldNamingPolicy = Gson.DEFAULT_NAMING_POLICY;
+    instanceCreators = new ParameterizedTypeHandlerMap<InstanceCreator<?>>();
+    serializers = new ParameterizedTypeHandlerMap<JsonSerializer<?>>();
+    deserializers = new ParameterizedTypeHandlerMap<JsonDeserializer<?>>();
+    serializeNulls = false;
+    dateStyle = DateFormat.DEFAULT;
+    timeStyle = DateFormat.DEFAULT;
+    serializeSpecialFloatingPointValues = false;
+    generateNonExecutableJson = false;
+  }
+
+  /**
+   * Configures Gson to enable versioning support.
+   *
+   * @param ignoreVersionsAfter any field or type marked with a version higher than this value
+   * are ignored during serialization or deserialization.
+   * @return a reference to this {@code GsonBuilder} object to fulfill the "Builder" pattern
+   */
+  public GsonBuilder setVersion(double ignoreVersionsAfter) {
+    this.ignoreVersionsAfter = ignoreVersionsAfter;
+    return this;
+  }
+
+  /**
+   * Configures Gson to excludes all class fields that have the specified modifiers. By default,
+   * Gson will exclude all fields marked transient or static. This method will override that
+   * behavior.
+   *
+   * @param modifiers the field modifiers. You must use the modifiers specified in the
+   * {@link java.lang.reflect.Modifier} class. For example,
+   * {@link java.lang.reflect.Modifier#TRANSIENT},
+   * {@link java.lang.reflect.Modifier#STATIC}.
+   * @return a reference to this {@code GsonBuilder} object to fulfill the "Builder" pattern
+   */
+  public GsonBuilder excludeFieldsWithModifiers(int... modifiers) {
+    modifierBasedExclusionStrategy = new ModifierBasedExclusionStrategy(modifiers);
+    return this;
+  }
+
+  /**
+   * Makes the output JSON non-executable in Javascript by prefixing the generated JSON with some
+   * special text. This prevents attacks from third-party sites through script sourcing. See
+   * <a href="http://code.google.com/p/google-gson/issues/detail?id=42">Gson Issue 42</a>
+   * for details.
+   *
+   * @return a reference to this {@code GsonBuilder} object to fulfill the "Builder" pattern
+   * @since 1.3
+   */
+  public GsonBuilder generateNonExecutableJson() {
+    this.generateNonExecutableJson = true;
+    return this;
+  }
+
+  /**
+   * Configures Gson to exclude all fields from consideration for serialization or deserialization
+   * that do not have the {@link com.bukkit.mcteam.gson.annotations.Expose} annotation.
+   *
+   * @return a reference to this {@code GsonBuilder} object to fulfill the "Builder" pattern
+   */
+  public GsonBuilder excludeFieldsWithoutExposeAnnotation() {
+    excludeFieldsWithoutExposeAnnotation = true;
+    return this;
+  }
+
+  /**
+   * Configure Gson to serialize null fields. By default, Gson omits all fields that are null
+   * during serialization.
+   *
+   * @return a reference to this {@code GsonBuilder} object to fulfill the "Builder" pattern
+   * @since 1.2
+   */
+  public GsonBuilder serializeNulls() {
+    this.serializeNulls = true;
+    return this;
+  }
+
+  /**
+   * Configures Gson to exclude inner classes during serialization.
+   *
+   * @return a reference to this {@code GsonBuilder} object to fulfill the "Builder" pattern
+   * @since 1.3
+   */
+  public GsonBuilder disableInnerClassSerialization() {
+    serializeInnerClasses = false;
+    return this;
+  }
+
+  /**
+   * Configures Gson to apply a specific serialization policy for {@code Long} and {@code long}
+   * objects.
+   *
+   * @param serializationPolicy the particular policy to use for serializing longs.
+   * @return a reference to this {@code GsonBuilder} object to fulfill the "Builder" pattern
+   * @since 1.3
+   */
+  public GsonBuilder setLongSerializationPolicy(LongSerializationPolicy serializationPolicy) {
+    this.longSerializationPolicy = serializationPolicy;
+    return this;
+  }
+
+  /**
+   * Configures Gson to apply a specific naming policy to an object's field during serialization
+   * and deserialization.
+   *
+   * @param namingConvention the JSON field naming convention to use for serialization and
+   * deserialization.
+   * @return a reference to this {@code GsonBuilder} object to fulfill the "Builder" pattern
+   */
+  public GsonBuilder setFieldNamingPolicy(FieldNamingPolicy namingConvention) {
+    return setFieldNamingStrategy(namingConvention.getFieldNamingPolicy());
+  }
+
+  /**
+   * Configures Gson to apply a specific naming policy strategy to an object's field during
+   * serialization and deserialization.
+   *
+   * @param fieldNamingStrategy the actual naming strategy to apply to the fields
+   * @return a reference to this {@code GsonBuilder} object to fulfill the "Builder" pattern
+   * @since 1.3
+   */
+  public GsonBuilder setFieldNamingStrategy(FieldNamingStrategy fieldNamingStrategy) {
+    return setFieldNamingStrategy(new FieldNamingStrategy2Adapter(fieldNamingStrategy));
+  }
+
+  /**
+   * Configures Gson to apply a specific naming policy strategy to an object's field during
+   * serialization and deserialization.
+   *
+   * @param fieldNamingStrategy the actual naming strategy to apply to the fields
+   * @return a reference to this {@code GsonBuilder} object to fulfill the "Builder" pattern
+   */
+  GsonBuilder setFieldNamingStrategy(FieldNamingStrategy2 fieldNamingStrategy) {
+    this.fieldNamingPolicy =
+        new SerializedNameAnnotationInterceptingNamingPolicy(fieldNamingStrategy);
+    return this;
+  }
+
+  /**
+   * Configures Gson to apply a set of exclusion strategies during both serialization and
+   * deserialization. Each of the {@code strategies} will be applied as a disjunction rule.
+   * This means that if one of the {@code strategies} suggests that a field (or class) should be
+   * skipped then that field (or object) is skipped during serializaiton/deserialization.
+   *
+   * @param strategies the set of strategy object to apply during object (de)serialization.
+   * @return a reference to this {@code GsonBuilder} object to fulfill the "Builder" pattern
+   * @since 1.4
+   */
+  public GsonBuilder setExclusionStrategies(ExclusionStrategy... strategies) {
+    for (ExclusionStrategy strategy : strategies) {
+      exclusionStrategies.add(strategy);
+    }
+    return this;
+  }
+
+  /**
+   * Configures Gson to output Json that fits in a page for pretty printing. This option only
+   * affects Json serialization.
+   *
+   * @return a reference to this {@code GsonBuilder} object to fulfill the "Builder" pattern
+   */
+  public GsonBuilder setPrettyPrinting() {
+    prettyPrinting = true;
+    return this;
+  }
+
+  /**
+   * By default, Gson escapes HTML characters such as &lt; &gt; etc. Use this option to configure
+   * Gson to pass-through HTML characters as is.
+   *
+   * @return a reference to this {@code GsonBuilder} object to fulfill the "Builder" pattern
+   * @since 1.3
+   */
+  public GsonBuilder disableHtmlEscaping() {
+    this.escapeHtmlChars = false;
+    return this;
+  }
+
+  /**
+   * Configures Gson to serialize {@code Date} objects according to the pattern provided. You can
+   * call this method or {@link #setDateFormat(int)} multiple times, but only the last invocation
+   * will be used to decide the serialization format.
+   *
+   * <p>Note that this pattern must abide by the convention provided by {@code SimpleDateFormat}
+   * class. See the documentation in {@link java.text.SimpleDateFormat} for more information on
+   * valid date and time patterns.</p>
+   *
+   * @param pattern the pattern that dates will be serialized/deserialized to/from
+   * @return a reference to this {@code GsonBuilder} object to fulfill the "Builder" pattern
+   * @since 1.2
+   */
+  public GsonBuilder setDateFormat(String pattern) {
+    // TODO(Joel): Make this fail fast if it is an invalid date format
+    this.datePattern = pattern;
+    return this;
+  }
+
+  /**
+   * Configures Gson to to serialize {@code Date} objects according to the style value provided.
+   * You can call this method or {@link #setDateFormat(String)} multiple times, but only the last
+   * invocation will be used to decide the serialization format.
+   *
+   * <p>Note that this style value should be one of the predefined constants in the
+   * {@code DateFormat} class. See the documentation in {@link java.text.DateFormat} for more
+   * information on the valid style constants.</p>
+   *
+   * @param style the predefined date style that date objects will be serialized/deserialized
+   * to/from
+   * @return a reference to this {@code GsonBuilder} object to fulfill the "Builder" pattern
+   * @since 1.2
+   */
+  public GsonBuilder setDateFormat(int style) {
+    this.dateStyle = style;
+    this.datePattern = null;
+    return this;
+  }
+
+  /**
+   * Configures Gson to to serialize {@code Date} objects according to the style value provided.
+   * You can call this method or {@link #setDateFormat(String)} multiple times, but only the last
+   * invocation will be used to decide the serialization format.
+   *
+   * <p>Note that this style value should be one of the predefined constants in the
+   * {@code DateFormat} class. See the documentation in {@link java.text.DateFormat} for more
+   * information on the valid style constants.</p>
+   *
+   * @param dateStyle the predefined date style that date objects will be serialized/deserialized
+   * to/from
+   * @param timeStyle the predefined style for the time portion of the date objects
+   * @return a reference to this {@code GsonBuilder} object to fulfill the "Builder" pattern
+   * @since 1.2
+   */
+  public GsonBuilder setDateFormat(int dateStyle, int timeStyle) {
+    this.dateStyle = dateStyle;
+    this.timeStyle = timeStyle;
+    this.datePattern = null;
+    return this;
+  }
+
+  /**
+   * Configures Gson for custom serialization or deserialization. This method combines the
+   * registration of an {@link InstanceCreator}, {@link JsonSerializer}, and a
+   * {@link JsonDeserializer}. It is best used when a single object {@code typeAdapter} implements
+   * all the required interfaces for custom serialization with Gson. If an instance creator,
+   * serializer or deserializer was previously registered for the specified {@code type}, it is
+   * overwritten.
+   *
+   * @param type the type definition for the type adapter being registered
+   * @param typeAdapter This object must implement at least one of the {@link InstanceCreator},
+   * {@link JsonSerializer}, and a {@link JsonDeserializer} interfaces.
+   * @return a reference to this {@code GsonBuilder} object to fulfill the "Builder" pattern
+   */
+  public GsonBuilder registerTypeAdapter(Type type, Object typeAdapter) {
+    Preconditions.checkArgument(typeAdapter instanceof JsonSerializer<?>
+        || typeAdapter instanceof JsonDeserializer<?> || typeAdapter instanceof InstanceCreator<?>);
+    if (typeAdapter instanceof InstanceCreator<?>) {
+      registerInstanceCreator(type, (InstanceCreator<?>) typeAdapter);
+    }
+    if (typeAdapter instanceof JsonSerializer<?>) {
+      registerSerializer(type, (JsonSerializer<?>) typeAdapter);
+    }
+    if (typeAdapter instanceof JsonDeserializer<?>) {
+      registerDeserializer(type, (JsonDeserializer<?>) typeAdapter);
+    }
+    return this;
+  }
+
+  /**
+   * Configures Gson to use a custom {@link InstanceCreator} for the specified type. If an instance
+   * creator was previously registered for the specified class, it is overwritten. Since this method
+   * takes a type instead of a Class object, it can be used to register a specific handler for a
+   * generic type corresponding to a raw type.
+   *
+   * @param <T> the type for which instance creator is being registered
+   * @param typeOfT The Type definition for T
+   * @param instanceCreator the instance creator for T
+   * @return a reference to this {@code GsonBuilder} object to fulfill the "Builder" pattern
+   */
+  private <T> GsonBuilder registerInstanceCreator(Type typeOfT,
+      InstanceCreator<? extends T> instanceCreator) {
+    instanceCreators.register(typeOfT, instanceCreator);
+    return this;
+  }
+
+  /**
+   * Configures Gson to use a custom JSON serializer for the specified type. You should use this
+   * method if you want to register different serializers for different generic types corresponding
+   * to a raw type.
+   *
+   * @param <T> the type for which the serializer is being registered
+   * @param typeOfT The type definition for T
+   * @param serializer the custom serializer
+   * @return a reference to this {@code GsonBuilder} object to fulfill the "Builder" pattern
+   */
+  private <T> GsonBuilder registerSerializer(Type typeOfT, final JsonSerializer<T> serializer) {
+    serializers.register(typeOfT, serializer);
+    return this;
+  }
+
+  /**
+   * Configures Gson to use a custom JSON deserializer for the specified type. You should use this
+   * method if you want to register different deserializers for different generic types
+   * corresponding to a raw type.
+   *
+   * @param <T> the type for which the deserializer is being registered
+   * @param typeOfT The type definition for T
+   * @param deserializer the custom deserializer
+   * @return a reference to this {@code GsonBuilder} object to fulfill the "Builder" pattern
+   */
+  private <T> GsonBuilder registerDeserializer(Type typeOfT, JsonDeserializer<T> deserializer) {
+    deserializers.register(typeOfT, new JsonDeserializerExceptionWrapper<T>(deserializer));
+    return this;
+  }
+
+  /**
+   * Configures Gson for custom serialization or deserialization for an inheritance type hierarchy.
+   * This method combines the registration of an {@link InstanceCreator}, {@link JsonSerializer},
+   * and a {@link JsonDeserializer}. It is best used when a single object {@code typeAdapter}
+   * implements all the required interfaces for custom serialization with Gson.
+   * If an instance creator, serializer or deserializer was previously registered for the specified
+   * type hierarchy, it is overwritten. If an instance creator, serializer or deserializer is
+   * registered for a specific type in the type hierarchy, it will be invoked instead of the one
+   * registered for the type hierarchy.
+   *
+   * @param baseType the class definition for the type adapter being registered for the base class
+   *        or interface
+   * @param typeAdapter This object must implement at least one of the {@link InstanceCreator},
+   * {@link JsonSerializer}, and a {@link JsonDeserializer} interfaces.
+   * @return a reference to this {@code GsonBuilder} object to fulfill the "Builder" pattern
+   * @since 1.7
+   */
+  GsonBuilder registerTypeHierarchyAdapter(Class<?> baseType, Object typeAdapter) {
+    Preconditions.checkArgument(typeAdapter instanceof JsonSerializer<?>
+    || typeAdapter instanceof JsonDeserializer<?> || typeAdapter instanceof InstanceCreator<?>);
+    if (typeAdapter instanceof InstanceCreator<?>) {
+      registerInstanceCreatorForTypeHierarchy(baseType, (InstanceCreator<?>) typeAdapter);
+    }
+    if (typeAdapter instanceof JsonSerializer<?>) {
+      registerSerializerForTypeHierarchy(baseType, (JsonSerializer<?>) typeAdapter);
+    }
+    if (typeAdapter instanceof JsonDeserializer<?>) {
+      registerDeserializerForTypeHierarchy(baseType, (JsonDeserializer<?>) typeAdapter);
+    }
+    return this;
+  }
+
+  private <T> GsonBuilder registerInstanceCreatorForTypeHierarchy(Class<?> classOfT,
+      InstanceCreator<? extends T> instanceCreator) {
+    instanceCreators.registerForTypeHierarchy(classOfT, instanceCreator);
+    return this;
+  }
+
+  private <T> GsonBuilder registerSerializerForTypeHierarchy(Class<?> classOfT,
+      final JsonSerializer<T> serializer) {
+    serializers.registerForTypeHierarchy(classOfT, serializer);
+    return this;
+  }
+
+  private <T> GsonBuilder registerDeserializerForTypeHierarchy(Class<?> classOfT,
+      JsonDeserializer<T> deserializer) {
+    deserializers.registerForTypeHierarchy(classOfT,
+        new JsonDeserializerExceptionWrapper<T>(deserializer));
+    return this;
+  }
+
+  /**
+   * Section 2.4 of <a href="http://www.ietf.org/rfc/rfc4627.txt">JSON specification</a> disallows
+   * special double values (NaN, Infinity, -Infinity). However,
+   * <a href="http://www.ecma-international.org/publications/files/ECMA-ST/Ecma-262.pdf">Javascript
+   * specification</a> (see section 4.3.20, 4.3.22, 4.3.23) allows these values as valid Javascript
+   * values. Moreover, most JavaScript engines will accept these special values in JSON without
+   * problem. So, at a practical level, it makes sense to accept these values as valid JSON even
+   * though JSON specification disallows them.
+   *
+   * <p>Gson always accepts these special values during deserialization. However, it outputs
+   * strictly compliant JSON. Hence, if it encounters a float value {@link Float#NaN},
+   * {@link Float#POSITIVE_INFINITY}, {@link Float#NEGATIVE_INFINITY}, or a double value
+   * {@link Double#NaN}, {@link Double#POSITIVE_INFINITY}, {@link Double#NEGATIVE_INFINITY}, it
+   * will throw an {@link IllegalArgumentException}. This method provides a way to override the
+   * default behavior when you know that the JSON receiver will be able to handle these special
+   * values.
+   *
+   * @return a reference to this {@code GsonBuilder} object to fulfill the "Builder" pattern
+   * @since 1.3
+   */
+  public GsonBuilder serializeSpecialFloatingPointValues() {
+    this.serializeSpecialFloatingPointValues = true;
+    return this;
+  }
+
+  /**
+   * Creates a {@link Gson} instance based on the current configuration. This method is free of
+   * side-effects to this {@code GsonBuilder} instance and hence can be called multiple times.
+   *
+   * @return an instance of Gson configured with the options currently set in this builder
+   */
+  public Gson create() {
+    List<ExclusionStrategy> serializationStrategies =
+        new LinkedList<ExclusionStrategy>(exclusionStrategies);
+    List<ExclusionStrategy> deserializationStrategies =
+        new LinkedList<ExclusionStrategy>(exclusionStrategies);
+
+    serializationStrategies.add(modifierBasedExclusionStrategy);
+    deserializationStrategies.add(modifierBasedExclusionStrategy);
+
+    if (!serializeInnerClasses) {
+      serializationStrategies.add(innerClassExclusionStrategy);
+      deserializationStrategies.add(innerClassExclusionStrategy);
+    }
+    if (ignoreVersionsAfter != VersionConstants.IGNORE_VERSIONS) {
+      serializationStrategies.add(new VersionExclusionStrategy(ignoreVersionsAfter));
+      deserializationStrategies.add(new VersionExclusionStrategy(ignoreVersionsAfter));
+    }
+    if (excludeFieldsWithoutExposeAnnotation) {
+      serializationStrategies.add(exposeAnnotationSerializationExclusionStrategy);
+      deserializationStrategies.add(exposeAnnotationDeserializationExclusionStrategy);
+    }
+    ExclusionStrategy serializationExclusionStrategy =
+      new DisjunctionExclusionStrategy(serializationStrategies);
+    ExclusionStrategy deserializationExclusionStrategy =
+      new DisjunctionExclusionStrategy(deserializationStrategies);
+
+    ParameterizedTypeHandlerMap<JsonSerializer<?>> customSerializers = serializers.copyOf();
+    ParameterizedTypeHandlerMap<JsonDeserializer<?>> customDeserializers = deserializers.copyOf();
+    addTypeAdaptersForDate(datePattern, dateStyle, timeStyle, customSerializers,
+        customDeserializers);
+
+    customSerializers.registerIfAbsent(DefaultTypeAdapters.getDefaultSerializers(
+        serializeSpecialFloatingPointValues, longSerializationPolicy));
+
+    customDeserializers.registerIfAbsent(DefaultTypeAdapters.getDefaultDeserializers());
+
+    ParameterizedTypeHandlerMap<InstanceCreator<?>> customInstanceCreators =
+        instanceCreators.copyOf();
+    customInstanceCreators.registerIfAbsent(DefaultTypeAdapters.getDefaultInstanceCreators());
+
+    customSerializers.makeUnmodifiable();
+    customDeserializers.makeUnmodifiable();
+    instanceCreators.makeUnmodifiable();
+
+    MappedObjectConstructor objConstructor = new MappedObjectConstructor(customInstanceCreators);
+
+    Gson gson = new Gson(serializationExclusionStrategy, deserializationExclusionStrategy,
+        fieldNamingPolicy, objConstructor, serializeNulls, customSerializers,
+        customDeserializers, generateNonExecutableJson, escapeHtmlChars, prettyPrinting);
+    return gson;
+  }
+
+  private static void addTypeAdaptersForDate(String datePattern, int dateStyle, int timeStyle,
+      ParameterizedTypeHandlerMap<JsonSerializer<?>> serializers,
+      ParameterizedTypeHandlerMap<JsonDeserializer<?>> deserializers) {
+    DefaultDateTypeAdapter dateTypeAdapter = null;
+    if (datePattern != null && !"".equals(datePattern.trim())) {
+      dateTypeAdapter = new DefaultDateTypeAdapter(datePattern);
+    } else if (dateStyle != DateFormat.DEFAULT && timeStyle != DateFormat.DEFAULT) {
+      dateTypeAdapter = new DefaultDateTypeAdapter(dateStyle, timeStyle);
+    }
+
+    if (dateTypeAdapter != null) {
+      if (!serializers.hasSpecificHandlerFor(Date.class)) {
+        serializers.register(Date.class, dateTypeAdapter);
+      }
+      if (!deserializers.hasSpecificHandlerFor(Date.class)) {
+        deserializers.register(Date.class, dateTypeAdapter);
+      }
+    }
+  }
+}

src/com/bukkit/mcteam/gson/InnerClassExclusionStrategy.java

@@ -0,0 +1,43 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+import java.lang.reflect.Modifier;
+
+/**
+ * Strategy for excluding inner classes.
+ *
+ * @author Joel Leitch
+ */
+class InnerClassExclusionStrategy implements ExclusionStrategy {
+
+  public boolean shouldSkipField(FieldAttributes f) {
+    return isInnerClass(f.getDeclaredClass());
+  }
+
+  public boolean shouldSkipClass(Class<?> clazz) {
+    return isInnerClass(clazz);
+  }
+
+  private boolean isInnerClass(Class<?> clazz) {
+    return clazz.isMemberClass() && !isStatic(clazz);
+  }
+
+  private boolean isStatic(Class<?> clazz) {
+    return (clazz.getModifiers() & Modifier.STATIC) != 0;
+  }
+}

src/com/bukkit/mcteam/gson/InstanceCreator.java

@@ -0,0 +1,92 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+import java.lang.reflect.Type;
+
+/**
+ * This interface is implemented to create instances of a class that does not define a no-args
+ * constructor. If you can modify the class, you should instead add a private, or public
+ * no-args constructor. However, that is not possible for library classes, such as JDK classes, or
+ * a third-party library that you do not have source-code of. In such cases, you should define an
+ * instance creator for the class. Implementations of this interface should be registered with
+ * {@link GsonBuilder#registerTypeAdapter(Type, Object)} method before Gson will be able to use
+ * them.
+ * <p>Let us look at an example where defining an InstanceCreator might be useful. The
+ * {@code Id} class defined below does not have a default no-args constructor.</p>
+ *
+ * <pre>
+ * public class Id&lt;T&gt; {
+ *   private final Class&lt;T&gt; clazz;
+ *   private final long value;
+ *   public Id(Class&lt;T&gt; clazz, long value) {
+ *     this.clazz = clazz;
+ *     this.value = value;
+ *   }
+ * }
+ * </pre>
+ *
+ * <p>If Gson encounters an object of type {@code Id} during deserialization, it will throw an
+ * exception. The easiest way to solve this problem will be to add a (public or private) no-args
+ * constructor as follows:</p>
+ *
+ * <pre>
+ * private Id() {
+ *   this(Object.class, 0L);
+ * }
+ * </pre>
+ *
+ * <p>However, let us assume that the developer does not have access to the source-code of the
+ * {@code Id} class, or does not want to define a no-args constructor for it. The developer
+ * can solve this problem by defining an {@code InstanceCreator} for {@code Id}:</p>
+ *
+ * <pre>
+ * class IdInstanceCreator implements InstanceCreator&lt;Id&gt; {
+ *   public Id createInstance(Type type) {
+ *     return new Id(Object.class, 0L);
+ *   }
+ * }
+ * </pre>
+ *
+ * <p>Note that it does not matter what the fields of the created instance contain since Gson will
+ * overwrite them with the deserialized values specified in Json. You should also ensure that a
+ * <i>new</i> object is returned, not a common object since its fields will be overwritten.
+ * The developer will need to register {@code IdInstanceCreator} with Gson as follows:</p>
+ *
+ * <pre>
+ * Gson gson = new GsonBuilder().registerTypeAdapter(Id.class, new IdInstanceCreator()).create();
+ * </pre>
+ *
+ * @param <T> the type of object that will be created by this implementation.
+ *
+ * @author Inderjeet Singh
+ * @author Joel Leitch
+ */
+public interface InstanceCreator<T> {
+
+  /**
+   * Gson invokes this call-back method during deserialization to create an instance of the
+   * specified type. The fields of the returned instance are overwritten with the data present
+   * in the Json. Since the prior contents of the object are destroyed and overwritten, do not
+   * return an instance that is useful elsewhere. In particular, do not return a common instance,
+   * always use {@code new} to create a new instance.
+   *
+   * @param type the parameterized T represented as a {@link Type}.
+   * @return a default object instance of type T.
+   */
+  public T createInstance(Type type);
+}

src/com/bukkit/mcteam/gson/JavaFieldNamingPolicy.java

@@ -0,0 +1,51 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+import java.lang.annotation.Annotation;
+import java.lang.reflect.Type;
+import java.util.Collection;
+
+/**
+ * A simple implementation of the {@link FieldNamingStrategy2} interface such that it does not
+ * perform any string translation of the incoming field name.
+ *
+ * <p>The following is an example:</p>
+ *
+ * <pre>
+ * class IntWrapper {
+ *   public int integerField = 0;
+ * }
+ *
+ * JavaFieldNamingPolicy policy = new JavaFieldNamingPolicy();
+ * String translatedFieldName =
+ *     policy.translateName(IntWrapper.class.getField("integerField"));
+ *
+ * assert("integerField".equals(translatedFieldName));
+ * </pre>
+ *
+ * <p>This is the default {@link FieldNamingStrategy2} used by Gson.</p>
+ *
+ * @author Joel Leitch
+ */
+final class JavaFieldNamingPolicy extends RecursiveFieldNamingPolicy {
+
+  @Override
+  protected String translateName(String target, Type fieldType, Collection<Annotation> annotations) {
+    return target;
+  }
+}

src/com/bukkit/mcteam/gson/JsonArray.java

@@ -0,0 +1,312 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+import java.io.IOException;
+import java.math.BigDecimal;
+import java.math.BigInteger;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Iterator;
+import java.util.List;
+
+/**
+ * A class representing an array type in Json. An array is a list of {@link JsonElement}s each of
+ * which can be of a different type. This is an ordered list, meaning that the order in which
+ * elements are added is preserved.
+ *
+ * @author Inderjeet Singh
+ * @author Joel Leitch
+ */
+public final class JsonArray extends JsonElement implements Iterable<JsonElement> {
+  private final List<JsonElement> elements;
+
+  /**
+   * Creates an empty JsonArray.
+   */
+  public JsonArray() {
+    elements = new ArrayList<JsonElement>();
+  }
+
+  /**
+   * Adds the specified element to self.
+   *
+   * @param element the element that needs to be added to the array.
+   */
+  public void add(JsonElement element) {
+    if (element == null) {
+      element = JsonNull.createJsonNull();
+    }
+    elements.add(element);
+  }
+
+  /**
+   * Adds all the elements of the specified array to self.
+   *
+   * @param array the array whose elements need to be added to the array.
+   */
+  public void addAll(JsonArray array) {
+    elements.addAll(array.elements);
+  }
+
+  /**
+   * Reverses the elements of the array.
+   */
+  void reverse() {
+    Collections.reverse(elements);
+  }
+
+  /**
+   * Returns the number of elements in the array.
+   *
+   * @return the number of elements in the array.
+   */
+  public int size() {
+    return elements.size();
+  }
+
+  /**
+   * Returns an iterator to navigate the elemetns of the array. Since the array is an ordered list,
+   * the iterator navigates the elements in the order they were inserted.
+   *
+   * @return an iterator to navigate the elements of the array.
+   */
+  public Iterator<JsonElement> iterator() {
+    return elements.iterator();
+  }
+
+  /**
+   * Returns the ith element of the array.
+   *
+   * @param i the index of the element that is being sought.
+   * @return the element present at the ith index.
+   * @throws IndexOutOfBoundsException if i is negative or greater than or equal to the
+   * {@link #size()} of the array.
+   */
+  public JsonElement get(int i) {
+    return elements.get(i);
+  }
+
+  /**
+   * convenience method to get this array as a {@link Number} if it contains a single element.
+   *
+   * @return get this element as a number if it is single element array.
+   * @throws ClassCastException if the element in the array is of not a {@link JsonPrimitive} and
+   * is not a valid Number.
+   * @throws IllegalStateException if the array has more than one element.
+   */
+  @Override
+  public Number getAsNumber() {
+    if (elements.size() == 1) {
+      return elements.get(0).getAsNumber();
+    }
+    throw new IllegalStateException();
+  }
+
+  /**
+   * convenience method to get this array as a {@link String} if it contains a single element.
+   *
+   * @return get this element as a String if it is single element array.
+   * @throws ClassCastException if the element in the array is of not a {@link JsonPrimitive} and
+   * is not a valid String.
+   * @throws IllegalStateException if the array has more than one element.
+   */
+  @Override
+  public String getAsString() {
+    if (elements.size() == 1) {
+      return elements.get(0).getAsString();
+    }
+    throw new IllegalStateException();
+  }
+
+  /**
+   * convenience method to get this array as a double if it contains a single element.
+   *
+   * @return get this element as a double if it is single element array.
+   * @throws ClassCastException if the element in the array is of not a {@link JsonPrimitive} and
+   * is not a valid double.
+   * @throws IllegalStateException if the array has more than one element.
+   */
+  @Override
+  public double getAsDouble() {
+    if (elements.size() == 1) {
+      return elements.get(0).getAsDouble();
+    }
+    throw new IllegalStateException();
+  }
+
+  /**
+   * convenience method to get this array as a {@link BigDecimal} if it contains a single element.
+   *
+   * @return get this element as a {@link BigDecimal} if it is single element array.
+   * @throws ClassCastException if the element in the array is of not a {@link JsonPrimitive}.
+   * @throws NumberFormatException if the element at index 0 is not a valid {@link BigDecimal}.
+   * @throws IllegalStateException if the array has more than one element.
+   * @since 1.2
+   */
+  @Override
+  public BigDecimal getAsBigDecimal() {
+    if (elements.size() == 1) {
+      return elements.get(0).getAsBigDecimal();
+    }
+    throw new IllegalStateException();
+  }
+
+  /**
+   * convenience method to get this array as a {@link BigInteger} if it contains a single element.
+   *
+   * @return get this element as a {@link BigInteger} if it is single element array.
+   * @throws ClassCastException if the element in the array is of not a {@link JsonPrimitive}.
+   * @throws NumberFormatException if the element at index 0 is not a valid {@link BigInteger}.
+   * @throws IllegalStateException if the array has more than one element.
+   * @since 1.2
+   */
+  @Override
+  public BigInteger getAsBigInteger() {
+    if (elements.size() == 1) {
+      return elements.get(0).getAsBigInteger();
+    }
+    throw new IllegalStateException();
+  }
+
+  /**
+   * convenience method to get this array as a float if it contains a single element.
+   *
+   * @return get this element as a float if it is single element array.
+   * @throws ClassCastException if the element in the array is of not a {@link JsonPrimitive} and
+   * is not a valid float.
+   * @throws IllegalStateException if the array has more than one element.
+   */
+  @Override
+  public float getAsFloat() {
+    if (elements.size() == 1) {
+      return elements.get(0).getAsFloat();
+    }
+    throw new IllegalStateException();
+  }
+
+  /**
+   * convenience method to get this array as a long if it contains a single element.
+   *
+   * @return get this element as a long if it is single element array.
+   * @throws ClassCastException if the element in the array is of not a {@link JsonPrimitive} and
+   * is not a valid long.
+   * @throws IllegalStateException if the array has more than one element.
+   */
+  @Override
+  public long getAsLong() {
+    if (elements.size() == 1) {
+      return elements.get(0).getAsLong();
+    }
+    throw new IllegalStateException();
+  }
+
+  /**
+   * convenience method to get this array as an integer if it contains a single element.
+   *
+   * @return get this element as an integer if it is single element array.
+   * @throws ClassCastException if the element in the array is of not a {@link JsonPrimitive} and
+   * is not a valid integer.
+   * @throws IllegalStateException if the array has more than one element.
+   */
+  @Override
+  public int getAsInt() {
+    if (elements.size() == 1) {
+      return elements.get(0).getAsInt();
+    }
+    throw new IllegalStateException();
+  }
+
+  @Override
+  public byte getAsByte() {
+    if (elements.size() == 1) {
+      return elements.get(0).getAsByte();
+    }
+    throw new IllegalStateException();
+  }
+
+  @Override
+  public char getAsCharacter() {
+    if (elements.size() == 1) {
+      return elements.get(0).getAsCharacter();
+    }
+    throw new IllegalStateException();
+  }
+
+  /**
+   * convenience method to get this array as a primitive short if it contains a single element.
+   *
+   * @return get this element as a primitive short if it is single element array.
+   * @throws ClassCastException if the element in the array is of not a {@link JsonPrimitive} and
+   * is not a valid short.
+   * @throws IllegalStateException if the array has more than one element.
+   */
+  @Override
+  public short getAsShort() {
+    if (elements.size() == 1) {
+      return elements.get(0).getAsShort();
+    }
+    throw new IllegalStateException();
+  }
+
+  /**
+   * convenience method to get this array as a boolean if it contains a single element.
+   *
+   * @return get this element as a boolean if it is single element array.
+   * @throws ClassCastException if the element in the array is of not a {@link JsonPrimitive} and
+   * is not a valid boolean.
+   * @throws IllegalStateException if the array has more than one element.
+   */
+  @Override
+  public boolean getAsBoolean() {
+    if (elements.size() == 1) {
+      return elements.get(0).getAsBoolean();
+    }
+    throw new IllegalStateException();
+  }
+
+  /**
+   * convenience method to get this array as an Object if it contains a single element.
+   *
+   * @return get this element as an Object if it is single element array.
+   * @throws ClassCastException if the element in the array is of not a {@link JsonPrimitive} and
+   * is not a valid Object.
+   * @throws IllegalStateException if the array has more than one element.
+   */
+  @Override
+  Object getAsObject() {
+    if (elements.size() == 1) {
+      return elements.get(0).getAsObject();
+    }
+    throw new IllegalStateException();
+  }
+
+  @Override
+  protected void toString(Appendable sb, Escaper escaper) throws IOException {
+    sb.append('[');
+    boolean first = true;
+    for (JsonElement element : elements) {
+      if (first) {
+        first = false;
+      } else {
+        sb.append(',');
+      }
+      element.toString(sb, escaper);
+    }
+    sb.append(']');
+  }
+}

src/com/bukkit/mcteam/gson/JsonArrayDeserializationVisitor.java

@@ -0,0 +1,112 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+import java.lang.reflect.Array;
+import java.lang.reflect.Type;
+
+/**
+ * A visitor that populates fields of an object with data from its equivalent
+ * JSON representation
+ *
+ * @author Inderjeet Singh
+ * @author Joel Leitch
+ */
+final class JsonArrayDeserializationVisitor<T> extends JsonDeserializationVisitor<T> {
+
+  JsonArrayDeserializationVisitor(JsonArray jsonArray, Type arrayType,
+      ObjectNavigatorFactory factory, ObjectConstructor objectConstructor,
+      ParameterizedTypeHandlerMap<JsonDeserializer<?>> deserializers,
+      JsonDeserializationContext context) {
+    super(jsonArray, arrayType, factory, objectConstructor, deserializers, context);
+  }
+
+  @Override
+  @SuppressWarnings("unchecked")
+  protected T constructTarget() {
+
+    TypeInfo typeInfo = new TypeInfo(targetType);
+
+    if (!json.isJsonArray()) {
+      throw new JsonParseException("Expecting array found: " + json); 
+    }
+    JsonArray jsonArray = json.getAsJsonArray();
+    if (typeInfo.isArray()) {
+      TypeInfoArray arrayTypeInfo = TypeInfoFactory.getTypeInfoForArray(targetType);
+      // We know that we are getting back an array of the required type, so
+      // this typecasting is safe.
+      return (T) objectConstructor.constructArray(arrayTypeInfo.getSecondLevelType(),
+          jsonArray.size());
+    }
+    // is a collection
+    return (T) objectConstructor.construct(typeInfo.getRawClass());
+  }
+
+  public void visitArray(Object array, Type arrayType) {
+    if (!json.isJsonArray()) {
+      throw new JsonParseException("Expecting array found: " + json); 
+    }
+    JsonArray jsonArray = json.getAsJsonArray();
+    TypeInfoArray arrayTypeInfo = TypeInfoFactory.getTypeInfoForArray(arrayType);
+    for (int i = 0; i < jsonArray.size(); i++) {
+      JsonElement jsonChild = jsonArray.get(i);
+      Object child;
+
+      if (jsonChild == null || jsonChild.isJsonNull()) {
+        child = null;
+      } else if (jsonChild instanceof JsonObject) {
+        child = visitChildAsObject(arrayTypeInfo.getComponentRawType(), jsonChild);
+      } else if (jsonChild instanceof JsonArray) {
+        child = visitChildAsArray(arrayTypeInfo.getSecondLevelType(), jsonChild.getAsJsonArray());
+      } else if (jsonChild instanceof JsonPrimitive) {
+        child = visitChildAsObject(arrayTypeInfo.getComponentRawType(),
+            jsonChild.getAsJsonPrimitive());
+      } else {
+        throw new IllegalStateException();
+      }
+      Array.set(array, i, child);
+    }
+  }
+
+  // We should not implement any other method from Visitor interface since
+  // all other methods should be invoked on JsonObjectDeserializationVisitor
+  // instead.
+
+  public void startVisitingObject(Object node) {
+    throw new JsonParseException("Expecting array but found object: " + node);
+  }
+
+  public void visitArrayField(FieldAttributes f, Type typeOfF, Object obj) {
+    throw new JsonParseException("Expecting array but found array field " + f.getName() + ": "
+        + obj);
+  }
+
+  public void visitObjectField(FieldAttributes f, Type typeOfF, Object obj) {
+    throw new JsonParseException("Expecting array but found object field " + f.getName() + ": " 
+        + obj);
+  }
+
+  public boolean visitFieldUsingCustomHandler(FieldAttributes f, Type actualTypeOfField, Object parent) {
+    throw new JsonParseException("Expecting array but found field " + f.getName() + ": " 
+        + parent);
+  }
+
+  public void visitPrimitive(Object primitive) {
+    throw new JsonParseException(
+        "Type information is unavailable, and the target is not a primitive: " + json);
+  }
+}

src/com/bukkit/mcteam/gson/JsonDeserializationContext.java

@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+import java.lang.reflect.Type;
+
+/**
+ * Context for deserialization that is passed to a custom deserializer during invocation of its 
+ * {@link JsonDeserializer#deserialize(JsonElement, Type, JsonDeserializationContext)}
+ * method. 
+ * 
+ * @author Inderjeet Singh
+ * @author Joel Leitch
+ */
+public interface JsonDeserializationContext {
+  
+  /**
+   * Invokes default deserialization on the specified object. It should never be invoked on 
+   * the element received as a parameter of the 
+   * {@link JsonDeserializer#deserialize(JsonElement, Type, JsonDeserializationContext)} method. Doing
+   * so will result in an infinite loop since Gson will in-turn call the custom deserializer again. 
+
+   * @param json the parse tree.
+   * @param typeOfT type of the expected return value.
+   * @param <T> The type of the deserialized object.
+   * @return An object of type typeOfT.
+   * @throws JsonParseException if the parse tree does not contain expected data.
+   */
+  public <T> T deserialize(JsonElement json, Type typeOfT) throws JsonParseException;
+}

src/com/bukkit/mcteam/gson/JsonDeserializationContextDefault.java

@@ -0,0 +1,88 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+import java.lang.reflect.Type;
+
+/**
+ * implementation of a deserialization context for Gson
+ *
+ * @author Inderjeet Singh
+ */
+final class JsonDeserializationContextDefault implements JsonDeserializationContext {
+
+  private final ObjectNavigatorFactory navigatorFactory;
+  private final ParameterizedTypeHandlerMap<JsonDeserializer<?>> deserializers;
+  private final MappedObjectConstructor objectConstructor;
+
+  JsonDeserializationContextDefault(ObjectNavigatorFactory navigatorFactory,
+      ParameterizedTypeHandlerMap<JsonDeserializer<?>> deserializers,
+      MappedObjectConstructor objectConstructor) {
+    this.navigatorFactory = navigatorFactory;
+    this.deserializers = deserializers;
+    this.objectConstructor = objectConstructor;
+  }
+
+  ObjectConstructor getObjectConstructor() {
+    return objectConstructor;
+  }
+
+  @SuppressWarnings("unchecked")
+  public <T> T deserialize(JsonElement json, Type typeOfT) throws JsonParseException {
+    if (json == null || json.isJsonNull()) {
+      return null;
+    } else if (json.isJsonArray()) {
+      return (T) fromJsonArray(typeOfT, json.getAsJsonArray(), this);
+    } else if (json.isJsonObject()) {
+      return (T) fromJsonObject(typeOfT, json.getAsJsonObject(), this);
+    } else if (json.isJsonPrimitive()) {
+      return (T) fromJsonPrimitive(typeOfT, json.getAsJsonPrimitive(), this);
+    } else {
+      throw new JsonParseException("Failed parsing JSON source: " + json + " to Json");
+    }
+  }
+
+  private <T> T fromJsonArray(Type arrayType, JsonArray jsonArray,
+      JsonDeserializationContext context) throws JsonParseException {
+    JsonArrayDeserializationVisitor<T> visitor = new JsonArrayDeserializationVisitor<T>(
+        jsonArray, arrayType, navigatorFactory, objectConstructor, deserializers, context);
+    ObjectNavigator on = navigatorFactory.create(new ObjectTypePair(null, arrayType, true));
+    on.accept(visitor);
+    return visitor.getTarget();
+  }
+
+  private <T> T fromJsonObject(Type typeOfT, JsonObject jsonObject,
+      JsonDeserializationContext context) throws JsonParseException {
+    JsonObjectDeserializationVisitor<T> visitor = new JsonObjectDeserializationVisitor<T>(
+        jsonObject, typeOfT, navigatorFactory, objectConstructor, deserializers, context);
+    ObjectNavigator on = navigatorFactory.create(new ObjectTypePair(null, typeOfT, true));
+    on.accept(visitor);
+    return visitor.getTarget();
+  }
+
+  @SuppressWarnings("unchecked")
+  private <T> T fromJsonPrimitive(Type typeOfT, JsonPrimitive json,
+      JsonDeserializationContext context) throws JsonParseException {
+    JsonObjectDeserializationVisitor<T> visitor = new JsonObjectDeserializationVisitor<T>(
+        json, typeOfT, navigatorFactory, objectConstructor, deserializers, context);
+    ObjectNavigator on = 
+      navigatorFactory.create(new ObjectTypePair(json.getAsObject(), typeOfT, true));
+    on.accept(visitor);
+    Object target = visitor.getTarget();
+    return (T) target;
+  }
+}

src/com/bukkit/mcteam/gson/JsonDeserializationVisitor.java

@@ -0,0 +1,112 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+import java.lang.reflect.Type;
+
+/**
+ * Abstract data value container for the {@link ObjectNavigator.Visitor}
+ * implementations.  This class exposes the {@link #getTarget()} method
+ * which returns the class that was visited by this object.
+ *
+ * @author Inderjeet Singh
+ * @author Joel Leitch
+ */
+abstract class JsonDeserializationVisitor<T> implements ObjectNavigator.Visitor {
+
+  protected final ObjectNavigatorFactory factory;
+  protected final ObjectConstructor objectConstructor;
+  protected final ParameterizedTypeHandlerMap<JsonDeserializer<?>> deserializers;
+  protected T target;
+  protected final JsonElement json;
+  protected final Type targetType;
+  protected final JsonDeserializationContext context;
+  protected boolean constructed;
+
+  public JsonDeserializationVisitor(JsonElement json, Type targetType,
+      ObjectNavigatorFactory factory, ObjectConstructor objectConstructor,
+      ParameterizedTypeHandlerMap<JsonDeserializer<?>> deserializers,
+      JsonDeserializationContext context) {
+    Preconditions.checkNotNull(json);
+    this.targetType = targetType;
+    this.factory = factory;
+    this.objectConstructor = objectConstructor;
+    this.deserializers = deserializers;
+    this.json = json;
+    this.context = context;
+    this.constructed = false;
+  }
+
+  public T getTarget() {
+    if (!constructed) {
+      target = constructTarget();
+      constructed = true;
+    }
+    return target;
+  }
+
+  protected abstract T constructTarget();
+
+  public void start(ObjectTypePair node) {
+  }
+
+  public void end(ObjectTypePair node) {
+  }
+
+  @SuppressWarnings("unchecked")
+  public final boolean visitUsingCustomHandler(ObjectTypePair objTypePair) {
+    Pair<JsonDeserializer<?>, ObjectTypePair> pair = objTypePair.getMatchingHandler(deserializers);
+    if (pair == null) {
+      return false;
+    }    
+    Object value = invokeCustomDeserializer(json, pair);
+    target = (T) value;
+    constructed = true;
+    return true;
+  }
+
+  protected Object invokeCustomDeserializer(JsonElement element, 
+      Pair<JsonDeserializer<?>, ObjectTypePair> pair) {
+    if (element == null || element.isJsonNull()) {
+      return null;
+    }
+    Type objType = pair.second.type;
+    return (pair.first).deserialize(element, objType, context);
+  }
+
+  final Object visitChildAsObject(Type childType, JsonElement jsonChild) {
+    JsonDeserializationVisitor<?> childVisitor =
+        new JsonObjectDeserializationVisitor<Object>(jsonChild, childType,
+            factory, objectConstructor, deserializers, context);
+    return visitChild(childType, childVisitor);
+  }
+
+  final Object visitChildAsArray(Type childType, JsonArray jsonChild) {
+    JsonDeserializationVisitor<?> childVisitor =
+        new JsonArrayDeserializationVisitor<Object>(jsonChild.getAsJsonArray(), childType,
+            factory, objectConstructor, deserializers, context);
+    return visitChild(childType, childVisitor);
+  }
+
+  private Object visitChild(Type type, JsonDeserializationVisitor<?> childVisitor) {
+    ObjectNavigator on = factory.create(new ObjectTypePair(null, type, false));
+    on.accept(childVisitor);
+    // the underlying object may have changed during the construction phase
+    // This happens primarily because of custom deserializers
+    return childVisitor.getTarget();
+  }
+}

src/com/bukkit/mcteam/gson/JsonDeserializer.java

@@ -0,0 +1,88 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+import java.lang.reflect.Type;
+
+/**
+ * <p>Interface representing a custom deserializer for Json. You should write a custom
+ * deserializer, if you are not happy with the default deserialization done by Gson. You will
+ * also need to register this deserializer through
+ * {@link GsonBuilder#registerTypeAdapter(Type, Object)}.</p>
+ *
+ * <p>Let us look at example where defining a deserializer will be useful. The {@code Id} class
+ * defined below has two fields: {@code clazz} and {@code value}.</p>
+ *
+ * <pre>
+ * public class Id&lt;T&gt; {
+ *   private final Class&lt;T&gt; clazz;
+ *   private final long value;
+ *   public Id(Class&lt;T&gt; clazz, long value) {
+ *     this.clazz = clazz;
+ *     this.value = value;
+ *   }
+ *   public long getValue() {
+ *     return value;
+ *   }
+ * }
+ * </pre>
+ *
+ * <p>The default deserialization of {@code Id(com.foo.MyObject.class, 20L)} will require the
+ * Json string to be <code>{"clazz":com.foo.MyObject,"value":20}</code>. Suppose, you already know
+ * the type of the field that the {@code Id} will be deserialized into, and hence just want to
+ * deserialize it from a Json string {@code 20}. You can achieve that by writing a custom
+ * deserializer:</p>
+ *
+ * <pre>
+ * class IdDeserializer implements JsonDeserializer&lt;Id&gt;() {
+ *   public Id fromJson(JsonElement json, Type typeOfT, JsonDeserializationContext context)
+ *       throws JsonParseException {
+ *     return (Id) new Id((Class)typeOfT, id.getValue());
+ *   }
+ * </pre>
+ *
+ * <p>You will also need to register {@code IdDeserializer} with Gson as follows:</p>
+ *
+ * <pre>
+ * Gson gson = new GsonBuilder().registerTypeAdapter(Id.class, new IdDeserializer()).create();
+ * </pre>
+ *
+ * @author Inderjeet Singh
+ * @author Joel Leitch
+ *
+ * @param <T> type for which the deserializer is being registered. It is possible that a
+ * deserializer may be asked to deserialize a specific generic type of the T.
+ */
+public interface JsonDeserializer<T> {
+
+  /**
+   * Gson invokes this call-back method during deserialization when it encounters a field of the
+   * specified type.
+   * <p>In the implementation of this call-back method, you should consider invoking
+   * {@link JsonDeserializationContext#deserialize(JsonElement, Type)} method to create objects
+   * for any non-trivial field of the returned object. However, you should never invoke it on the
+   * the same type passing {@code json} since that will cause an infinite loop (Gson will call your
+   * call-back method again).
+   *
+   * @param json The Json data being deserialized
+   * @param typeOfT The type of the Object to deserialize to
+   * @return a deserialized object of the specified type typeOfT which is a subclass of {@code T}
+   * @throws JsonParseException if json is not in the expected format of {@code typeofT}
+   */
+  public T deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
+      throws JsonParseException;
+}

src/com/bukkit/mcteam/gson/JsonDeserializerExceptionWrapper.java

@@ -0,0 +1,71 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+import java.lang.reflect.Type;
+
+/**
+ * Decorators a {@code JsonDeserializer} instance with exception handling.  This wrapper class
+ * ensures that a {@code JsonDeserializer} will not propagate any exception other than a
+ * {@link JsonParseException}.
+ *
+ * @param <T> type of the deserializer being wrapped.
+ *
+ * @author Inderjeet Singh
+ * @author Joel Leitch
+ */
+class JsonDeserializerExceptionWrapper<T> implements JsonDeserializer<T> {
+
+  private final JsonDeserializer<T> delegate;
+
+  /**
+   * Returns a wrapped {@link JsonDeserializer} object that has been decorated with
+   * {@link JsonParseException} handling.
+   *
+   * @param delegate the {@code JsonDeserializer} instance to be wrapped.
+   * @throws IllegalArgumentException if {@code delegate} is {@code null}.
+   */
+  JsonDeserializerExceptionWrapper(JsonDeserializer<T> delegate) {
+    Preconditions.checkNotNull(delegate);
+    this.delegate = delegate;
+  }
+
+  public T deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
+      throws JsonParseException {
+    try {
+      return delegate.deserialize(json, typeOfT, context);
+    } catch (JsonParseException e) {
+      // just rethrow the exception
+      throw e;
+    } catch (Exception e) {
+      // rethrow as a JsonParseException
+      StringBuilder errorMsg = new StringBuilder()
+          .append("The JsonDeserializer ")
+          .append(delegate)
+          .append(" failed to deserialized json object ")
+          .append(json)
+          .append(" given the type ")
+          .append(typeOfT);
+      throw new JsonParseException(errorMsg.toString(), e);
+    }
+  }
+  
+  @Override
+  public String toString() {
+    return delegate.toString();
+  }
+}

src/com/bukkit/mcteam/gson/JsonElement.java

@@ -0,0 +1,338 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+import java.io.IOException;
+import java.math.BigDecimal;
+import java.math.BigInteger;
+
+/**
+ * A class representing an element of Json. It could either be a {@link JsonObject}, a
+ * {@link JsonArray}, a {@link JsonPrimitive} or a {@link JsonNull}.
+ *
+ * @author Inderjeet Singh
+ * @author Joel Leitch
+ */
+public abstract class JsonElement {
+  private static final Escaper BASIC_ESCAPER = new Escaper(false);
+
+  /**
+   * provides check for verifying if this element is an array or not.
+   *
+   * @return true if this element is of type {@link JsonArray}, false otherwise.
+   */
+  public boolean isJsonArray() {
+    return this instanceof JsonArray;
+  }
+
+  /**
+   * provides check for verifying if this element is a Json object or not.
+   *
+   * @return true if this element is of type {@link JsonObject}, false otherwise.
+   */
+  public boolean isJsonObject() {
+    return this instanceof JsonObject;
+  }
+
+  /**
+   * provides check for verifying if this element is a primitive or not.
+   *
+   * @return true if this element is of type {@link JsonPrimitive}, false otherwise.
+   */
+  public boolean isJsonPrimitive() {
+    return this instanceof JsonPrimitive;
+  }
+
+  /**
+   * provides check for verifying if this element represents a null value or not.
+   *
+   * @return true if this element is of type {@link JsonNull}, false otherwise.
+   * @since 1.2
+   */
+  public boolean isJsonNull() {
+    return this instanceof JsonNull;
+  }
+
+  /**
+   * convenience method to get this element as a {@link JsonObject}. If the element is of some
+   * other type, a {@link ClassCastException} will result. Hence it is best to use this method
+   * after ensuring that this element is of the desired type by calling {@link #isJsonObject()}
+   * first.
+   *
+   * @return get this element as a {@link JsonObject}.
+   * @throws IllegalStateException if the element is of another type.
+   */
+  public JsonObject getAsJsonObject() {
+    if (isJsonObject()) {
+      return (JsonObject) this;
+    }
+    throw new IllegalStateException("This is not a JSON Object.");
+  }
+
+  /**
+   * convenience method to get this element as a {@link JsonArray}. If the element is of some
+   * other type, a {@link ClassCastException} will result. Hence it is best to use this method
+   * after ensuring that this element is of the desired type by calling {@link #isJsonArray()}
+   * first.
+   *
+   * @return get this element as a {@link JsonArray}.
+   * @throws IllegalStateException if the element is of another type.
+   */
+  public JsonArray getAsJsonArray() {
+    if (isJsonArray()) {
+      return (JsonArray) this;
+    }
+    throw new IllegalStateException("This is not a JSON Array.");
+  }
+
+  /**
+   * convenience method to get this element as a {@link JsonPrimitive}. If the element is of some
+   * other type, a {@link ClassCastException} will result. Hence it is best to use this method
+   * after ensuring that this element is of the desired type by calling {@link #isJsonPrimitive()}
+   * first.
+   *
+   * @return get this element as a {@link JsonPrimitive}.
+   * @throws IllegalStateException if the element is of another type.
+   */
+  public JsonPrimitive getAsJsonPrimitive() {
+    if (isJsonPrimitive()) {
+      return (JsonPrimitive) this;
+    }
+    throw new IllegalStateException("This is not a JSON Primitive.");
+  }
+
+  /**
+   * convenience method to get this element as a {@link JsonNull}. If the element is of some
+   * other type, a {@link ClassCastException} will result. Hence it is best to use this method
+   * after ensuring that this element is of the desired type by calling {@link #isJsonNull()}
+   * first.
+   *
+   * @return get this element as a {@link JsonNull}.
+   * @throws IllegalStateException if the element is of another type.
+   * @since 1.2
+   */
+  public JsonNull getAsJsonNull() {
+    if (isJsonNull()) {
+      return (JsonNull) this;
+    }
+    throw new IllegalStateException("This is not a JSON Null.");
+  }
+
+  /**
+   * convenience method to get this element as a boolean value.
+   *
+   * @return get this element as a primitive boolean value.
+   * @throws ClassCastException if the element is of not a {@link JsonPrimitive} and is not a valid
+   * boolean value.
+   * @throws IllegalStateException if the element is of the type {@link JsonArray} but contains
+   * more than a single element.
+   */
+  public boolean getAsBoolean() {
+    throw new UnsupportedOperationException();
+  }
+
+  /**
+   * convenience method to get this element as a {@link Boolean} value.
+   *
+   * @return get this element as a {@link Boolean} value.
+   * @throws ClassCastException if the element is of not a {@link JsonPrimitive} and is not a valid
+   * boolean value.
+   * @throws IllegalStateException if the element is of the type {@link JsonArray} but contains
+   * more than a single element.
+   */
+  Boolean getAsBooleanWrapper() {
+    throw new UnsupportedOperationException();
+  }
+
+  /**
+   * convenience method to get this element as a {@link Number}.
+   *
+   * @return get this element as a {@link Number}.
+   * @throws ClassCastException if the element is of not a {@link JsonPrimitive} and is not a valid
+   * number.
+   * @throws IllegalStateException if the element is of the type {@link JsonArray} but contains
+   * more than a single element.
+   */
+  public Number getAsNumber() {
+    throw new UnsupportedOperationException();
+  }
+
+  /**
+   * convenience method to get this element as a string value.
+   *
+   * @return get this element as a string value.
+   * @throws ClassCastException if the element is of not a {@link JsonPrimitive} and is not a valid
+   * string value.
+   * @throws IllegalStateException if the element is of the type {@link JsonArray} but contains
+   * more than a single element.
+   */
+  public String getAsString() {
+    throw new UnsupportedOperationException();
+  }
+
+  /**
+   * convenience method to get this element as a primitive double value.
+   *
+   * @return get this element as a primitive double value.
+   * @throws ClassCastException if the element is of not a {@link JsonPrimitive} and is not a valid
+   * double value.
+   * @throws IllegalStateException if the element is of the type {@link JsonArray} but contains
+   * more than a single element.
+   */
+  public double getAsDouble() {
+    throw new UnsupportedOperationException();
+  }
+
+  /**
+   * convenience method to get this element as a primitive float value.
+   *
+   * @return get this element as a primitive float value.
+   * @throws ClassCastException if the element is of not a {@link JsonPrimitive} and is not a valid
+   * float value.
+   * @throws IllegalStateException if the element is of the type {@link JsonArray} but contains
+   * more than a single element.
+   */
+  public float getAsFloat() {
+    throw new UnsupportedOperationException();
+  }
+
+  /**
+   * convenience method to get this element as a primitive long value.
+   *
+   * @return get this element as a primitive long value.
+   * @throws ClassCastException if the element is of not a {@link JsonPrimitive} and is not a valid
+   * long value.
+   * @throws IllegalStateException if the element is of the type {@link JsonArray} but contains
+   * more than a single element.
+   */
+  public long getAsLong() {
+    throw new UnsupportedOperationException();
+  }
+
+  /**
+   * convenience method to get this element as a primitive integer value.
+   *
+   * @return get this element as a primitive integer value.
+   * @throws ClassCastException if the element is of not a {@link JsonPrimitive} and is not a valid
+   * integer value.
+   * @throws IllegalStateException if the element is of the type {@link JsonArray} but contains
+   * more than a single element.
+   */
+  public int getAsInt() {
+    throw new UnsupportedOperationException();
+  }
+  
+  /**
+   * convenience method to get this element as a primitive byte value.
+   *
+   * @return get this element as a primitive byte value.
+   * @throws ClassCastException if the element is of not a {@link JsonPrimitive} and is not a valid
+   * byte value.
+   * @throws IllegalStateException if the element is of the type {@link JsonArray} but contains
+   * more than a single element.
+   * @since 1.3
+   */
+  public byte getAsByte() {
+    throw new UnsupportedOperationException();
+  }
+  
+  /**
+   * convenience method to get this element as a primitive character value.
+   *
+   * @return get this element as a primitive char value.
+   * @throws ClassCastException if the element is of not a {@link JsonPrimitive} and is not a valid
+   * char value.
+   * @throws IllegalStateException if the element is of the type {@link JsonArray} but contains
+   * more than a single element.
+   * @since 1.3
+   */
+  public char getAsCharacter() {
+    throw new UnsupportedOperationException();
+  }
+
+  /**
+   * convenience method to get this element as a {@link BigDecimal}.
+   *
+   * @return get this element as a {@link BigDecimal}.
+   * @throws ClassCastException if the element is of not a {@link JsonPrimitive}.
+   * * @throws NumberFormatException if the element is not a valid {@link BigDecimal}.
+   * @throws IllegalStateException if the element is of the type {@link JsonArray} but contains
+   * more than a single element.
+   * @since 1.2
+   */
+  public BigDecimal getAsBigDecimal() {
+    throw new UnsupportedOperationException();
+  }
+
+  /**
+   * convenience method to get this element as a {@link BigInteger}.
+   *
+   * @return get this element as a {@link BigInteger}.
+   * @throws ClassCastException if the element is of not a {@link JsonPrimitive}.
+   * @throws NumberFormatException if the element is not a valid {@link BigInteger}.
+   * @throws IllegalStateException if the element is of the type {@link JsonArray} but contains
+   * more than a single element.
+   * @since 1.2
+   */
+  public BigInteger getAsBigInteger() {
+    throw new UnsupportedOperationException();
+  }
+
+  /**
+   * convenience method to get this element as a primitive short value.
+   *
+   * @return get this element as a primitive short value.
+   * @throws ClassCastException if the element is of not a {@link JsonPrimitive} and is not a valid
+   * short value.
+   * @throws IllegalStateException if the element is of the type {@link JsonArray} but contains
+   * more than a single element.
+   */
+  public short getAsShort() {
+    throw new UnsupportedOperationException();
+  }
+
+  /**
+   * convenience method to get this element as an {@link Object} value.
+   *
+   * @return get this element as an Object value.
+   * @throws ClassCastException if the element is of not a {@link JsonPrimitive} and is not a valid
+   * Object value.
+   * @throws IllegalStateException if the element is of the type {@link JsonArray} but contains
+   * more than a single element.
+   */
+  Object getAsObject() {
+    throw new UnsupportedOperationException();
+  }
+
+  /**
+   * Returns a String representation of this element.
+   *
+   * @return String the string representation of this element.
+   */
+  @Override
+  public String toString() {
+    try {
+      StringBuilder sb = new StringBuilder();
+      toString(sb, BASIC_ESCAPER);
+      return sb.toString();
+    } catch (IOException e) {
+      throw new RuntimeException(e);
+    }
+  }
+
+  protected abstract void toString(Appendable sb, Escaper escaper) throws IOException;
+}

src/com/bukkit/mcteam/gson/JsonElementVisitor.java

@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+import java.io.IOException;
+
+/**
+ * Definition of a visitor for a JsonElement tree.
+ * 
+ * @author Inderjeet Singh
+ */
+interface JsonElementVisitor {
+  void visitPrimitive(JsonPrimitive primitive) throws IOException;
+  void visitNull() throws IOException;
+
+  void startArray(JsonArray array) throws IOException;
+  void visitArrayMember(JsonArray parent, JsonPrimitive member, boolean isFirst) throws IOException;
+  void visitArrayMember(JsonArray parent, JsonArray member, boolean isFirst) throws IOException;
+  void visitArrayMember(JsonArray parent, JsonObject member, boolean isFirst) throws IOException;
+  void visitNullArrayMember(JsonArray parent, boolean isFirst) throws IOException;
+  void endArray(JsonArray array) throws IOException;
+  
+  void startObject(JsonObject object) throws IOException;
+  void visitObjectMember(JsonObject parent, String memberName, JsonPrimitive member, 
+      boolean isFirst) throws IOException;
+  void visitObjectMember(JsonObject parent, String memberName, JsonArray member, 
+      boolean isFirst) throws IOException;
+  void visitObjectMember(JsonObject parent, String memberName, JsonObject member, 
+      boolean isFirst) throws IOException;
+  void visitNullObjectMember(JsonObject parent, String memberName, 
+      boolean isFirst) throws IOException;
+  void endObject(JsonObject object) throws IOException;
+}

src/com/bukkit/mcteam/gson/JsonFieldNameValidator.java

@@ -0,0 +1,56 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+/**
+ * This class can be used to check the validity of a JSON field name.
+ *
+ * <p>The primary use of this object is to ensure that any Java fields that use the
+ * {@link com.bukkit.mcteam.gson.annotations.SerializedName} annotation is providing valid JSON
+ * field names.  This will make the code fail-fast rather than letting the invalid
+ * field name propagate to the client and it fails to parse.</p>
+ *
+ * @author Joel Leitch
+ */
+class JsonFieldNameValidator {
+  private static final String COMMON_PATTERN = "[a-zA-Z][a-zA-Z0-9\\ \\$_\\-]*$";
+  
+  private static final Pattern JSON_FIELD_NAME_PATTERN =
+      Pattern.compile("(^" + COMMON_PATTERN + ")|(^[\\$_]" + COMMON_PATTERN + ")");
+
+  
+  /**
+   * Performs validation on the JSON field name to ensure it is a valid field name.
+   *
+   * @param fieldName the name of the field to validate
+   * @return {@code fieldName} if it is a valid JSON field name
+   * @throws IllegalArgumentException if the field name is an invalid JSON field name
+   */
+  public String validate(String fieldName) {
+    Preconditions.checkNotNull(fieldName);
+    Preconditions.checkArgument(!"".equals(fieldName.trim()));
+
+    Matcher matcher = JSON_FIELD_NAME_PATTERN.matcher(fieldName);
+    if (!matcher.matches()) {
+      throw new IllegalArgumentException(fieldName + " is not a valid JSON field name.");
+    }
+    return fieldName;
+  }
+}

src/com/bukkit/mcteam/gson/JsonIOException.java

@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.bukkit.mcteam.gson;
+
+/**
+ * This exception is raised when Gson was unable to read an input stream
+ * or write to one.
+ * 
+ * @author Inderjeet Singh
+ * @author Joel Leitch
+ */
+public final class JsonIOException extends JsonParseException {
+
+  private static final long serialVersionUID = 1L;
+
+  public JsonIOException(String msg) {
+    super(msg);
+  }
+
+  public JsonIOException(String msg, Throwable cause) {
+    super(msg, cause);
+  }
+
+  /**
+   * Creates exception with the specified cause. Consider using
+   * {@link #JsonIOException(String, Throwable)} instead if you can describe what happened.
+   *
+   * @param cause root exception that caused this exception to be thrown.
+   */
+  public JsonIOException(Throwable cause) {
+    super(cause);
+  }
+}

src/com/bukkit/mcteam/gson/JsonNull.java

@@ -0,0 +1,72 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+import java.io.IOException;
+
+/**
+ * A class representing a Json {@code null} value.
+ *
+ * @author Inderjeet Singh
+ * @author Joel Leitch
+ * @since 1.2
+ */
+public final class JsonNull extends JsonElement {
+  private static final JsonNull INSTANCE = new JsonNull();
+
+  /**
+   * Creates a new JsonNull object.
+   */
+  public JsonNull() {
+    // Do nothing
+  }
+  
+  @Override
+  protected void toString(Appendable sb, Escaper escaper) throws IOException {
+    sb.append("null");
+  }
+  
+  /**
+   * All instances of JsonNull have the same hash code since they are indistinguishable
+   */
+  @Override
+  public int hashCode() {
+    return JsonNull.class.hashCode();
+  }
+  
+  /**
+   * All instances of JsonNull are the same
+   */
+  @Override
+  public boolean equals(Object other) {
+    return other instanceof JsonNull;
+  }
+  
+  /**
+   * Creation method used to return an instance of a {@link JsonNull}.  To reduce the memory
+   * footprint, a single object has been created for this class; therefore the same instance is
+   * being returned for each invocation of this method. This method is kept private since we 
+   * prefer the users to use {@link JsonNull#JsonNull()} which is similar to how other JsonElements
+   * are created. Note that all instances of JsonNull return true for {@link #equals(Object)} 
+   * when compared to each other.
+   *
+   * @return a instance of a {@link JsonNull}
+   */
+  static JsonNull createJsonNull() {
+    return INSTANCE;
+  }
+}

src/com/bukkit/mcteam/gson/JsonObject.java

@@ -0,0 +1,208 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+import java.io.IOException;
+import java.util.LinkedHashMap;
+import java.util.Map;
+import java.util.Set;
+
+/**
+ * A class representing an object type in Json. An object consists of name-value pairs where names
+ * are strings, and values are any other type of {@link JsonElement}. This allows for a creating a
+ * tree of JsonElements. The member elements of this object are maintained in order they were added.
+ *
+ * @author Inderjeet Singh
+ * @author Joel Leitch
+ */
+public final class JsonObject extends JsonElement {
+  // We are using a linked hash map because it is important to preserve
+  // the order in which elements are inserted. This is needed to ensure
+  // that the fields of an object are inserted in the order they were
+  // defined in the class.
+  private final Map<String, JsonElement> members;
+
+  /**
+   * Creates an empty JsonObject.
+   */
+  public JsonObject() {
+    members = new LinkedHashMap<String, JsonElement>();
+  }
+
+  /**
+   * Adds a member, which is a name-value pair, to self. The name must be a String, but the value
+   * can be an arbitrary JsonElement, thereby allowing you to build a full tree of JsonElements
+   * rooted at this node.
+   *
+   * @param property name of the member.
+   * @param value the member object.
+   */
+  public void add(String property, JsonElement value) {
+    Preconditions.checkNotNull(property);
+    if (value == null) {
+      value = JsonNull.createJsonNull();
+    }
+    members.put(property, value);
+  }
+
+  /**
+   * Removes the {@code property} from this {@link JsonObject}.
+   *
+   * @param property name of the member that should be removed.
+   * @return the {@link JsonElement} object that is being removed.
+   * @since 1.3
+   */
+  public JsonElement remove(String property) {
+    return members.remove(property);
+  }
+
+  /**
+   * Convenience method to add a primitive member. The specified value is converted to a
+   * JsonPrimitive of String.
+   *
+   * @param property name of the member.
+   * @param value the string value associated with the member.
+   */
+  public void addProperty(String property, String value) {
+    add(property, createJsonElement(value));
+  }
+
+  /**
+   * Convenience method to add a primitive member. The specified value is converted to a
+   * JsonPrimitive of Number.
+   *
+   * @param property name of the member.
+   * @param value the number value associated with the member.
+   */
+  public void addProperty(String property, Number value) {
+    add(property, createJsonElement(value));
+  }
+
+  /**
+   * Convenience method to add a boolean member. The specified value is converted to a
+   * JsonPrimitive of Boolean.
+   *
+   * @param property name of the member.
+   * @param value the number value associated with the member.
+   */
+  public void addProperty(String property, Boolean value) {
+    add(property, createJsonElement(value));
+  }
+
+  /**
+   * Convenience method to add a char member. The specified value is converted to a
+   * JsonPrimitive of Character.
+   *
+   * @param property name of the member.
+   * @param value the number value associated with the member.
+   */
+  public void addProperty(String property, Character value) {
+    add(property, createJsonElement(value));
+  }
+
+  /**
+   * Creates the proper {@link JsonElement} object from the given {@code value} object.
+   *
+   * @param value the object to generate the {@link JsonElement} for
+   * @return a {@link JsonPrimitive} if the {@code value} is not null, otherwise a {@link JsonNull}
+   */
+  private JsonElement createJsonElement(Object value) {
+    return value == null ? JsonNull.createJsonNull() : new JsonPrimitive(value);
+  }
+
+  /**
+   * Returns a set of members of this object. The set is ordered, and the order is in which the
+   * elements were added.
+   *
+   * @return a set of members of this object.
+   */
+  public Set<Map.Entry<String, JsonElement>> entrySet() {
+    return members.entrySet();
+  }
+
+  /**
+   * Convenience method to check if a member with the specified name is present in this object.
+   *
+   * @param memberName name of the member that is being checked for presence.
+   * @return true if there is a member with the specified name, false otherwise.
+   */
+  public boolean has(String memberName) {
+    return members.containsKey(memberName);
+  }
+
+  /**
+   * Returns the member with the specified name.
+   *
+   * @param memberName name of the member that is being requested.
+   * @return the member matching the name. Null if no such member exists.
+   */
+  public JsonElement get(String memberName) {
+    if (members.containsKey(memberName)) {
+      JsonElement member = members.get(memberName);
+      return member == null ? JsonNull.createJsonNull() : member;
+    }
+    return null;
+  }
+
+  /**
+   * Convenience method to get the specified member as a JsonPrimitive element.
+   *
+   * @param memberName name of the member being requested.
+   * @return the JsonPrimitive corresponding to the specified member.
+   */
+  public JsonPrimitive getAsJsonPrimitive(String memberName) {
+    return (JsonPrimitive) members.get(memberName);
+  }
+
+  /**
+   * Convenience method to get the specified member as a JsonArray.
+   *
+   * @param memberName name of the member being requested.
+   * @return the JsonArray corresponding to the specified member.
+   */
+  public JsonArray getAsJsonArray(String memberName) {
+    return (JsonArray) members.get(memberName);
+  }
+
+  /**
+   * Convenience method to get the specified member as a JsonObject.
+   *
+   * @param memberName name of the member being requested.
+   * @return the JsonObject corresponding to the specified member.
+   */
+  public JsonObject getAsJsonObject(String memberName) {
+    return (JsonObject) members.get(memberName);
+  }
+
+  @Override
+  protected void toString(Appendable sb, Escaper escaper) throws IOException {
+    sb.append('{');
+    boolean first = true;
+    for (Map.Entry<String, JsonElement> entry : members.entrySet()) {
+      if (first) {
+        first = false;
+      } else {
+        sb.append(',');
+      }
+      sb.append('\"');
+      sb.append(escaper.escapeJsonString(entry.getKey()));
+      sb.append("\":");
+      entry.getValue().toString(sb, escaper);
+    }
+    sb.append('}');
+  }
+}

src/com/bukkit/mcteam/gson/JsonObjectDeserializationVisitor.java

@@ -0,0 +1,135 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+import java.lang.reflect.Type;
+
+/**
+ * A visitor that populates fields of an object with data from its equivalent
+ * JSON representation
+ *
+ * @author Inderjeet Singh
+ * @author Joel Leitch
+ */
+final class JsonObjectDeserializationVisitor<T> extends JsonDeserializationVisitor<T> {
+
+  JsonObjectDeserializationVisitor(JsonElement json, Type type,
+      ObjectNavigatorFactory factory, ObjectConstructor objectConstructor,
+      ParameterizedTypeHandlerMap<JsonDeserializer<?>> deserializers,
+      JsonDeserializationContext context) {
+    super(json, type, factory, objectConstructor, deserializers, context);
+  }
+
+  @Override
+  @SuppressWarnings("unchecked")
+  protected T constructTarget() {
+    return (T) objectConstructor.construct(targetType);
+  }
+
+  public void startVisitingObject(Object node) {
+    // do nothing
+  }
+
+  public void visitArray(Object array, Type componentType) {
+    // should not be called since this case should invoke JsonArrayDeserializationVisitor
+    throw new JsonParseException("Expecting object but found array: " + array);
+  }
+
+  public void visitObjectField(FieldAttributes f, Type typeOfF, Object obj) {
+    try {
+      if (!json.isJsonObject()) {
+        throw new JsonParseException("Expecting object found: " + json); 
+      }
+      JsonObject jsonObject = json.getAsJsonObject();
+      String fName = getFieldName(f);
+      JsonElement jsonChild = jsonObject.get(fName);
+      if (jsonChild != null) {
+        Object child = visitChildAsObject(typeOfF, jsonChild);
+        f.set(obj, child);
+      } else {
+        f.set(obj, null);
+      }
+    } catch (IllegalAccessException e) {
+      throw new RuntimeException(e);
+    }
+  }
+
+  public void visitArrayField(FieldAttributes f, Type typeOfF, Object obj) {
+    try {
+      if (!json.isJsonObject()) {
+        throw new JsonParseException("Expecting object found: " + json); 
+      }
+      JsonObject jsonObject = json.getAsJsonObject();
+      String fName = getFieldName(f);
+      JsonArray jsonChild = (JsonArray) jsonObject.get(fName);
+      if (jsonChild != null) {
+        Object array = visitChildAsArray(typeOfF, jsonChild);
+        f.set(obj, array);
+      } else {
+        f.set(obj, null);
+      }
+    } catch (IllegalAccessException e) {
+      throw new RuntimeException(e);
+    }
+  }
+
+  private String getFieldName(FieldAttributes f) {
+    FieldNamingStrategy2 namingPolicy = factory.getFieldNamingPolicy();
+    return namingPolicy.translateName(f);
+  }
+
+  public boolean visitFieldUsingCustomHandler(FieldAttributes f, Type declaredTypeOfField, Object parent) {
+    try {
+      String fName = getFieldName(f);
+      if (!json.isJsonObject()) {
+        throw new JsonParseException("Expecting object found: " + json); 
+      }
+      JsonElement child = json.getAsJsonObject().get(fName);
+      TypeInfo typeInfo = new TypeInfo(declaredTypeOfField);
+      if (child == null) { // Child will be null if the field wasn't present in Json
+        return true;
+      } else if (child.isJsonNull()) {
+        if (!typeInfo.isPrimitive()) {
+          f.set(parent, null);
+        }
+        return true;
+      }
+      ObjectTypePair objTypePair = new ObjectTypePair(null, declaredTypeOfField, false);
+      Pair<JsonDeserializer<?>, ObjectTypePair> pair = objTypePair.getMatchingHandler(deserializers);
+      if (pair == null) {
+        return false;
+      }      
+      Object value = invokeCustomDeserializer(child, pair);
+      if (value != null || !typeInfo.isPrimitive()) {
+        f.set(parent, value);
+      }
+      return true;
+    } catch (IllegalAccessException e) {
+      throw new RuntimeException();
+    }
+  }
+
+  @SuppressWarnings("unchecked")
+  public void visitPrimitive(Object primitive) {
+    if (!json.isJsonPrimitive()) {
+      throw new JsonParseException(
+          "Type information is unavailable, and the target object is not a primitive: " + json);
+    }
+    JsonPrimitive prim = json.getAsJsonPrimitive();
+    target = (T) prim.getAsObject();
+  }
+}

src/com/bukkit/mcteam/gson/JsonParseException.java

@@ -0,0 +1,64 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+/**
+ * This exception is raised if there is a serious issue that occurs during parsing of a Json
+ * string.  One of the main usages for this class is for the Gson infrastructure.  If the incoming
+ * Json is bad/malicious, an instance of this exception is raised.
+ *
+ * <p>This exception is a {@link RuntimeException} because it is exposed to the client.  Using a
+ * {@link RuntimeException} avoids bad coding practices on the client side where they catch the
+ * exception and do nothing.  It is often the case that you want to blow up if there is a parsing
+ * error (i.e. often clients do not know how to recover from a {@link JsonParseException}.</p>
+ *
+ * @author Inderjeet Singh
+ * @author Joel Leitch
+ */
+public class JsonParseException extends RuntimeException {
+  static final long serialVersionUID = -4086729973971783390L;
+
+  /**
+   * Creates exception with the specified message. If you are wrapping another exception, consider
+   * using {@link #JsonParseException(String, Throwable)} instead.
+   *
+   * @param msg error message describing a possible cause of this exception.
+   */
+  public JsonParseException(String msg) {
+    super(msg);
+  }
+
+  /**
+   * Creates exception with the specified message and cause.
+   *
+   * @param msg error message describing what happened.
+   * @param cause root exception that caused this exception to be thrown.
+   */
+  public JsonParseException(String msg, Throwable cause) {
+    super(msg, cause);
+  }
+
+  /**
+   * Creates exception with the specified cause. Consider using
+   * {@link #JsonParseException(String, Throwable)} instead if you can describe what happened.
+   *
+   * @param cause root exception that caused this exception to be thrown.
+   */
+  public JsonParseException(Throwable cause) {
+    super(cause);
+  }
+}

src/com/bukkit/mcteam/gson/JsonParser.java

@@ -0,0 +1,97 @@
+/*
+ * Copyright (C) 2009 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.bukkit.mcteam.gson;
+
+import com.bukkit.mcteam.gson.stream.JsonReader;
+import com.bukkit.mcteam.gson.stream.JsonToken;
+import com.bukkit.mcteam.gson.stream.MalformedJsonException;
+import java.io.EOFException;
+import java.io.IOException;
+import java.io.Reader;
+import java.io.StringReader;
+
+/**
+ * A parser to parse Json into a parse tree of {@link JsonElement}s
+ *
+ * @author Inderjeet Singh
+ * @author Joel Leitch
+ * @since 1.3
+ */
+public final class JsonParser {
+
+  /**
+   * Parses the specified JSON string into a parse tree
+   *
+   * @param json JSON text
+   * @return a parse tree of {@link JsonElement}s corresponding to the specified JSON
+   * @throws JsonParseException if the specified text is not valid JSON
+   * @since 1.3
+   */
+  public JsonElement parse(String json) throws JsonSyntaxException {
+    return parse(new StringReader(json));
+  }
+
+  /**
+   * Parses the specified JSON string into a parse tree
+   *
+   * @param json JSON text
+   * @return a parse tree of {@link JsonElement}s corresponding to the specified JSON
+   * @throws JsonParseException if the specified text is not valid JSON
+   * @since 1.3
+   */
+  public JsonElement parse(Reader json) throws JsonIOException, JsonSyntaxException {
+    try {
+      JsonReader jsonReader = new JsonReader(json);
+      JsonElement element = parse(jsonReader);
+      if (!element.isJsonNull() && jsonReader.peek() != JsonToken.END_DOCUMENT) {
+        throw new JsonSyntaxException("Did not consume the entire document.");
+      }
+      return element;
+    } catch (MalformedJsonException e) {
+      throw new JsonSyntaxException(e);
+    } catch (IOException e) {
+      throw new JsonIOException(e);
+    } catch (NumberFormatException e) {
+      throw new JsonSyntaxException(e);
+    }
+  }
+
+  /**
+   * Returns the next value from the JSON stream as a parse tree.
+   *
+   * @throws JsonParseException if there is an IOException or if the specified
+   *     text is not valid JSON
+   * @since 1.6
+   */
+  public JsonElement parse(JsonReader json) throws JsonIOException, JsonSyntaxException {
+    boolean lenient = json.isLenient();
+    json.setLenient(true);
+    try {
+      return Streams.parse(json);
+    } catch (StackOverflowError e) {
+      throw new JsonParseException("Failed parsing JSON source: " + json + " to Json", e);
+    } catch (OutOfMemoryError e) {
+      throw new JsonParseException("Failed parsing JSON source: " + json + " to Json", e);
+    } catch (JsonParseException e) {
+      if (e.getCause() instanceof EOFException) {
+        return JsonNull.createJsonNull();
+      }
+      throw e;
+    } finally {
+      json.setLenient(lenient);
+    }
+  }
+}

src/com/bukkit/mcteam/gson/JsonPrimitive.java

@@ -0,0 +1,387 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+import java.io.IOException;
+import java.math.BigDecimal;
+import java.math.BigInteger;
+
+/**
+ * A class representing a Json primitive value. A primitive value
+ * is either a String, a Java primitive, or a Java primitive
+ * wrapper type.
+ *
+ * @author Inderjeet Singh
+ * @author Joel Leitch
+ */
+public final class JsonPrimitive extends JsonElement {
+  private static final Class<?>[] PRIMITIVE_TYPES = { int.class, long.class, short.class,
+      float.class, double.class, byte.class, boolean.class, char.class, Integer.class, Long.class,
+      Short.class, Float.class, Double.class, Byte.class, Boolean.class, Character.class };
+
+  private static final BigInteger INTEGER_MAX = BigInteger.valueOf(Integer.MAX_VALUE);
+  private static final BigInteger LONG_MAX = BigInteger.valueOf(Long.MAX_VALUE);
+
+  private Object value;
+
+  /**
+   * Create a primitive containing a boolean value.
+   *
+   * @param bool the value to create the primitive with.
+   */
+  public JsonPrimitive(Boolean bool) {
+    setValue(bool);
+  }
+
+  /**
+   * Create a primitive containing a {@link Number}.
+   *
+   * @param number the value to create the primitive with.
+   */
+  public JsonPrimitive(Number number) {
+    setValue(number);
+  }
+
+  /**
+   * Create a primitive containing a String value.
+   *
+   * @param string the value to create the primitive with.
+   */
+  public JsonPrimitive(String string) {
+    setValue(string);
+  }
+
+  /**
+   * Create a primitive containing a character. The character is turned into a one character String
+   * since Json only supports String.
+   *
+   * @param c the value to create the primitive with.
+   */
+  public JsonPrimitive(Character c) {
+    setValue(c);
+  }
+
+  /**
+   * Create a primitive using the specified Object. It must be an instance of {@link Number}, a
+   * Java primitive type, or a String.
+   *
+   * @param primitive the value to create the primitive with.
+   */
+  JsonPrimitive(Object primitive) {
+    setValue(primitive);
+  }
+
+  void setValue(Object primitive) {
+    if (primitive instanceof Character) {
+      // convert characters to strings since in JSON, characters are represented as a single
+      // character string
+      char c = ((Character) primitive).charValue();
+      this.value = String.valueOf(c);
+    } else {
+      Preconditions.checkArgument(primitive instanceof Number
+          || isPrimitiveOrString(primitive));
+      this.value = primitive;
+    }
+  }
+
+  /**
+   * Check whether this primitive contains a boolean value.
+   *
+   * @return true if this primitive contains a boolean value, false otherwise.
+   */
+  public boolean isBoolean() {
+    return value instanceof Boolean;
+  }
+
+  /**
+   * convenience method to get this element as a {@link Boolean}.
+   *
+   * @return get this element as a {@link Boolean}.
+   * @throws ClassCastException if the value contained is not a valid boolean value.
+   */
+  @Override
+  Boolean getAsBooleanWrapper() {
+    return (Boolean) value;
+  }
+
+  /**
+   * convenience method to get this element as a boolean value.
+   *
+   * @return get this element as a primitive boolean value.
+   * @throws ClassCastException if the value contained is not a valid boolean value.
+   */
+  @Override
+  public boolean getAsBoolean() {
+    return isBoolean() ? getAsBooleanWrapper().booleanValue() : Boolean.parseBoolean(getAsString());
+  }
+
+  /**
+   * Check whether this primitive contains a Number.
+   *
+   * @return true if this primitive contains a Number, false otherwise.
+   */
+  public boolean isNumber() {
+    return value instanceof Number;
+  }
+
+  /**
+   * convenience method to get this element as a Number.
+   *
+   * @return get this element as a Number.
+   * @throws ClassCastException if the value contained is not a valid Number.
+   */
+  @Override
+  public Number getAsNumber() {
+    return value instanceof String ? stringToNumber((String) value) : (Number) value;
+  }
+
+  static Number stringToNumber(String value) {
+    try {
+      long longValue = Long.parseLong(value);
+      if (longValue >= Integer.MIN_VALUE && longValue <= Integer.MAX_VALUE) {
+        return (int) longValue;
+      }
+      return longValue;
+    } catch (NumberFormatException ignored) {
+    }
+
+    try {
+      return new BigDecimal(value);
+    } catch (NumberFormatException ignored) {
+      return Double.parseDouble(value); // probably NaN, -Infinity or Infinity
+    }
+  }
+
+  /**
+   * Check whether this primitive contains a String value.
+   *
+   * @return true if this primitive contains a String value, false otherwise.
+   */
+  public boolean isString() {
+    return value instanceof String;
+  }
+
+  /**
+   * convenience method to get this element as a String.
+   *
+   * @return get this element as a String.
+   * @throws ClassCastException if the value contained is not a valid String.
+   */
+  @Override
+  public String getAsString() {
+    if (isNumber()) {
+      return getAsNumber().toString();
+    } else if (isBoolean()) {
+      return getAsBooleanWrapper().toString();
+    } else {
+      return (String) value;
+    }
+  }
+
+  /**
+   * convenience method to get this element as a primitive double.
+   *
+   * @return get this element as a primitive double.
+   * @throws ClassCastException if the value contained is not a valid double.
+   */
+  @Override
+  public double getAsDouble() {
+    return isNumber() ? getAsNumber().doubleValue() : Double.parseDouble(getAsString());
+  }
+
+  /**
+   * convenience method to get this element as a {@link BigDecimal}.
+   *
+   * @return get this element as a {@link BigDecimal}.
+   * @throws NumberFormatException if the value contained is not a valid {@link BigDecimal}.
+   */
+  @Override
+  public BigDecimal getAsBigDecimal() {
+    return value instanceof BigDecimal ? (BigDecimal) value : new BigDecimal(value.toString());
+  }
+
+  /**
+   * convenience method to get this element as a {@link BigInteger}.
+   *
+   * @return get this element as a {@link BigInteger}.
+   * @throws NumberFormatException if the value contained is not a valid {@link BigInteger}.
+   */
+  @Override
+  public BigInteger getAsBigInteger() {
+    return value instanceof BigInteger ? (BigInteger) value : new BigInteger(value.toString());
+  }
+
+  /**
+   * convenience method to get this element as a float.
+   *
+   * @return get this element as a float.
+   * @throws ClassCastException if the value contained is not a valid float.
+   */
+  @Override
+  public float getAsFloat() {
+    return isNumber() ? getAsNumber().floatValue() : Float.parseFloat(getAsString());
+  }
+
+  /**
+   * convenience method to get this element as a primitive long.
+   *
+   * @return get this element as a primitive long.
+   * @throws ClassCastException if the value contained is not a valid long.
+   */
+  @Override
+  public long getAsLong() {
+    return isNumber() ? getAsNumber().longValue() : Long.parseLong(getAsString());
+  }
+
+  /**
+   * convenience method to get this element as a primitive short.
+   *
+   * @return get this element as a primitive short.
+   * @throws ClassCastException if the value contained is not a valid short value.
+   */
+  @Override
+  public short getAsShort() {
+    return isNumber() ? getAsNumber().shortValue() : Short.parseShort(getAsString());
+  }
+
+ /**
+  * convenience method to get this element as a primitive integer.
+  *
+  * @return get this element as a primitive integer.
+  * @throws ClassCastException if the value contained is not a valid integer.
+  */
+  @Override
+  public int getAsInt() {
+    return isNumber() ? getAsNumber().intValue() : Integer.parseInt(getAsString());
+  }
+
+  @Override
+  public byte getAsByte() {
+    return isNumber() ? getAsNumber().byteValue() : Byte.parseByte(getAsString());
+  }
+
+  @Override
+  public char getAsCharacter() {
+    return getAsString().charAt(0);
+  }
+
+  /**
+   * convenience method to get this element as an Object.
+   *
+   * @return get this element as an Object that can be converted to a suitable value.
+   */
+  @Override
+  Object getAsObject() {
+    if (value instanceof BigInteger) {
+      BigInteger big = (BigInteger) value;
+      if (big.compareTo(INTEGER_MAX) < 0) {
+        return big.intValue();
+      } else if (big.compareTo(LONG_MAX) < 0) {
+        return big.longValue();
+      }
+    }
+    // No need to convert to float or double since those lose precision
+    return value;
+  }
+
+  @Override
+  protected void toString(Appendable sb, Escaper escaper) throws IOException {
+    if (isString()) {
+      sb.append('"');
+      sb.append(escaper.escapeJsonString(value.toString()));
+      sb.append('"');
+    } else {
+      sb.append(value.toString());
+    }
+  }
+
+  private static boolean isPrimitiveOrString(Object target) {
+    if (target instanceof String) {
+      return true;
+    }
+
+    Class<?> classOfPrimitive = target.getClass();
+    for (Class<?> standardPrimitive : PRIMITIVE_TYPES) {
+      if (standardPrimitive.isAssignableFrom(classOfPrimitive)) {
+        return true;
+      }
+    }
+    return false;
+  }
+
+  @Override
+  public int hashCode() {
+    if (value == null) {
+      return 31;
+    }
+    // Using recommended hashing algorithm from Effective Java for longs and doubles
+    if (isIntegral(this)) {
+      long value = getAsNumber().longValue();
+      return (int) (value ^ (value >>> 32));
+    }
+    if (isFloatingPoint(this)) {
+      long value = Double.doubleToLongBits(getAsNumber().doubleValue());
+      return (int) (value ^ (value >>> 32));
+    }
+    return value.hashCode();
+  }
+
+  @Override
+  public boolean equals(Object obj) {
+    if (this == obj) {
+      return true;
+    }
+    if (obj == null || getClass() != obj.getClass()) {
+      return false;
+    }
+    JsonPrimitive other = (JsonPrimitive)obj;
+    if (value == null) {
+      return other.value == null;
+    }
+    if (isIntegral(this) && isIntegral(other)) {
+      return getAsNumber().longValue() == other.getAsNumber().longValue();
+    }
+    if (isFloatingPoint(this) && isFloatingPoint(other)) {
+      return getAsNumber().doubleValue() == other.getAsNumber().doubleValue();
+    }
+    return value.equals(other.value);
+  }
+
+  /**
+   * Returns true if the specified number is an integral type
+   * (Long, Integer, Short, Byte, BigInteger)
+   */
+  private static boolean isIntegral(JsonPrimitive primitive) {
+    if (primitive.value instanceof Number) {
+      Number number = (Number) primitive.value;
+      return number instanceof BigInteger || number instanceof Long || number instanceof Integer
+      || number instanceof Short || number instanceof Byte;
+    }
+    return false;
+  }
+
+  /**
+   * Returns true if the specified number is a floating point type (BigDecimal, double, float)
+   */
+  private static boolean isFloatingPoint(JsonPrimitive primitive) {
+    if (primitive.value instanceof Number) {
+      Number number = (Number) primitive.value;
+      return number instanceof BigDecimal || number instanceof Double || number instanceof Float;
+    }
+    return false;
+  }
+}

src/com/bukkit/mcteam/gson/JsonSerializationContext.java

@@ -0,0 +1,49 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+import java.lang.reflect.Type;
+
+/**
+ * Context for serialization that is passed to a custom serializer during invocation of its
+ * {@link JsonSerializer#serialize(Object, Type, JsonSerializationContext)} method.
+ *
+ * @author Inderjeet Singh
+ * @author Joel Leitch
+ */
+public interface JsonSerializationContext {
+
+  /**
+   * Invokes default serialization on the specified object.
+   *
+   * @param src the object that needs to be serialized.
+   * @return a tree of {@link JsonElement}s corresponding to the serialized form of {@code src}.
+   */
+  public JsonElement serialize(Object src);
+
+  /**
+   * Invokes default serialization on the specified object passing the specific type information.
+   * It should never be invoked on the element received as a parameter of the
+   * {@link JsonSerializer#serialize(Object, Type, JsonSerializationContext)} method. Doing
+   * so will result in an infinite loop since Gson will in-turn call the custom serializer again.
+   *
+   * @param src the object that needs to be serialized.
+   * @param typeOfSrc the actual genericized type of src object.
+   * @return a tree of {@link JsonElement}s corresponding to the serialized form of {@code src}.
+   */
+  public JsonElement serialize(Object src, Type typeOfSrc);
+}

src/com/bukkit/mcteam/gson/JsonSerializationContextDefault.java

@@ -0,0 +1,59 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+import java.lang.reflect.Type;
+
+/**
+ * An implementation of serialization context for Gson.
+ *
+ * @author Inderjeet Singh
+ */
+final class JsonSerializationContextDefault implements JsonSerializationContext {
+
+  private final ObjectNavigatorFactory factory;
+  private final ParameterizedTypeHandlerMap<JsonSerializer<?>> serializers;
+  private final boolean serializeNulls;
+  private final MemoryRefStack ancestors;
+
+  JsonSerializationContextDefault(ObjectNavigatorFactory factory, boolean serializeNulls,
+      ParameterizedTypeHandlerMap<JsonSerializer<?>> serializers) {
+    this.factory = factory;
+    this.serializeNulls = serializeNulls;
+    this.serializers = serializers;
+    this.ancestors = new MemoryRefStack();
+  }
+
+  public JsonElement serialize(Object src) {
+    if (src == null) {
+      return JsonNull.createJsonNull();
+    }
+    return serialize(src, src.getClass(), true);
+  }
+
+  public JsonElement serialize(Object src, Type typeOfSrc) {
+    return serialize(src, typeOfSrc, true);
+  }
+
+  public JsonElement serialize(Object src, Type typeOfSrc, boolean preserveType) {
+    ObjectNavigator on = factory.create(new ObjectTypePair(src, typeOfSrc, preserveType));
+    JsonSerializationVisitor visitor =
+        new JsonSerializationVisitor(factory, serializeNulls, serializers, this, ancestors);
+    on.accept(visitor);
+    return visitor.getJsonElement();
+  }
+}

src/com/bukkit/mcteam/gson/JsonSerializationVisitor.java

@@ -0,0 +1,236 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+import java.lang.reflect.Array;
+import java.lang.reflect.Type;
+
+/**
+ * A visitor that adds JSON elements corresponding to each field of an object
+ *
+ * @author Inderjeet Singh
+ * @author Joel Leitch
+ */
+final class JsonSerializationVisitor implements ObjectNavigator.Visitor {
+
+  private final ObjectNavigatorFactory factory;
+  private final ParameterizedTypeHandlerMap<JsonSerializer<?>> serializers;
+  private final boolean serializeNulls;
+  private final JsonSerializationContext context;
+  private final MemoryRefStack ancestors;
+  private JsonElement root;
+
+  JsonSerializationVisitor(ObjectNavigatorFactory factory, boolean serializeNulls,
+      ParameterizedTypeHandlerMap<JsonSerializer<?>> serializers, JsonSerializationContext context,
+      MemoryRefStack ancestors) {
+    this.factory = factory;
+    this.serializeNulls = serializeNulls;
+    this.serializers = serializers;
+    this.context = context;
+    this.ancestors = ancestors;
+  }
+
+  public Object getTarget() {
+    return null;
+  }
+
+  public void start(ObjectTypePair node) {
+    if (node == null) {
+      return;
+    }
+    if (ancestors.contains(node)) {
+      throw new CircularReferenceException(node);
+    }
+    ancestors.push(node);
+  }
+
+  public void end(ObjectTypePair node) {
+    if (node != null) {
+      ancestors.pop();
+    }
+  }
+
+  public void startVisitingObject(Object node) {
+    assignToRoot(new JsonObject());
+  }
+
+  public void visitArray(Object array, Type arrayType) {
+    assignToRoot(new JsonArray());
+    int length = Array.getLength(array);
+    TypeInfoArray fieldTypeInfo = TypeInfoFactory.getTypeInfoForArray(arrayType);
+    Type componentType = fieldTypeInfo.getSecondLevelType();
+    for (int i = 0; i < length; ++i) {
+      Object child = Array.get(array, i);
+      Type childType = componentType;
+      // we should not get more specific component type yet since it is possible
+      // that a custom
+      // serializer is registered for the componentType
+      addAsArrayElement(new ObjectTypePair(child, childType, false));
+    }
+  }
+
+  public void visitArrayField(FieldAttributes f, Type typeOfF, Object obj) {
+    try {
+      if (isFieldNull(f, obj)) {
+        if (serializeNulls) {
+          addChildAsElement(f, JsonNull.createJsonNull());
+        }
+      } else {
+        Object array = getFieldValue(f, obj);
+        addAsChildOfObject(f, new ObjectTypePair(array, typeOfF, false));
+      }
+    } catch (CircularReferenceException e) {
+      throw e.createDetailedException(f);
+    }
+  }
+
+  public void visitObjectField(FieldAttributes f, Type typeOfF, Object obj) {
+    try {
+      if (isFieldNull(f, obj)) {
+        if (serializeNulls) {
+          addChildAsElement(f, JsonNull.createJsonNull());
+        }
+      } else {
+        Object fieldValue = getFieldValue(f, obj);
+        // we should not get more specific component type yet since it is
+        // possible that a custom
+        // serializer is registered for the componentType
+        addAsChildOfObject(f, new ObjectTypePair(fieldValue, typeOfF, false));
+      }
+    } catch (CircularReferenceException e) {
+      throw e.createDetailedException(f);
+    }
+  }
+
+  public void visitPrimitive(Object obj) {
+    JsonElement json = obj == null ? JsonNull.createJsonNull() : new JsonPrimitive(obj);
+    assignToRoot(json);
+  }
+
+  private void addAsChildOfObject(FieldAttributes f, ObjectTypePair fieldValuePair) {
+    JsonElement childElement = getJsonElementForChild(fieldValuePair);
+    addChildAsElement(f, childElement);
+  }
+
+  private void addChildAsElement(FieldAttributes f, JsonElement childElement) {
+    FieldNamingStrategy2 namingPolicy = factory.getFieldNamingPolicy();
+    root.getAsJsonObject().add(namingPolicy.translateName(f), childElement);
+  }
+
+  private void addAsArrayElement(ObjectTypePair elementTypePair) {
+    if (elementTypePair.getObject() == null) {
+      root.getAsJsonArray().add(JsonNull.createJsonNull());
+    } else {
+      JsonElement childElement = getJsonElementForChild(elementTypePair);
+      root.getAsJsonArray().add(childElement);
+    }
+  }
+
+  private JsonElement getJsonElementForChild(ObjectTypePair fieldValueTypePair) {
+    ObjectNavigator on = factory.create(fieldValueTypePair);
+    JsonSerializationVisitor childVisitor =
+        new JsonSerializationVisitor(factory, serializeNulls, serializers, context, ancestors);
+    on.accept(childVisitor);
+    return childVisitor.getJsonElement();
+  }
+
+  public boolean visitUsingCustomHandler(ObjectTypePair objTypePair) {
+    try {
+      Object obj = objTypePair.getObject();
+      if (obj == null) {
+        if (serializeNulls) {
+          assignToRoot(JsonNull.createJsonNull());
+        }
+        return true;
+      }
+      JsonElement element = findAndInvokeCustomSerializer(objTypePair);
+      if (element != null) {
+        assignToRoot(element);
+        return true;
+      }
+      return false;
+    } catch (CircularReferenceException e) {
+      throw e.createDetailedException(null);
+    }
+  }
+
+  /**
+   * objTypePair.getObject() must not be null
+   */
+  @SuppressWarnings({"unchecked", "rawtypes"})
+  private JsonElement findAndInvokeCustomSerializer(ObjectTypePair objTypePair) {
+    Pair<JsonSerializer<?>,ObjectTypePair> pair = objTypePair.getMatchingHandler(serializers);
+    if (pair == null) {
+      return null;
+    }
+    JsonSerializer serializer = pair.first;
+    objTypePair = pair.second;
+    start(objTypePair);
+    try {
+      JsonElement element =
+          serializer.serialize(objTypePair.getObject(), objTypePair.getType(), context);
+      return element == null ? JsonNull.createJsonNull() : element;
+    } finally {
+      end(objTypePair);
+    }
+  }
+
+  public boolean visitFieldUsingCustomHandler(FieldAttributes f, Type declaredTypeOfField, Object parent) {
+    try {
+      Preconditions.checkState(root.isJsonObject());
+      Object obj = f.get(parent);
+      if (obj == null) {
+        if (serializeNulls) {
+          addChildAsElement(f, JsonNull.createJsonNull());
+        }
+        return true;
+      }
+      ObjectTypePair objTypePair = new ObjectTypePair(obj, declaredTypeOfField, false);
+      JsonElement child = findAndInvokeCustomSerializer(objTypePair);
+      if (child != null) {
+        addChildAsElement(f, child);
+        return true;
+      }
+      return false;
+    } catch (IllegalAccessException e) {
+      throw new RuntimeException();
+    } catch (CircularReferenceException e) {
+      throw e.createDetailedException(f);
+    }
+  }
+
+  private void assignToRoot(JsonElement newRoot) {
+    Preconditions.checkNotNull(newRoot);
+    root = newRoot;
+  }
+
+  private boolean isFieldNull(FieldAttributes f, Object obj) {
+    return getFieldValue(f, obj) == null;
+  }
+
+  private Object getFieldValue(FieldAttributes f, Object obj) {
+    try {
+      return f.get(obj);
+    } catch (IllegalAccessException e) {
+      throw new RuntimeException(e);
+    }
+  }
+
+  public JsonElement getJsonElement() {
+    return root;
+  }
+}

src/com/bukkit/mcteam/gson/JsonSerializer.java

@@ -0,0 +1,86 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+import java.lang.reflect.Type;
+
+/**
+ * Interface representing a custom serializer for Json. You should write a custom serializer, if
+ * you are not happy with the default serialization done by Gson. You will also need to register
+ * this serializer through {@link com.bukkit.mcteam.gson.GsonBuilder#registerTypeAdapter(Type, Object)}.
+ *
+ * <p>Let us look at example where defining a serializer will be useful. The {@code Id} class
+ * defined below has two fields: {@code clazz} and {@code value}.</p>
+ *
+ * <p><pre>
+ * public class Id&lt;T&gt; {
+ *   private final Class&lt;T&gt; clazz;
+ *   private final long value;
+ *
+ *   public Id(Class&lt;T&gt; clazz, long value) {
+ *     this.clazz = clazz;
+ *     this.value = value;
+ *   }
+ *
+ *   public long getValue() {
+ *     return value;
+ *   }
+ * }
+ * </pre></p>
+ *
+ * <p>The default serialization of {@code Id(com.foo.MyObject.class, 20L)} will be
+ * <code>{"clazz":com.foo.MyObject,"value":20}</code>. Suppose, you just want the output to be
+ * the value instead, which is {@code 20} in this case. You can achieve that by writing a custom
+ * serializer:</p>
+ *
+ * <p><pre>
+ * class IdSerializer implements JsonSerializer&lt;Id&gt;() {
+ *   public JsonElement toJson(Id id, Type typeOfId, JsonSerializationContext context) {
+ *     return new JsonPrimitive(id.getValue());
+ *   }
+ * }
+ * </pre></p>
+ *
+ * <p>You will also need to register {@code IdSerializer} with Gson as follows:</p>
+ * <pre>
+ * Gson gson = new GsonBuilder().registerTypeAdapter(Id.class, new IdSerializer()).create();
+ * </pre>
+ *
+ * @author Inderjeet Singh
+ * @author Joel Leitch
+ *
+ * @param <T> type for which the serializer is being registered. It is possible that a serializer
+ *        may be asked to serialize a specific generic type of the T.
+ */
+public interface JsonSerializer<T> {
+
+  /**
+   * Gson invokes this call-back method during serialization when it encounters a field of the
+   * specified type.
+   *
+   * <p>In the implementation of this call-back method, you should consider invoking
+   * {@link JsonSerializationContext#serialize(Object, Type)} method to create JsonElements for any
+   * non-trivial field of the {@code src} object. However, you should never invoke it on the
+   * {@code src} object itself since that will cause an infinite loop (Gson will call your
+   * call-back method again).</p>
+   *
+   * @param src the object that needs to be converted to Json.
+   * @param typeOfSrc the actual type (fully genericized version) of the source object.
+   * @return a JsonElement corresponding to the specified object.
+   */
+  public JsonElement serialize(T src, Type typeOfSrc, JsonSerializationContext context);
+}

src/com/bukkit/mcteam/gson/JsonStreamParser.java

@@ -0,0 +1,122 @@
+/*
+ * Copyright (C) 2009 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.bukkit.mcteam.gson;
+
+import java.io.EOFException;
+import java.io.IOException;
+import java.io.Reader;
+import java.io.StringReader;
+import java.util.Iterator;
+import java.util.NoSuchElementException;
+
+import com.bukkit.mcteam.gson.stream.JsonReader;
+import com.bukkit.mcteam.gson.stream.JsonToken;
+import com.bukkit.mcteam.gson.stream.MalformedJsonException;
+
+/**
+ * A streaming parser that allows reading of multiple {@link JsonElement}s from the specified reader
+ * asynchronously.
+ * 
+ * <p>This class is conditionally thread-safe (see Item 70, Effective Java second edition). To
+ * properly use this class across multiple threads, you will need to add some external
+ * synchronization.  For example:
+ * 
+ * <pre>
+ * JsonStreamParser parser = new JsonStreamParser("['first'] {'second':10} 'third'");
+ * JsonElement element;
+ * synchronized (parser) {  // synchronize on an object shared by threads
+ *   if (parser.hasNext()) {
+ *     element = parser.next();
+ *   }
+ * }
+ * </pre>
+ *
+ * @author Inderjeet Singh
+ * @author Joel Leitch
+ * @since 1.4
+ */
+public final class JsonStreamParser implements Iterator<JsonElement> {
+
+  private final JsonReader parser;
+  private final Object lock;
+
+  /**
+   * @param json The string containing JSON elements concatenated to each other.
+   * @since 1.4
+   */
+  public JsonStreamParser(String json) {
+    this(new StringReader(json));      
+  }
+  
+  /**
+   * @param reader The data stream containing JSON elements concatenated to each other.
+   * @since 1.4
+   */
+  public JsonStreamParser(Reader reader) {
+    parser = new JsonReader(reader);
+    parser.setLenient(true);
+    lock = new Object();
+  }
+  
+  /**
+   * Returns the next available {@link JsonElement} on the reader. Null if none available.
+   * 
+   * @return the next available {@link JsonElement} on the reader. Null if none available.
+   * @throws JsonParseException if the incoming stream is malformed JSON.
+   * @since 1.4
+   */
+  public JsonElement next() throws JsonParseException {
+    if (!hasNext()) {
+      throw new NoSuchElementException();
+    }
+    
+    try {
+      return Streams.parse(parser);
+    } catch (StackOverflowError e) {
+      throw new JsonParseException("Failed parsing JSON source to Json", e);
+    } catch (OutOfMemoryError e) {
+      throw new JsonParseException("Failed parsing JSON source to Json", e);
+    } catch (JsonParseException e) {
+      throw e.getCause() instanceof EOFException ? new NoSuchElementException() : e;
+    }
+  }
+
+  /**
+   * Returns true if a {@link JsonElement} is available on the input for consumption
+   * @return true if a {@link JsonElement} is available on the input, false otherwise
+   * @since 1.4
+   */
+  public boolean hasNext() {
+    synchronized (lock) {
+      try {
+        return parser.peek() != JsonToken.END_DOCUMENT;
+      } catch (MalformedJsonException e) {
+        throw new JsonSyntaxException(e);
+      } catch (IOException e) {
+        throw new JsonIOException(e);
+      }
+    }
+  }
+
+  /**
+   * This optional {@link Iterator} method is not relevant for stream parsing and hence is not
+   * implemented.
+   * @since 1.4
+   */
+  public void remove() {
+    throw new UnsupportedOperationException();
+  }
+}

src/com/bukkit/mcteam/gson/JsonSyntaxException.java

@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) 2010 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.bukkit.mcteam.gson;
+
+/**
+ * This exception is raised when Gson attempts to read (or write) a malformed
+ * JSON element.
+ *
+ * @author Inderjeet Singh
+ * @author Joel Leitch
+ */
+public final class JsonSyntaxException extends JsonParseException {
+
+  private static final long serialVersionUID = 1L;
+
+  public JsonSyntaxException(String msg) {
+    super(msg);
+  }
+
+  public JsonSyntaxException(String msg, Throwable cause) {
+    super(msg, cause);
+  }
+
+  /**
+   * Creates exception with the specified cause. Consider using
+   * {@link #JsonSyntaxException(String, Throwable)} instead if you can
+   * describe what actually happened.
+   *
+   * @param cause root exception that caused this exception to be thrown.
+   */
+  public JsonSyntaxException(Throwable cause) {
+    super(cause);
+  }
+}

src/com/bukkit/mcteam/gson/JsonTreeNavigator.java

@@ -0,0 +1,111 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+import java.io.IOException;
+import java.util.Map;
+
+/**
+ * A navigator to navigate a tree of JsonElement nodes in Depth-first order
+ * 
+ * @author Inderjeet Singh
+ */
+final class JsonTreeNavigator {
+  private final JsonElementVisitor visitor;
+  private final boolean visitNulls;
+
+  JsonTreeNavigator(JsonElementVisitor visitor, boolean visitNulls) {
+    this.visitor = visitor;
+    this.visitNulls = visitNulls;
+  }
+  
+  public void navigate(JsonElement element) throws IOException {
+    if (element.isJsonNull()) {
+      visitor.visitNull();
+    } else if (element.isJsonArray()) {
+      JsonArray array = element.getAsJsonArray();
+      visitor.startArray(array);
+      boolean isFirst = true;
+      for (JsonElement child : array) {
+        visitChild(array, child, isFirst);
+        if (isFirst) {
+          isFirst = false;
+        }
+      }
+      visitor.endArray(array);
+    } else if (element.isJsonObject()) {
+      JsonObject object = element.getAsJsonObject();
+      visitor.startObject(object);
+      boolean isFirst = true;
+      for (Map.Entry<String, JsonElement> member : object.entrySet()) {
+        boolean visited = visitChild(object, member.getKey(), member.getValue(), isFirst);
+        if (visited && isFirst) {
+          isFirst = false;
+        }
+      }
+      visitor.endObject(object);
+    } else { // must be JsonPrimitive
+      visitor.visitPrimitive(element.getAsJsonPrimitive());
+    }    
+  }
+
+  /**
+   * Returns true if the child was visited, false if it was skipped.
+   */
+  private boolean visitChild(JsonObject parent, String childName, JsonElement child, 
+      boolean isFirst) throws IOException {
+    if (child.isJsonNull()) {
+      if (visitNulls) {
+        visitor.visitNullObjectMember(parent, childName, isFirst);
+        navigate(child.getAsJsonNull());
+      } else { // Null value is being skipped.
+        return false;
+      }
+    } else if (child.isJsonArray()) {
+      JsonArray childAsArray = child.getAsJsonArray();
+      visitor.visitObjectMember(parent, childName, childAsArray, isFirst);
+      navigate(childAsArray);
+    } else if (child.isJsonObject()) {
+      JsonObject childAsObject = child.getAsJsonObject();
+      visitor.visitObjectMember(parent, childName, childAsObject, isFirst);
+      navigate(childAsObject);
+    } else { // is a JsonPrimitive
+      visitor.visitObjectMember(parent, childName, child.getAsJsonPrimitive(), isFirst);          
+    }
+    return true;
+  }
+
+  /**
+   * Returns true if the child was visited, false if it was skipped.
+   */
+  private void visitChild(JsonArray parent, JsonElement child, boolean isFirst) throws IOException {
+    if (child.isJsonNull()) {
+      visitor.visitNullArrayMember(parent, isFirst);
+      navigate(child);
+	  } else if (child.isJsonArray()) {
+      JsonArray childAsArray = child.getAsJsonArray();
+      visitor.visitArrayMember(parent, childAsArray, isFirst);
+      navigate(childAsArray);
+    } else if (child.isJsonObject()) {
+      JsonObject childAsObject = child.getAsJsonObject();
+      visitor.visitArrayMember(parent, childAsObject, isFirst);
+      navigate(childAsObject);
+    } else { // is a JsonPrimitive
+      visitor.visitArrayMember(parent, child.getAsJsonPrimitive(), isFirst);          
+    }
+  }
+}

src/com/bukkit/mcteam/gson/LongSerializationPolicy.java

@@ -0,0 +1,74 @@
+/*
+ * Copyright (C) 2009 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+/**
+ * Defines the expected format for a {@code long} or {@code Long} type when its serialized.
+ *
+ * @since 1.3
+ *
+ * @author Inderjeet Singh
+ * @author Joel Leitch
+ */
+public enum LongSerializationPolicy {
+  /**
+   * This is the "default" serialization policy that will output a {@code long} object as a JSON
+   * number.  For example, assume an object has a long field named "f" then the serialized output
+   * would be:
+   * {@code {"f":123}}.
+   */
+  DEFAULT(new DefaultStrategy()),
+  
+  /**
+   * Serializes a long value as a quoted string.  For example, assume an object has a long field 
+   * named "f" then the serialized output would be:
+   * {@code {"f":"123"}}.
+   */
+  STRING(new StringStrategy());
+  
+  private final Strategy strategy;
+  
+  private LongSerializationPolicy(Strategy strategy) {
+    this.strategy = strategy;
+  }
+
+  /**
+   * Serialize this {@code value} using this serialization policy.
+   *
+   * @param value the long value to be serialized into a {@link JsonElement}
+   * @return the serialized version of {@code value}
+   */
+  public JsonElement serialize(Long value) {
+    return strategy.serialize(value);
+  }
+  
+  private interface Strategy {
+    JsonElement serialize(Long value);
+  }
+  
+  private static class DefaultStrategy implements Strategy {
+    public JsonElement serialize(Long value) {
+      return new JsonPrimitive(value);
+    }
+  }
+  
+  private static class StringStrategy implements Strategy {
+    public JsonElement serialize(Long value) {
+      return new JsonPrimitive(String.valueOf(value));
+    }
+  }
+}

src/com/bukkit/mcteam/gson/LowerCamelCaseSeparatorNamingPolicy.java

@@ -0,0 +1,43 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+/**
+ * A {@link FieldNamingStrategy2} that ensures the JSON field names consist of only
+ * lower case letters and are separated by a particular {@code separatorString}.
+ *
+ *<p>The following is an example:</p>
+ * <pre>
+ * class StringWrapper {
+ *   public String AStringField = "abcd";
+ * }
+ *
+ * LowerCamelCaseSeparatorNamingPolicy policy = new LowerCamelCaseSeparatorNamingPolicy("_");
+ * String translatedFieldName =
+ *     policy.translateName(StringWrapper.class.getField("AStringField"));
+ *
+ * assert("a_string_field".equals(translatedFieldName));
+ * </pre>
+ *
+ * @author Joel Leitch
+ */
+final class LowerCamelCaseSeparatorNamingPolicy extends CompositionFieldNamingPolicy {
+
+  public LowerCamelCaseSeparatorNamingPolicy(String separatorString) {
+    super(new CamelCaseSeparatorNamingPolicy(separatorString), new LowerCaseNamingPolicy());
+  }
+}

src/com/bukkit/mcteam/gson/LowerCaseNamingPolicy.java

@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+import java.lang.annotation.Annotation;
+import java.lang.reflect.Type;
+import java.util.Collection;
+
+/**
+ * A {@link FieldNamingStrategy2} that ensures the JSON field names consist of only
+ * lower case letters.
+ *
+ * <p>The following is an example:</p>
+ * <pre>
+ * class IntWrapper {
+ *   public int integerField = 0;
+ * }
+ *
+ * LowerCaseNamingPolicy policy = new LowerCaseNamingPolicy();
+ * String translatedFieldName =
+ *     policy.translateName(IntWrapper.class.getField("integerField"));
+ *
+ * assert("integerfield".equals(translatedFieldName));
+ * </pre>
+ *
+ * @author Inderjeet Singh
+ * @author Joel Leitch
+ */
+final class LowerCaseNamingPolicy extends RecursiveFieldNamingPolicy {
+
+  @Override
+  protected String translateName(String target, Type fieldType,
+      Collection<Annotation> annotations) {
+    return target.toLowerCase();
+  }
+}

src/com/bukkit/mcteam/gson/LruCache.java

@@ -0,0 +1,66 @@
+/*
+ * Copyright (C) 2010 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+import java.util.LinkedHashMap;
+import java.util.Map;
+
+/**
+ * An implementation of the {@link Cache} interface that evict objects from the cache using an
+ * LRU (least recently used) algorithm.  Object start getting evicted from the cache once the
+ * {@code maxCapacity} is reached.
+ * 
+ * @author Inderjeet Singh
+ * @author Joel Leitch
+ */
+final class LruCache<K, V> extends LinkedHashMap<K, V> implements Cache<K, V> {
+  private static final long serialVersionUID = 1L;
+
+  private final int maxCapacity;
+
+  LruCache(int maxCapacity) {
+    super(maxCapacity, 0.7F, true);
+    this.maxCapacity = maxCapacity;
+  }
+
+  public void addElement(K key, V value) {
+    put(key, value);
+  }
+
+  @Override
+  public void clear() {
+    super.clear();
+  }
+
+  public V getElement(K key) {
+    return get(key);
+  }
+
+  public V removeElement(K key) {
+    return remove(key);
+  }
+
+  @Override
+  public int size() {
+    return super.size();
+  }
+  
+  @Override
+  protected boolean removeEldestEntry(Map.Entry<K, V> entry) {
+    return size() > maxCapacity;
+  }
+}

src/com/bukkit/mcteam/gson/MapAsArrayTypeAdapter.java

@@ -0,0 +1,168 @@
+/*
+ * Copyright (C) 2010 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+import java.lang.reflect.ParameterizedType;
+import java.lang.reflect.Type;
+import java.util.ArrayList;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * Adapts maps containing complex keys as arrays of map entries.
+ *
+ * <h3>Maps as JSON objects</h3>
+ * The standard GSON map type adapter converts Java {@link Map Maps} to JSON
+ * Objects. This requires that map keys can be serialized as strings; this is
+ * insufficient for some key types. For example, consider a map whose keys are
+ * points on a grid. The default JSON form encodes reasonably: <pre>   {@code
+ *   Map<Point, String> original = new LinkedHashMap<Point, String>();
+ *   original.put(new Point(5, 6), "a");
+ *   original.put(new Point(8, 8), "b");
+ *   System.out.println(gson.toJson(original, type));
+ * }</pre>
+ * The above code prints this JSON object:<pre>   {@code
+ *   {
+ *     "(5,6)": "a",
+ *     "(8,8)": "b"
+ *   }
+ * }</pre>
+ * But GSON is unable to deserialize this value because the JSON string name is
+ * just the {@link Object#toString() toString()} of the map key. Attempting to
+ * convert the above JSON to an object fails with a parse exception:
+ * <pre>com.bukkit.mcteam.gson.JsonParseException: Expecting object found: "(5,6)"
+ *   at com.bukkit.mcteam.gson.JsonObjectDeserializationVisitor.visitFieldUsingCustomHandler
+ *   at com.bukkit.mcteam.gson.ObjectNavigator.navigateClassFields
+ *   ...</pre>
+ *
+ * <h3>Maps as JSON arrays</h3>
+ * An alternative approach taken by this type adapter is to encode maps as
+ * arrays of map entries. Each map entry is a two element array containing a key
+ * and a value. This approach is more flexible because any type can be used as
+ * the map's key; not just strings. But it's also less portable because the
+ * receiver of such JSON must be aware of the map entry convention.
+ *
+ * <p>Register this adapter when you are creating your GSON instance.
+ * <pre>   {@code
+ *   Gson gson = new GsonBuilder()
+ *     .registerTypeAdapter(Map.class, new MapAsArrayTypeAdapter())
+ *     .create();
+ * }</pre>
+ * This will change the structure of the JSON emitted by the code above. Now we
+ * get an array. In this case the arrays elements are map entries:
+ * <pre>   {@code
+ *   [
+ *     [
+ *       {
+ *         "x": 5,
+ *         "y": 6
+ *       },
+ *       "a",
+ *     ],
+ *     [
+ *       {
+ *         "x": 8,
+ *         "y": 8
+ *       },
+ *       "b"
+ *     ]
+ *   ]
+ * }</pre>
+ * This format will serialize and deserialize just fine as long as this adapter
+ * is registered.
+ *
+ * <p>This adapter returns regular JSON objects for maps whose keys are not
+ * complex. A key is complex if its JSON-serialized form is an array or an
+ * object.
+ */
+public final class MapAsArrayTypeAdapter
+    implements JsonSerializer<Map<?, ?>>, JsonDeserializer<Map<?, ?>> {
+
+  public Map<?, ?> deserialize(JsonElement json, Type typeOfT,
+      JsonDeserializationContext context) throws JsonParseException {
+    Map<Object, Object> result = new LinkedHashMap<Object, Object>();
+    Type[] keyAndValueType = typeToTypeArguments(typeOfT);
+    if (json.isJsonArray()) {
+      JsonArray array = json.getAsJsonArray();
+      for (int i = 0; i < array.size(); i++) {
+        JsonArray entryArray = array.get(i).getAsJsonArray();
+        Object k = context.deserialize(entryArray.get(0), keyAndValueType[0]);
+        Object v = context.deserialize(entryArray.get(1), keyAndValueType[1]);
+        result.put(k, v);
+      }
+      checkSize(array, array.size(), result, result.size());
+    } else {
+      JsonObject object = json.getAsJsonObject();
+      for (Map.Entry<String, JsonElement> entry : object.entrySet()) {
+        Object k = context.deserialize(new JsonPrimitive(entry.getKey()), keyAndValueType[0]);
+        Object v = context.deserialize(entry.getValue(), keyAndValueType[1]);
+        result.put(k, v);
+      }
+      checkSize(object, object.entrySet().size(), result, result.size());
+    }
+    return result;
+  }
+
+  public JsonElement serialize(Map<?, ?> src, Type typeOfSrc, JsonSerializationContext context) {
+    Type[] keyAndValueType = typeToTypeArguments(typeOfSrc);
+    boolean serializeAsArray = false;
+    List<JsonElement> keysAndValues = new ArrayList<JsonElement>();
+    for (Map.Entry<?, ?> entry : src.entrySet()) {
+      JsonElement key = context.serialize(entry.getKey(), keyAndValueType[0]);
+      serializeAsArray |= key.isJsonObject() || key.isJsonArray();
+      keysAndValues.add(key);
+      keysAndValues.add(context.serialize(entry.getValue(), keyAndValueType[1]));
+    }
+
+    if (serializeAsArray) {
+      JsonArray result = new JsonArray();
+      for (int i = 0; i < keysAndValues.size(); i+=2) {
+        JsonArray entryArray = new JsonArray();
+        entryArray.add(keysAndValues.get(i));
+        entryArray.add(keysAndValues.get(i + 1));
+        result.add(entryArray);
+      }
+      return result;
+    } else {
+      JsonObject result = new JsonObject();
+      for (int i = 0; i < keysAndValues.size(); i+=2) {
+        result.add(keysAndValues.get(i).getAsString(), keysAndValues.get(i + 1));
+      }
+      checkSize(src, src.size(), result, result.entrySet().size());
+      return result;
+    }
+  }
+
+  private Type[] typeToTypeArguments(Type typeOfT) {
+    if (typeOfT instanceof ParameterizedType) {
+      Type[] typeArguments = ((ParameterizedType) typeOfT).getActualTypeArguments();
+      if (typeArguments.length != 2) {
+        throw new IllegalArgumentException("MapAsArrayTypeAdapter cannot handle " + typeOfT);
+      }
+      return typeArguments;
+    }
+    return new Type[] { Object.class, Object.class };
+  }
+
+  private void checkSize(Object input, int inputSize, Object output, int outputSize) {
+    if (inputSize != outputSize) {
+      throw new JsonSyntaxException("Input size " + inputSize + " != output size " + outputSize
+          + " for input " + input + " and output " + output);
+    }
+  }
+}

src/com/bukkit/mcteam/gson/MappedObjectConstructor.java

@@ -0,0 +1,112 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+import java.lang.reflect.AccessibleObject;
+import java.lang.reflect.Array;
+import java.lang.reflect.Constructor;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Type;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+/**
+ * This class contains a mapping of all the application specific
+ * {@link InstanceCreator} instances.  Registering an {@link InstanceCreator}
+ * with this class will override the default object creation that is defined
+ * by the ObjectConstructor that this class is wrapping.  Using this class
+ * with the JSON framework provides the application with "pluggable" modules
+ * to customize framework to suit the application's needs.
+ *
+ * @author Joel Leitch
+ */
+final class MappedObjectConstructor implements ObjectConstructor {
+  private static final Logger log = Logger.getLogger(MappedObjectConstructor.class.getName());
+
+  private final ParameterizedTypeHandlerMap<InstanceCreator<?>> instanceCreatorMap;
+  
+  public MappedObjectConstructor(
+      ParameterizedTypeHandlerMap<InstanceCreator<?>> instanceCreators) {
+    instanceCreatorMap = instanceCreators;
+  }
+
+  @SuppressWarnings("unchecked")
+  public <T> T construct(Type typeOfT) {
+    InstanceCreator<T> creator = (InstanceCreator<T>) instanceCreatorMap.getHandlerFor(typeOfT);
+    if (creator != null) {
+      return creator.createInstance(typeOfT);
+    }
+    return (T) constructWithNoArgConstructor(typeOfT);
+  }
+
+  public Object constructArray(Type type, int length) {
+    return Array.newInstance(TypeUtils.toRawClass(type), length);
+  }
+
+  private <T> T constructWithNoArgConstructor(Type typeOfT) {
+    try {
+      Constructor<T> constructor = getNoArgsConstructor(typeOfT);
+      if (constructor == null) {
+        throw new RuntimeException(("No-args constructor for " + typeOfT + " does not exist. "
+            + "Register an InstanceCreator with Gson for this type to fix this problem."));
+      }
+      return constructor.newInstance();
+    } catch (InstantiationException e) {
+      throw new RuntimeException(("Unable to invoke no-args constructor for " + typeOfT + ". "
+          + "Register an InstanceCreator with Gson for this type may fix this problem."), e);
+    } catch (IllegalAccessException e) {
+      throw new RuntimeException(("Unable to invoke no-args constructor for " + typeOfT + ". "
+          + "Register an InstanceCreator with Gson for this type may fix this problem."), e);
+    } catch (InvocationTargetException e) {
+      throw new RuntimeException(("Unable to invoke no-args constructor for " + typeOfT + ". "
+          + "Register an InstanceCreator with Gson for this type may fix this problem."), e);
+    }
+  }
+
+  @SuppressWarnings({"unchecked", "cast"})
+  private <T> Constructor<T> getNoArgsConstructor(Type typeOfT) {
+    TypeInfo typeInfo = new TypeInfo(typeOfT);
+    Class<T> clazz = (Class<T>) typeInfo.getRawClass();
+    Constructor<T>[] declaredConstructors = (Constructor<T>[]) clazz.getDeclaredConstructors();
+    AccessibleObject.setAccessible(declaredConstructors, true);
+    for (Constructor<T> constructor : declaredConstructors) {
+      if (constructor.getParameterTypes().length == 0) {
+        return constructor;
+      }
+    }
+    return null;
+  }
+
+  /**
+   * Use this methods to register an {@link InstanceCreator} for a new type.
+   *
+   * @param <T> the type of class to be mapped with its "creator"
+   * @param typeOfT the instance type that will be created
+   * @param creator the {@link InstanceCreator} instance to register
+   */
+  <T> void register(Type typeOfT, InstanceCreator<? extends T> creator) {
+    if (instanceCreatorMap.hasSpecificHandlerFor(typeOfT)) {
+      log.log(Level.WARNING, "Overriding the existing InstanceCreator for {0}", typeOfT);
+    }
+    instanceCreatorMap.register(typeOfT, creator);
+  }
+  
+  @Override
+  public String toString() {
+    return instanceCreatorMap.toString();
+  }
+}

src/com/bukkit/mcteam/gson/MemoryRefStack.java

@@ -0,0 +1,87 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+import java.util.Stack;
+
+/**
+ * A stack data structure that only does a memory reference comparison
+ * when looking for a particular item in the stack.  This stack does
+ * not allow {@code null} values to be added.
+ *
+ * @author Joel Leitch
+ */
+final class MemoryRefStack {
+  private final Stack<ObjectTypePair> stack = new Stack<ObjectTypePair>();
+
+  /**
+   * Adds a new element to the top of the stack.
+   *
+   * @param obj the object to add to the stack
+   * @return the object that was added
+   */
+  public ObjectTypePair push(ObjectTypePair obj) {
+    Preconditions.checkNotNull(obj);
+
+    return stack.push(obj);
+  }
+
+  /**
+   * Removes the top element from the stack.
+   *
+   * @return the element being removed from the stack
+   * @throws java.util.EmptyStackException thrown if the stack is empty
+   */
+  public ObjectTypePair pop() {
+    return stack.pop();
+  }
+
+  public boolean isEmpty() {
+    return stack.isEmpty();
+  }
+
+  /**
+   * Retrieves the item from the top of the stack, but does not remove it.
+   *
+   * @return the item from the top of the stack
+   * @throws java.util.EmptyStackException thrown if the stack is empty
+   */
+  public ObjectTypePair peek() {
+    return stack.peek();
+  }
+
+  /**
+   * Performs a memory reference check to see it the {@code obj} exists in
+   * the stack.
+   *
+   * @param obj the object to search for in the stack
+   * @return true if this object is already in the stack otherwise false
+   */
+  public boolean contains(ObjectTypePair obj) {
+    if (obj == null) {
+      return false;
+    }
+
+    for (ObjectTypePair stackObject : stack) {
+      if (stackObject.getObject() == obj.getObject()
+          && stackObject.type.equals(obj.type) ) {
+        return true;
+      }
+    }
+    return false;
+  }
+}

src/com/bukkit/mcteam/gson/ModifierBasedExclusionStrategy.java

@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+import java.util.Collection;
+import java.util.HashSet;
+
+/**
+ * Exclude fields based on particular field modifiers.  For a list of possible
+ * modifiers, see {@link java.lang.reflect.Modifier}.
+ *
+ * @author Inderjeet Singh
+ * @author Joel Leitch
+ */
+final class ModifierBasedExclusionStrategy implements ExclusionStrategy {
+  private final Collection<Integer> modifiers;
+
+  public ModifierBasedExclusionStrategy(int... modifiers) {
+    this.modifiers = new HashSet<Integer>();
+    if (modifiers != null) {
+      for (int modifier : modifiers) {
+        this.modifiers.add(modifier);
+      }
+    }
+  }
+
+  public boolean shouldSkipField(FieldAttributes f) {
+    for (int modifier : modifiers) {
+      if (f.hasModifier(modifier)) {
+        return true;
+      }
+    }
+    return false;
+  }
+
+  public boolean shouldSkipClass(Class<?> clazz) {
+    return false;
+  }
+}

src/com/bukkit/mcteam/gson/ModifyFirstLetterNamingPolicy.java

@@ -0,0 +1,107 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+import java.lang.annotation.Annotation;
+import java.lang.reflect.Type;
+import java.util.Collection;
+
+/**
+ * A {@link FieldNamingStrategy2} that ensures the JSON field names begins with
+ * an upper case letter.
+ *
+ *<p>The following is an example:</p>
+ * <pre>
+ * class StringWrapper {
+ *   public String stringField = "abcd";
+ *   public String _stringField = "efg";
+ * }
+ *
+ * ModifyFirstLetterNamingPolicy policy =
+ *     new ModifyFirstLetterNamingPolicy(LetterModifier.UPPER);
+ * String translatedFieldName =
+ *     policy.translateName(StringWrapper.class.getField("stringField"));
+ *
+ * assert("StringField".equals(translatedFieldName));
+ *
+ * String translatedFieldName =
+ *     policy.translateName(StringWrapper.class.getField("_stringField"));
+ *
+ * assert("_StringField".equals(translatedFieldName));
+ * </pre>
+ *
+ * @author Joel Leitch
+ */
+final class ModifyFirstLetterNamingPolicy extends RecursiveFieldNamingPolicy {
+
+  public enum LetterModifier {
+    UPPER,
+    LOWER;
+  }
+
+  private final LetterModifier letterModifier;
+
+  /**
+   * Creates a new ModifyFirstLetterNamingPolicy that will either modify the first letter of the
+   * target name to either UPPER case or LOWER case depending on the {@code modifier} parameter.
+   *
+   * @param modifier the type of modification that should be performed
+   * @throws IllegalArgumentException if {@code modifier} is null
+   */
+  public ModifyFirstLetterNamingPolicy(LetterModifier modifier) {
+    Preconditions.checkNotNull(modifier);
+    this.letterModifier = modifier;
+  }
+
+  @Override
+  protected String translateName(String target, Type fieldType,
+      Collection<Annotation> annotations) {
+    StringBuilder fieldNameBuilder = new StringBuilder();
+    int index = 0;
+    char firstCharacter = target.charAt(index);
+
+    while (index < target.length() - 1) {
+      if (Character.isLetter(firstCharacter)) {
+        break;
+      }
+
+      fieldNameBuilder.append(firstCharacter);
+      firstCharacter = target.charAt(++index);
+    }
+
+    if (index == target.length()) {
+      return fieldNameBuilder.toString();
+    }
+
+    boolean capitalizeFirstLetter = (letterModifier == LetterModifier.UPPER);
+    if (capitalizeFirstLetter && !Character.isUpperCase(firstCharacter)) {
+      String modifiedTarget = modifyString(Character.toUpperCase(firstCharacter), target, ++index);
+      return fieldNameBuilder.append(modifiedTarget).toString();
+    } else if (!capitalizeFirstLetter && Character.isUpperCase(firstCharacter)) {
+      String modifiedTarget = modifyString(Character.toLowerCase(firstCharacter), target, ++index);
+      return fieldNameBuilder.append(modifiedTarget).toString();
+    } else {
+      return target;
+    }
+  }
+
+  private String modifyString(char firstCharacter, String srcString, int indexOfSubstring) {
+    return indexOfSubstring < srcString.length() ?
+        firstCharacter + srcString.substring(indexOfSubstring)
+        : String.valueOf(firstCharacter);
+  }
+}

src/com/bukkit/mcteam/gson/NullExclusionStrategy.java

@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+
+/**
+ * This acts as a "Null Object" pattern for the {@link ExclusionStrategy}.
+ * Passing an instance of this class into the {@link ObjectNavigator} will
+ * make the {@link ObjectNavigator} parse/visit every field of the object
+ * being navigated.
+ *
+ * @author Joel Leitch
+ */
+final class NullExclusionStrategy implements ExclusionStrategy {
+
+  public boolean shouldSkipField(FieldAttributes f) {
+    return false;
+  }
+
+  public boolean shouldSkipClass(Class<?> clazz) {
+    return false;
+  }
+}

src/com/bukkit/mcteam/gson/ObjectConstructor.java

@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+import java.lang.reflect.Type;
+
+/**
+ * Defines a generic object construction factory.  The purpose of this class
+ * is to construct a default instance of a class that can be used for object
+ * navigation while deserialization from its JSON representation.
+ *
+ * @author Inderjeet Singh
+ * @author Joel Leitch
+ */
+interface ObjectConstructor {
+
+  /**
+   * Creates a new instance of the given type.
+   *
+   * @param typeOfT the class type that should be instantiated
+   * @return a default instance of the provided class.
+   */
+  public <T> T construct(Type typeOfT);
+
+  /**
+   * Constructs an array type of the provided length.
+   *
+   * @param typeOfArrayElements type of objects in the array
+   * @param length size of the array
+   * @return new array of size length
+   */
+  public Object constructArray(Type typeOfArrayElements, int length);
+}

src/com/bukkit/mcteam/gson/ObjectNavigator.java

@@ -0,0 +1,169 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+import java.lang.reflect.AccessibleObject;
+import java.lang.reflect.Field;
+import java.lang.reflect.Type;
+
+/**
+ * Provides ability to apply a visitor to an object and all of its fields
+ * recursively.
+ * 
+ * @author Inderjeet Singh
+ * @author Joel Leitch
+ */
+final class ObjectNavigator {
+
+  public interface Visitor {
+    public void start(ObjectTypePair node);
+
+    public void end(ObjectTypePair node);
+
+    /**
+     * This is called before the object navigator starts visiting the current
+     * object
+     */
+    void startVisitingObject(Object node);
+
+    /**
+     * This is called to visit the current object if it is an array
+     */
+    void visitArray(Object array, Type componentType);
+
+    /**
+     * This is called to visit an object field of the current object
+     */
+    void visitObjectField(FieldAttributes f, Type typeOfF, Object obj);
+
+    /**
+     * This is called to visit an array field of the current object
+     */
+    void visitArrayField(FieldAttributes f, Type typeOfF, Object obj);
+
+    /**
+     * This is called to visit an object using a custom handler
+     * 
+     * @return true if a custom handler exists, false otherwise
+     */
+    public boolean visitUsingCustomHandler(ObjectTypePair objTypePair);
+
+    /**
+     * This is called to visit a field of the current object using a custom
+     * handler
+     */
+    public boolean visitFieldUsingCustomHandler(FieldAttributes f, Type actualTypeOfField,
+        Object parent);
+
+    /**
+     * Retrieve the current target
+     */
+    Object getTarget();
+
+    void visitPrimitive(Object primitive);
+  }
+
+  private final ExclusionStrategy exclusionStrategy;
+  private final ObjectTypePair objTypePair;
+
+  /**
+   * @param objTypePair
+   *          The object,type (fully genericized) being navigated
+   * @param exclusionStrategy
+   *          the concrete strategy object to be used to filter out fields of an
+   *          object.
+   */
+  ObjectNavigator(ObjectTypePair objTypePair, ExclusionStrategy exclusionStrategy) {
+    Preconditions.checkNotNull(exclusionStrategy);
+
+    this.objTypePair = objTypePair;
+    this.exclusionStrategy = exclusionStrategy;
+  }
+
+  /**
+   * Navigate all the fields of the specified object. If a field is null, it
+   * does not get visited.
+   */
+  public void accept(Visitor visitor) {
+    TypeInfo objTypeInfo = new TypeInfo(objTypePair.type);
+    if (exclusionStrategy.shouldSkipClass(objTypeInfo.getRawClass())) {
+      return;
+    }
+    boolean visitedWithCustomHandler = visitor.visitUsingCustomHandler(objTypePair);
+    if (!visitedWithCustomHandler) {
+      Object obj = objTypePair.getObject();
+      Object objectToVisit = (obj == null) ? visitor.getTarget() : obj;
+      if (objectToVisit == null) {
+        return;
+      }
+      objTypePair.setObject(objectToVisit);
+      visitor.start(objTypePair);
+      try {
+        if (objTypeInfo.isArray()) {
+          visitor.visitArray(objectToVisit, objTypePair.type);
+        } else if (objTypeInfo.getActualType() == Object.class
+            && isPrimitiveOrString(objectToVisit)) {
+          // TODO(Joel): this is only used for deserialization of "primitives"
+          // we should rethink this!!!
+          visitor.visitPrimitive(objectToVisit);
+          objectToVisit = visitor.getTarget();
+        } else {
+          visitor.startVisitingObject(objectToVisit);
+          ObjectTypePair currObjTypePair = objTypePair.toMoreSpecificType();
+          Class<?> topLevelClass = new TypeInfo(currObjTypePair.type).getRawClass();
+          for (Class<?> curr = topLevelClass; curr != null && !curr.equals(Object.class); curr =
+              curr.getSuperclass()) {
+            if (!curr.isSynthetic()) {
+              navigateClassFields(objectToVisit, curr, visitor);
+            }
+          }
+        }
+      } finally {
+        visitor.end(objTypePair);
+      }
+    }
+  }
+
+  private boolean isPrimitiveOrString(Object objectToVisit) {
+    Class<?> realClazz = objectToVisit.getClass();
+    return realClazz == Object.class || realClazz == String.class
+        || Primitives.unwrap(realClazz).isPrimitive();
+  }
+
+  private void navigateClassFields(Object obj, Class<?> clazz, Visitor visitor) {
+    Field[] fields = clazz.getDeclaredFields();
+    AccessibleObject.setAccessible(fields, true);
+    for (Field f : fields) {
+      FieldAttributes fieldAttributes = new FieldAttributes(clazz, f);
+      if (exclusionStrategy.shouldSkipField(fieldAttributes)
+          || exclusionStrategy.shouldSkipClass(fieldAttributes.getDeclaredClass())) {
+        continue; // skip
+      }
+      TypeInfo fieldTypeInfo = TypeInfoFactory.getTypeInfoForField(f, objTypePair.type);
+      Type declaredTypeOfField = fieldTypeInfo.getActualType();
+      boolean visitedWithCustomHandler =
+        visitor.visitFieldUsingCustomHandler(fieldAttributes, declaredTypeOfField, obj);
+      if (!visitedWithCustomHandler) {
+        if (fieldTypeInfo.isArray()) {
+          visitor.visitArrayField(fieldAttributes, declaredTypeOfField, obj);
+        } else {
+          visitor.visitObjectField(fieldAttributes, declaredTypeOfField, obj);
+        }
+      }
+    }
+  }
+}

src/com/bukkit/mcteam/gson/ObjectNavigatorFactory.java

@@ -0,0 +1,61 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+/**
+ * A factory class used to simplify {@link ObjectNavigator} creation.
+ * This object holds on to a reference of the {@link ExclusionStrategy}
+ * that you'd like to use with the {@link ObjectNavigator}.
+ *
+ * @author Joel Leitch
+ */
+final class ObjectNavigatorFactory {
+  private final ExclusionStrategy strategy;
+  private final FieldNamingStrategy2 fieldNamingPolicy;
+
+  /**
+   * Creates a factory object that will be able to create new
+   * {@link ObjectNavigator}s with the provided {@code strategy}
+   *
+   * @param strategy the exclusion strategy to use with every instance that
+   *        is created by this factory instance.
+   * @param fieldNamingPolicy the naming policy that should be applied to field
+   *        names
+   */
+  public ObjectNavigatorFactory(ExclusionStrategy strategy, FieldNamingStrategy2 fieldNamingPolicy) {
+    Preconditions.checkNotNull(fieldNamingPolicy);
+    this.strategy = (strategy == null ? new NullExclusionStrategy() : strategy);
+    this.fieldNamingPolicy = fieldNamingPolicy;
+  }
+
+  /**
+   * Creates a new {@link ObjectNavigator} for this {@code srcObject},
+   * {@code type} pair.
+   *
+   * @param objTypePair The object,type (fully genericized) being navigated
+   * @return a new instance of a {@link ObjectNavigator} ready to navigate the
+   *         {@code srcObject} while taking into consideration the
+   *         {@code type}.
+   */
+  public ObjectNavigator create(ObjectTypePair objTypePair) {
+    return new ObjectNavigator(objTypePair, strategy);
+  }
+
+  FieldNamingStrategy2 getFieldNamingPolicy() {
+    return fieldNamingPolicy;
+  }
+}

src/com/bukkit/mcteam/gson/ObjectTypePair.java

@@ -0,0 +1,136 @@
+/*
+ * Copyright (C) 2009 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.bukkit.mcteam.gson;
+
+import java.lang.reflect.Type;
+
+/**
+ * A holder class for an object and its type
+ *
+ * @author Inderjeet Singh
+ */
+final class ObjectTypePair {
+  private Object obj;
+  final Type type;
+  private final boolean preserveType;
+
+  ObjectTypePair(Object obj, Type type, boolean preserveType) {
+    this.obj = obj;
+    this.type = type;
+    this.preserveType = preserveType;
+  }
+
+  Object getObject() {
+    return obj;
+  }
+
+  void setObject(Object obj) {
+    this.obj = obj;
+  }
+
+  Type getType() {
+    return type;
+  }
+
+  @Override
+  public String toString() {
+    return String.format("preserveType: %b, type: %s, obj: %s", preserveType, type, obj);
+  }
+
+  <HANDLER> Pair<HANDLER, ObjectTypePair> getMatchingHandler(
+      ParameterizedTypeHandlerMap<HANDLER> handlers) {
+    HANDLER handler = null;
+    if (!preserveType && obj != null) {
+      // First try looking up the handler for the actual type
+      ObjectTypePair moreSpecificType = toMoreSpecificType();    
+      handler = handlers.getHandlerFor(moreSpecificType.type);
+      if (handler != null) {
+        return new Pair<HANDLER, ObjectTypePair>(handler, moreSpecificType);
+      }
+    }
+    // Try the specified type
+    handler = handlers.getHandlerFor(type);
+    return handler == null ? null : new Pair<HANDLER, ObjectTypePair>(handler, this);
+  }
+
+  ObjectTypePair toMoreSpecificType() {    
+    if (preserveType || obj == null) {
+      return this;
+    }
+    Type actualType = getActualTypeIfMoreSpecific(type, obj.getClass());
+    if (actualType == type) {
+      return this;
+    }
+    return new ObjectTypePair(obj, actualType, preserveType);
+  }
+
+  // This takes care of situations where the field was declared as an Object, but the
+  // actual value contains something more specific. See Issue 54.
+  // TODO (inder): This solution will not work if the field is of a generic type, but 
+  // the actual object is of a raw type (which is a sub-class of the generic type).
+  static Type getActualTypeIfMoreSpecific(Type type, Class<?> actualClass) {
+    if (type instanceof Class<?>) {
+      Class<?> typeAsClass = (Class<?>) type;
+      if (typeAsClass.isAssignableFrom(actualClass)) {
+        type = actualClass;
+      }
+      if (type == Object.class) {
+        type = actualClass;
+      } 
+    }
+    return type;
+  }
+
+  @Override
+  public int hashCode() {
+    // Not using type.hashCode() since I am not sure if the subclasses of type reimplement
+    // hashCode() to be equal for equal types
+    return ((obj == null) ? 31 : obj.hashCode());
+  }
+
+  @Override
+  public boolean equals(Object obj) {
+    if (this == obj) {
+      return true;
+    }
+    if (obj == null) {
+      return false;
+    }
+    if (getClass() != obj.getClass()) {
+      return false;
+    }
+    ObjectTypePair other = (ObjectTypePair) obj;
+    if (this.obj == null) {
+      if (other.obj != null) {
+        return false;
+      }
+    } else if (this.obj != other.obj) { // Checking for reference equality
+      return false;
+    }
+    if (type == null) {
+      if (other.type != null) {
+        return false;
+      }
+    } else if (!type.equals(other.type)) {
+      return false;
+    }
+    return preserveType == other.preserveType;
+  }
+
+  public boolean isPreserveType() {
+    return preserveType;
+  }
+}

src/com/bukkit/mcteam/gson/Pair.java

@@ -0,0 +1,62 @@
+/*
+ * Copyright (C) 2009 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+/**
+ * A simple object that holds onto a pair of object references, first and second.
+ *
+ * @author Inderjeet Singh
+ * @author Joel Leitch
+ *
+ * @param <FIRST>
+ * @param <SECOND>
+ */
+final class Pair<FIRST, SECOND> {
+
+  final FIRST first;
+  final SECOND second;
+
+  Pair(FIRST first, SECOND second) {
+    this.first = first;
+    this.second = second;
+  }
+
+  @Override
+  public int hashCode() {
+    return 17 * ((first != null) ? first.hashCode() : 0)
+        + 17 * ((second != null) ? second.hashCode() : 0);
+  }
+
+  @Override
+  public boolean equals(Object o) {
+    if (!(o instanceof Pair<?, ?>)) {
+      return false;
+    }
+
+    Pair<?, ?> that = (Pair<?, ?>) o;
+    return equal(this.first, that.first) && equal(this.second, that.second);
+  }
+
+  private static boolean equal(Object a, Object b) {
+    return a == b || (a != null && a.equals(b));
+  }
+
+  @Override
+  public String toString() {
+    return String.format("{%s,%s}", first, second);
+  }
+}

src/com/bukkit/mcteam/gson/ParameterizedTypeHandlerMap.java

@@ -0,0 +1,200 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+import java.lang.reflect.Type;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+/**
+ * A map that provides ability to associate handlers for a specific type or all
+ * of its sub-types
+ * 
+ * @author Inderjeet Singh
+ * @author Joel Leitch
+ * 
+ * @param <T> The handler that will be looked up by type
+ */
+final class ParameterizedTypeHandlerMap<T> {
+  private static final Logger logger =
+      Logger.getLogger(ParameterizedTypeHandlerMap.class.getName());
+  private final Map<Type, T> map = new HashMap<Type, T>();
+  private final List<Pair<Class<?>, T>> typeHierarchyList = new ArrayList<Pair<Class<?>, T>>();
+  private boolean modifiable = true;
+
+  public synchronized void registerForTypeHierarchy(Class<?> typeOfT, T value) {
+    Pair<Class<?>, T> pair = new Pair<Class<?>, T>(typeOfT, value);
+    registerForTypeHierarchy(pair);
+  }
+
+  public synchronized void registerForTypeHierarchy(Pair<Class<?>, T> pair) {
+    if (!modifiable) {
+      throw new IllegalStateException("Attempted to modify an unmodifiable map.");
+    }
+    int index = getIndexOfSpecificHandlerForTypeHierarchy(pair.first);
+    if (index >= 0) {
+      logger.log(Level.WARNING, "Overriding the existing type handler for {0}", pair.first);
+      typeHierarchyList.remove(index);
+    }
+    index = getIndexOfAnOverriddenHandler(pair.first);
+    if (index >= 0) {
+      throw new IllegalArgumentException("The specified type handler for type " + pair.first
+          + " hides the previously registered type hierarchy handler for "
+          + typeHierarchyList.get(index).first + ". Gson does not allow this.");
+    }
+    // We want stack behavior for adding to this list. A type adapter added subsequently should
+    // override a previously registered one.
+    typeHierarchyList.add(0, pair);
+  }
+
+  private int getIndexOfAnOverriddenHandler(Class<?> type) {
+    for (int i = typeHierarchyList.size()-1; i >= 0; --i) {
+      Pair<Class<?>, T> entry = typeHierarchyList.get(i);
+      if (type.isAssignableFrom(entry.first)) {
+        return i;
+      }
+    }
+    return -1;
+  }
+
+  public synchronized void register(Type typeOfT, T value) {
+    if (!modifiable) {
+      throw new IllegalStateException("Attempted to modify an unmodifiable map.");
+    }
+    if (hasSpecificHandlerFor(typeOfT)) {
+      logger.log(Level.WARNING, "Overriding the existing type handler for {0}", typeOfT);
+    }
+    map.put(typeOfT, value);
+  }
+
+  public synchronized void registerIfAbsent(ParameterizedTypeHandlerMap<T> other) {
+    if (!modifiable) {
+      throw new IllegalStateException("Attempted to modify an unmodifiable map.");
+    }
+    for (Map.Entry<Type, T> entry : other.map.entrySet()) {
+      if (!map.containsKey(entry.getKey())) {
+        register(entry.getKey(), entry.getValue());
+      }
+    }
+    // Quite important to traverse the typeHierarchyList from stack bottom first since
+    // we want to register the handlers in the same order to preserve priority order
+    for (int i = other.typeHierarchyList.size()-1; i >= 0; --i) {
+      Pair<Class<?>, T> entry = other.typeHierarchyList.get(i);
+      int index = getIndexOfSpecificHandlerForTypeHierarchy(entry.first);
+      if (index < 0) {
+        registerForTypeHierarchy(entry);
+      }
+    }
+  }
+
+  public synchronized void registerIfAbsent(Type typeOfT, T value) {
+    if (!modifiable) {
+      throw new IllegalStateException("Attempted to modify an unmodifiable map.");
+    }
+    if (!map.containsKey(typeOfT)) {
+      register(typeOfT, value);
+    }
+  }
+
+  public synchronized void makeUnmodifiable() {
+    modifiable = false;
+  }
+
+  public synchronized T getHandlerFor(Type type) {
+    T handler = map.get(type);
+    if (handler == null) {
+      Class<?> rawClass = TypeUtils.toRawClass(type);
+      if (rawClass != type) {
+        handler = getHandlerFor(rawClass);
+      }
+      if (handler == null) {
+        // check if something registered for type hierarchy
+        handler = getHandlerForTypeHierarchy(rawClass);
+      }
+    }
+    return handler;
+  }
+
+  private T getHandlerForTypeHierarchy(Class<?> type) {
+    for (Pair<Class<?>, T> entry : typeHierarchyList) {
+      if (entry.first.isAssignableFrom(type)) {
+        return entry.second;
+      }
+    }
+    return null;
+  }
+
+  public synchronized boolean hasSpecificHandlerFor(Type type) {
+    return map.containsKey(type);
+  }
+
+  private synchronized int getIndexOfSpecificHandlerForTypeHierarchy(Class<?> type) {
+    for (int i = typeHierarchyList.size()-1; i >= 0; --i) {
+      if (type.equals(typeHierarchyList.get(i).first)) {
+        return i;
+      }
+    }
+    return -1;
+  }
+
+  public synchronized ParameterizedTypeHandlerMap<T> copyOf() {
+    ParameterizedTypeHandlerMap<T> copy = new ParameterizedTypeHandlerMap<T>();
+    for (Map.Entry<Type, T> entry : map.entrySet()) {
+      copy.register(entry.getKey(), entry.getValue());
+    }
+    for (Pair<Class<?>, T> entry : typeHierarchyList) {
+      copy.registerForTypeHierarchy(entry);
+    }
+    return copy;
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder("{mapForTypeHierarchy:{");
+    boolean first = true;
+    for (Pair<Class<?>, T> entry : typeHierarchyList) {
+      if (first) {
+        first = false;
+      } else {
+        sb.append(',');
+      }
+      sb.append(typeToString(entry.first)).append(':');
+      sb.append(entry.second);
+    }
+    sb.append("},map:{");
+    first = true;
+    for (Map.Entry<Type, T> entry : map.entrySet()) {
+      if (first) {
+        first = false;
+      } else {
+        sb.append(',');
+      }
+      sb.append(typeToString(entry.getKey())).append(':');
+      sb.append(entry.getValue());
+    }
+    sb.append("}");
+    return sb.toString();
+  }
+
+  private String typeToString(Type type) {
+    return TypeUtils.toRawClass(type).getSimpleName();
+  }
+}

src/com/bukkit/mcteam/gson/ParameterizedTypeImpl.java

@@ -0,0 +1,91 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+import java.lang.reflect.ParameterizedType;
+import java.lang.reflect.Type;
+import java.util.Arrays;
+
+/**
+ * An immutable implementation of the {@link ParameterizedType} interface.  This object allows
+ * us to build a reflective {@link Type} objects on demand.  This object is used to support
+ * serialization and deserialization of classes with an {@code ParameterizedType} field where
+ * as least one of the actual type parameters is a {@code TypeVariable}.
+ *
+ * <p>Here's an example class:
+ * <pre>
+ * class Foo<T> {
+ *   private List<T> someList;
+ *
+ *   Foo(List<T> list) {
+ *     this.someList = list;
+ *   }
+ * }
+ * </pre>
+ *
+ * @author Inderjeet Singh
+ * @author Joel Leitch
+ */
+final class ParameterizedTypeImpl implements ParameterizedType {
+
+  private final Type rawType;
+  private final Type[] actualTypeArguments;
+  private final Type owner;
+
+  public ParameterizedTypeImpl(Type rawType, Type[] actualTypeArguments, Type owner) {
+    this.rawType = rawType;
+    this.actualTypeArguments = actualTypeArguments;
+    this.owner = owner;
+  }
+
+  public Type getRawType() {
+    return rawType;
+  }
+
+  public Type[] getActualTypeArguments() {
+    return actualTypeArguments;
+  }
+
+  public Type getOwnerType() {
+    return owner;
+  }
+
+  @Override
+  public boolean equals(Object o) {
+    if (!(o instanceof  ParameterizedType)) {
+      return false;
+    }
+    // Check that information is equivalent
+    ParameterizedType that = (ParameterizedType) o;
+    if (this  == that) {
+      return true;
+    }
+    Type thatOwner = that.getOwnerType();
+    Type thatRawType = that.getRawType();
+
+    return (owner == null ? thatOwner == null : owner.equals(thatOwner))
+      && (rawType == null ? thatRawType == null : rawType.equals(thatRawType))
+      && Arrays.equals(actualTypeArguments, that.getActualTypeArguments());
+  }
+
+  @Override
+  public int hashCode() {
+    return Arrays.hashCode(actualTypeArguments)
+        ^ (owner == null ? 0 : owner.hashCode())
+        ^ (rawType == null ? 0 : rawType.hashCode());
+  }
+}

src/com/bukkit/mcteam/gson/Preconditions.java

@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+/**
+ * A simple utility class used to check method Preconditions.
+ *
+ * <pre>
+ * public long divideBy(long value) {
+ *   Preconditions.checkArgument(value != 0);
+ *   return this.value / value;
+ * }
+ * </pre>
+ *
+ * @author Inderjeet Singh
+ * @author Joel Leitch
+ */
+final class Preconditions {
+  public static void checkNotNull(Object obj) {
+    checkArgument(obj != null);
+  }
+
+  public static void checkArgument(boolean condition) {
+    if (!condition) {
+      throw new IllegalArgumentException("condition failed: " + condition);
+    }
+  }
+  
+  public static void checkState(boolean condition) {
+    if (!condition) {
+      throw new IllegalArgumentException("condition failed: " + condition);
+    }
+  }
+}

src/com/bukkit/mcteam/gson/Primitives.java

@@ -0,0 +1,114 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * Contains static utility methods pertaining to primitive types and their
+ * corresponding wrapper types.
+ *
+ * @author Kevin Bourrillion
+ */
+final class Primitives {
+  private Primitives() {}
+
+  /** A map from primitive types to their corresponding wrapper types. */
+  public static final Map<Class<?>, Class<?>> PRIMITIVE_TO_WRAPPER_TYPE;
+
+  /** A map from wrapper types to their corresponding primitive types. */
+  public static final Map<Class<?>, Class<?>> WRAPPER_TO_PRIMITIVE_TYPE;
+
+  // Sad that we can't use a BiMap. :(
+  
+  static {
+    Map<Class<?>, Class<?>> primToWrap = new HashMap<Class<?>, Class<?>>(16);
+    Map<Class<?>, Class<?>> wrapToPrim = new HashMap<Class<?>, Class<?>>(16);
+
+    add(primToWrap, wrapToPrim, boolean.class, Boolean.class);
+    add(primToWrap, wrapToPrim, byte.class, Byte.class);
+    add(primToWrap, wrapToPrim, char.class, Character.class);
+    add(primToWrap, wrapToPrim, double.class, Double.class);
+    add(primToWrap, wrapToPrim, float.class, Float.class);
+    add(primToWrap, wrapToPrim, int.class, Integer.class);
+    add(primToWrap, wrapToPrim, long.class, Long.class);
+    add(primToWrap, wrapToPrim, short.class, Short.class);
+    add(primToWrap, wrapToPrim, void.class, Void.class);
+
+    PRIMITIVE_TO_WRAPPER_TYPE = Collections.unmodifiableMap(primToWrap);
+    WRAPPER_TO_PRIMITIVE_TYPE = Collections.unmodifiableMap(wrapToPrim);
+  }
+
+  private static void add(Map<Class<?>, Class<?>> forward,
+      Map<Class<?>, Class<?>> backward, Class<?> key, Class<?> value) {
+    forward.put(key, value);
+    backward.put(value, key);
+  }
+
+  /**
+   * Returns {@code true} if {@code type} is one of the nine
+   * primitive-wrapper types, such as {@link Integer}.
+   *
+   * @see Class#isPrimitive
+   */
+  public static boolean isWrapperType(Class<?> type) {
+    return WRAPPER_TO_PRIMITIVE_TYPE.containsKey(checkNotNull(type));
+  }
+
+  private static Class<?> checkNotNull(Class<?> type) {
+    Preconditions.checkNotNull(type);
+    return type;
+  }
+
+  /**
+   * Returns the corresponding wrapper type of {@code type} if it is a primitive
+   * type; otherwise returns {@code type} itself. Idempotent.
+   * <pre>
+   *     wrap(int.class) == Integer.class
+   *     wrap(Integer.class) == Integer.class
+   *     wrap(String.class) == String.class
+   * </pre>
+   */
+  public static <T> Class<T> wrap(Class<T> type) {
+    checkNotNull(type);
+
+    // cast is safe: long.class and Long.class are both of type Class<Long>
+    @SuppressWarnings("unchecked")
+    Class<T> wrapped = (Class<T>) PRIMITIVE_TO_WRAPPER_TYPE.get(type);
+    return (wrapped == null) ? type : wrapped;
+  }
+
+  /**
+   * Returns the corresponding primitive type of {@code type} if it is a
+   * wrapper type; otherwise returns {@code type} itself. Idempotent.
+   * <pre>
+   *     unwrap(Integer.class) == int.class
+   *     unwrap(int.class) == int.class
+   *     unwrap(String.class) == String.class
+   * </pre>
+   */
+  public static <T> Class<T> unwrap(Class<T> type) {
+    checkNotNull(type);
+
+    // cast is safe: long.class and Long.class are both of type Class<Long>
+    @SuppressWarnings("unchecked")
+    Class<T> unwrapped = (Class<T>) WRAPPER_TO_PRIMITIVE_TYPE.get(type);
+    return (unwrapped == null) ? type : unwrapped;
+  }  
+}

src/com/bukkit/mcteam/gson/RecursiveFieldNamingPolicy.java

@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+import java.lang.annotation.Annotation;
+import java.lang.reflect.Type;
+import java.util.Collection;
+
+/**
+ * A mechanism for providing custom field naming in Gson.  This allows the client code to translate
+ * field names into a particular convention that is not supported as a normal Java field
+ * declaration rules.  For example, Java does not support "-" characters in a field name.
+ *
+ * @author Joel Leitch
+ */
+abstract class RecursiveFieldNamingPolicy implements FieldNamingStrategy2 {
+
+  public final String translateName(FieldAttributes f) {
+    Preconditions.checkNotNull(f);
+    return translateName(f.getName(), f.getDeclaredType(), f.getAnnotations());
+  }
+
+  /**
+   * Performs the specific string translation.
+   *
+   * @param target the string object that will be manipulation/translated
+   * @param fieldType the actual type value of the field
+   * @param annotations the annotations set on the field
+   * @return the translated field name
+   */
+  protected abstract String translateName(String target, Type fieldType, Collection<Annotation> annotations);
+}

src/com/bukkit/mcteam/gson/SerializedNameAnnotationInterceptingNamingPolicy.java

@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+import com.bukkit.mcteam.gson.annotations.SerializedName;
+
+/**
+ * A {@link FieldNamingStrategy2} that acts as a chain of responsibility.  If the
+ * {@link com.bukkit.mcteam.gson.annotations.SerializedName} annotation is applied to a field then this
+ * strategy will translate the name to the {@code serializedName.value()}; otherwise it delegates
+ * to the wrapped {@link FieldNamingStrategy2}.
+ *
+ * <p>NOTE: this class performs JSON field name validation for any of the fields marked with
+ * an {@code @SerializedName} annotation.</p>
+ *
+ * @see SerializedName
+ *
+ * @author Joel Leitch
+ */
+final class SerializedNameAnnotationInterceptingNamingPolicy implements FieldNamingStrategy2 {
+  private static final JsonFieldNameValidator fieldNameValidator = new JsonFieldNameValidator();
+  private final FieldNamingStrategy2 delegate;
+
+  public SerializedNameAnnotationInterceptingNamingPolicy(FieldNamingStrategy2 delegate) {
+    this.delegate = delegate;
+  }
+
+  public String translateName(FieldAttributes f) {
+    Preconditions.checkNotNull(f);
+    SerializedName serializedName = f.getAnnotation(SerializedName.class);
+    return serializedName == null ? delegate.translateName(f)
+        : fieldNameValidator.validate(serializedName.value());
+  }
+}

src/com/bukkit/mcteam/gson/Streams.java

@@ -0,0 +1,189 @@
+/*
+ * Copyright (C) 2010 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+import com.bukkit.mcteam.gson.stream.JsonReader;
+import com.bukkit.mcteam.gson.stream.JsonWriter;
+import com.bukkit.mcteam.gson.stream.MalformedJsonException;
+import java.io.EOFException;
+import java.io.IOException;
+import java.io.Writer;
+import java.util.Map;
+
+/**
+ * Reads and writes GSON parse trees over streams.
+ */
+final class Streams {
+
+  /**
+   * Takes a reader in any state and returns the next value as a JsonElement.
+   */
+  static JsonElement parse(JsonReader reader) throws JsonParseException {
+    boolean isEmpty = true;
+    try {
+      reader.peek();
+      isEmpty = false;
+      return parseRecursive(reader);
+    } catch (EOFException e) {
+      /*
+       * For compatibility with JSON 1.5 and earlier, we return a JsonNull for
+       * empty documents instead of throwing.
+       */
+      if (isEmpty) {
+        return JsonNull.createJsonNull();
+      }
+      throw new JsonIOException(e);
+    } catch (MalformedJsonException e) {
+      throw new JsonSyntaxException(e);
+    } catch (IOException e) {
+      throw new JsonIOException(e);
+    } catch (NumberFormatException e) {
+      throw new JsonSyntaxException(e);
+    }
+  }
+
+  private static JsonElement parseRecursive(JsonReader reader) throws IOException {
+    switch (reader.peek()) {
+    case STRING:
+      return new JsonPrimitive(reader.nextString());
+    case NUMBER:
+      String number = reader.nextString();
+      return new JsonPrimitive(JsonPrimitive.stringToNumber(number));
+    case BOOLEAN:
+      return new JsonPrimitive(reader.nextBoolean());
+    case NULL:
+      reader.nextNull();
+      return JsonNull.createJsonNull();
+    case BEGIN_ARRAY:
+      JsonArray array = new JsonArray();
+      reader.beginArray();
+      while (reader.hasNext()) {
+        array.add(parseRecursive(reader));
+      }
+      reader.endArray();
+      return array;
+    case BEGIN_OBJECT:
+      JsonObject object = new JsonObject();
+      reader.beginObject();
+      while (reader.hasNext()) {
+        object.add(reader.nextName(), parseRecursive(reader));
+      }
+      reader.endObject();
+      return object;
+    case END_DOCUMENT:
+    case NAME:
+    case END_OBJECT:
+    case END_ARRAY:
+    default:
+      throw new IllegalArgumentException();
+    }
+  }
+
+  /**
+   * Writes the JSON element to the writer, recursively.
+   */
+  static void write(JsonElement element, boolean serializeNulls, JsonWriter writer)
+      throws IOException {
+    if (element == null || element.isJsonNull()) {
+      if (serializeNulls) {
+        writer.nullValue();
+      }
+
+    } else if (element.isJsonPrimitive()) {
+      JsonPrimitive primitive = element.getAsJsonPrimitive();
+      if (primitive.isNumber()) {
+        writer.value(primitive.getAsNumber());
+      } else if (primitive.isBoolean()) {
+        writer.value(primitive.getAsBoolean());
+      } else {
+        writer.value(primitive.getAsString());
+      }
+
+    } else if (element.isJsonArray()) {
+      writer.beginArray();
+      for (JsonElement e : element.getAsJsonArray()) {
+        /* always print null when its parent element is an array! */
+        if (e.isJsonNull()) {
+          writer.nullValue();
+          continue;
+        }
+        write(e, serializeNulls, writer);
+      }
+      writer.endArray();
+
+    } else if (element.isJsonObject()) {
+      writer.beginObject();
+      for (Map.Entry<String, JsonElement> e : element.getAsJsonObject().entrySet()) {
+        JsonElement value = e.getValue();
+        if (!serializeNulls && value.isJsonNull()) {
+          continue;
+        }
+        writer.name(e.getKey());
+        write(value, serializeNulls, writer);
+      }
+      writer.endObject();
+
+    } else {
+      throw new IllegalArgumentException("Couldn't write " + element.getClass());
+    }
+  }
+
+  static Writer writerForAppendable(Appendable appendable) {
+    return appendable instanceof Writer ? (Writer) appendable : new AppendableWriter(appendable);
+  }
+
+  /**
+   * Adapts an {@link Appendable} so it can be passed anywhere a {@link Writer}
+   * is used.
+   */
+  private static class AppendableWriter extends Writer {
+    private final Appendable appendable;
+    private final CurrentWrite currentWrite = new CurrentWrite();
+
+    private AppendableWriter(Appendable appendable) {
+      this.appendable = appendable;
+    }
+
+    @Override public void write(char[] chars, int offset, int length) throws IOException {
+      currentWrite.chars = chars;
+      appendable.append(currentWrite, offset, offset + length);
+    }
+
+    @Override public void write(int i) throws IOException {
+      appendable.append((char) i);
+    }
+
+    @Override public void flush() {}
+    @Override public void close() {}
+
+    /**
+     * A mutable char sequence pointing at a single char[].
+     */
+    static class CurrentWrite implements CharSequence {
+      char[] chars;
+      public int length() {
+        return chars.length;
+      }
+      public char charAt(int i) {
+        return chars[i];
+      }
+      public CharSequence subSequence(int start, int end) {
+        return new String(chars, start, end - start);
+      }
+    }
+  }
+}

src/com/bukkit/mcteam/gson/SyntheticFieldExclusionStrategy.java

@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2009 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+/**
+ * A data object that stores attributes of a field.
+ *
+ * <p>This class is immutable; therefore, it can be safely shared across threads.
+ *
+ * @author Inderjeet Singh
+ * @author Joel Leitch
+ *
+ * @since 1.4
+ */
+class SyntheticFieldExclusionStrategy implements ExclusionStrategy {
+  private final boolean skipSyntheticFields;
+
+  SyntheticFieldExclusionStrategy(boolean skipSyntheticFields) {
+    this.skipSyntheticFields = skipSyntheticFields;
+  }
+
+  public boolean shouldSkipClass(Class<?> clazz) {
+    return false;
+  }
+
+  public boolean shouldSkipField(FieldAttributes f) {
+    return skipSyntheticFields && f.isSynthetic();
+  }
+
+}

src/com/bukkit/mcteam/gson/TypeAdapter.java

@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+/**
+ * This class is responsible for adapting/converting an particular "from"
+ * instance to an instance of type "to".
+ *
+ * @author Joel Leitch
+ */
+interface TypeAdapter {
+
+  /**
+   * Adapts an object instance "from" to and instance of type "to".
+   *
+   * @param from the object to adapt
+   * @param to the Type/Class which this will convert to
+   * @return the converted "from" instance to type "to"
+   */
+  public <T> T adaptType(Object from, Class<T> to);
+}

src/com/bukkit/mcteam/gson/TypeInfo.java

@@ -0,0 +1,76 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+import java.lang.reflect.Type;
+import java.util.Collection;
+
+/**
+ * Class that provides information relevant to different parts of a type.
+ *
+ * @author Inderjeet Singh
+ * @author Joel Leitch
+ */
+class TypeInfo {
+  protected final Type actualType;
+  protected final Class<?> rawClass;
+
+  TypeInfo(Type actualType) {
+    this.actualType = actualType;
+    rawClass = TypeUtils.toRawClass(actualType);
+  }
+
+  public final Type getActualType() {
+    return actualType;
+  }
+
+  /**
+   * Returns the corresponding wrapper type of {@code type} if it is a primitive
+   * type; otherwise returns {@code type} itself. Idempotent.
+   * <pre>
+   *     wrap(int.class) == Integer.class
+   *     wrap(Integer.class) == Integer.class
+   *     wrap(String.class) == String.class
+   * </pre>
+   */
+  public final Class<?> getWrappedClass() {
+    return Primitives.wrap(rawClass);
+  }
+
+  /**
+   * @return the raw class associated with this type
+   */
+  public final Class<?> getRawClass() {
+    return rawClass;
+  }
+
+  public final boolean isCollectionOrArray() {
+    return Collection.class.isAssignableFrom(rawClass) || isArray();
+  }
+
+  public final boolean isArray() {
+    return TypeUtils.isArray(rawClass);
+  }
+
+  public final boolean isEnum() {
+    return rawClass.isEnum();
+  }
+
+  public final boolean isPrimitive() {
+    return Primitives.isWrapperType(Primitives.wrap(rawClass));
+  }
+}

src/com/bukkit/mcteam/gson/TypeInfoArray.java

@@ -0,0 +1,69 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+import java.lang.reflect.GenericArrayType;
+import java.lang.reflect.Type;
+
+/**
+ * Class to extract information about types used to define a generic array.
+ *
+ * @author Inderjeet Singh
+ * @author Joel Leitch
+ */
+final class TypeInfoArray extends TypeInfo {
+  private final Class<?> componentRawType;
+  private final Type secondLevel;
+
+  TypeInfoArray(Type type) {
+    super(type);
+    Class<?> rootComponentType = rawClass;
+    while (rootComponentType.isArray()) {
+      rootComponentType = rootComponentType.getComponentType();
+    }
+    this.componentRawType = rootComponentType;
+    this.secondLevel = extractSecondLevelType(actualType, rawClass);
+  }
+
+  private static Type extractSecondLevelType(Type actualType, Class<?> rawClass) {
+    return actualType instanceof GenericArrayType ?
+        ((GenericArrayType) actualType).getGenericComponentType() : rawClass.getComponentType();
+  }
+
+  /**
+   * @return the raw type unwrapped of the second level of array.
+   * If the object is (single-dimensional or multi-dimensional) array, it is the class of the
+   * elements of the array. For example, this method returns Foo.class for Foo[].
+   * It will return Foo[].class for Foo[][].  For Foo&lt;String&gt;[][] types, it will return the 
+   * type representing Foo&lt;String&gt;[] 
+   * (i.e. <code>new TypeToken<Foo<String>[]>() {}.getType()</code>).
+   */
+  public Type getSecondLevelType() {
+    return secondLevel;
+  }
+
+  /**
+   * @return the raw type of the root component.
+   * If the object is a single-dimensional array then the component type is the class of an
+   * element of the array.
+   * If the object is a multi-dimensional array then the component type is the class of the
+   * inner-most array element. For example, the This method will return Foo.class for Foo[][][].
+   */
+  public Class<?> getComponentRawType() {
+    return componentRawType;
+  }
+}

src/com/bukkit/mcteam/gson/TypeInfoCollection.java

@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+import java.lang.reflect.ParameterizedType;
+import java.lang.reflect.Type;
+import java.util.Collection;
+
+/**
+ * A convenience object for retrieving the map type information.
+ *
+ * @author Inderjeet Singh
+ * @author Joel Leitch
+ */
+final class TypeInfoCollection {
+  private final ParameterizedType collectionType;
+
+  public TypeInfoCollection(Type collectionType) {
+    if (!(collectionType instanceof ParameterizedType)) {
+      throw new IllegalArgumentException(
+          "Collection objects need to be parameterized unless you use a custom serializer. "
+              + "Use the com.bukkit.mcteam.gson.reflect.TypeToken to extract the ParameterizedType.");
+    }
+    TypeInfo rawType = new TypeInfo(collectionType);
+    Preconditions.checkArgument(Collection.class.isAssignableFrom(rawType.getRawClass()));
+    this.collectionType = (ParameterizedType) collectionType;
+  }
+
+  public Type getElementType() {
+    return collectionType.getActualTypeArguments()[0];
+  }
+}

src/com/bukkit/mcteam/gson/TypeInfoFactory.java

@@ -0,0 +1,175 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+import java.lang.reflect.Field;
+import java.lang.reflect.GenericArrayType;
+import java.lang.reflect.ParameterizedType;
+import java.lang.reflect.Type;
+import java.lang.reflect.TypeVariable;
+import java.lang.reflect.WildcardType;
+
+/**
+ * A static factory class used to construct the "TypeInfo" objects.
+ *
+ * @author Inderjeet Singh
+ * @author Joel Leitch
+ */
+final class TypeInfoFactory {
+
+  private TypeInfoFactory() {
+    // Not instantiable since it provides factory methods only.
+  }
+
+  public static TypeInfoArray getTypeInfoForArray(Type type) {
+    Preconditions.checkArgument(TypeUtils.isArray(type));
+    return new TypeInfoArray(type);
+  }
+
+  /**
+   * Evaluates the "actual" type for the field.  If the field is a "TypeVariable" or has a
+   * "TypeVariable" in a parameterized type then it evaluates the real type.
+   *
+   * @param f the actual field object to retrieve the type from
+   * @param typeDefiningF the type that contains the field {@code f}
+   * @return the type information for the field
+   */
+  public static TypeInfo getTypeInfoForField(Field f, Type typeDefiningF) {
+    Class<?> classDefiningF = TypeUtils.toRawClass(typeDefiningF);
+    Type type = f.getGenericType();
+    Type actualType = getActualType(type, typeDefiningF, classDefiningF);
+    return new TypeInfo(actualType);
+  }
+
+  private static Type getActualType(
+      Type typeToEvaluate, Type parentType, Class<?> rawParentClass) {
+    if (typeToEvaluate instanceof Class<?>) {
+      return typeToEvaluate;
+    } else if (typeToEvaluate instanceof ParameterizedType) {
+      ParameterizedType castedType = (ParameterizedType) typeToEvaluate;
+      Type owner = castedType.getOwnerType();
+      Type[] actualTypeParameters =
+          extractRealTypes(castedType.getActualTypeArguments(), parentType, rawParentClass);
+      Type rawType = castedType.getRawType();
+      return new ParameterizedTypeImpl(rawType, actualTypeParameters, owner);
+    } else if (typeToEvaluate instanceof GenericArrayType) {
+      GenericArrayType castedType = (GenericArrayType) typeToEvaluate;
+      Type componentType = castedType.getGenericComponentType();
+      Type actualType = getActualType(componentType, parentType, rawParentClass);
+      if (componentType.equals(actualType)) {
+        return castedType;
+      }
+      return actualType instanceof Class<?> ?
+          TypeUtils.wrapWithArray(TypeUtils.toRawClass(actualType))
+          : new GenericArrayTypeImpl(actualType);
+    } else if (typeToEvaluate instanceof TypeVariable<?>) {
+      if (parentType instanceof ParameterizedType) {
+        // The class definition has the actual types used for the type variables.
+        // Find the matching actual type for the Type Variable used for the field.
+        // For example, class Foo<A> { A a; }
+        // new Foo<Integer>(); defines the actual type of A to be Integer.
+        // So, to find the type of the field a, we will have to look at the class'
+        // actual type arguments.
+        TypeVariable<?> fieldTypeVariable = (TypeVariable<?>) typeToEvaluate;
+        TypeVariable<?>[] classTypeVariables = rawParentClass.getTypeParameters();
+        ParameterizedType objParameterizedType = (ParameterizedType) parentType;
+        int indexOfActualTypeArgument = getIndex(classTypeVariables, fieldTypeVariable);
+        Type[] actualTypeArguments = objParameterizedType.getActualTypeArguments();
+        return actualTypeArguments[indexOfActualTypeArgument];
+      } else if (typeToEvaluate instanceof TypeVariable<?>) {
+        Type theSearchedType = null;
+
+        do {
+          theSearchedType = extractTypeForHierarchy(parentType, (TypeVariable<?>) typeToEvaluate);
+        } while ((theSearchedType != null) && (theSearchedType instanceof TypeVariable<?>));
+
+        if (theSearchedType != null) {
+          return theSearchedType;
+        }
+      }
+
+      throw new UnsupportedOperationException("Expecting parameterized type, got " + parentType
+          + ".\n Are you missing the use of TypeToken idiom?\n See "
+          + "http://sites.google.com/site/gson/gson-user-guide#TOC-Serializing-and-Deserializing-Gener");
+    } else if (typeToEvaluate instanceof WildcardType) {
+      WildcardType castedType = (WildcardType) typeToEvaluate;
+      return getActualType(castedType.getUpperBounds()[0], parentType, rawParentClass);
+    } else {
+      throw new IllegalArgumentException("Type \'" + typeToEvaluate + "\' is not a Class, "
+          + "ParameterizedType, GenericArrayType or TypeVariable. Can't extract type.");
+    }
+  }
+
+  private static Type extractTypeForHierarchy(Type parentType, TypeVariable<?> typeToEvaluate) {
+    Class<?> rawParentType = null;
+    if (parentType instanceof Class<?>) {
+      rawParentType = (Class<?>) parentType;
+    } else if (parentType instanceof ParameterizedType) {
+      ParameterizedType parentTypeAsPT = (ParameterizedType) parentType;
+      rawParentType = (Class<?>) parentTypeAsPT.getRawType();
+    } else {
+      return null;
+    }
+
+    Type superClass = rawParentType.getGenericSuperclass();
+    if (superClass instanceof ParameterizedType
+        && ((ParameterizedType) superClass).getRawType() == typeToEvaluate.getGenericDeclaration()) {
+      // Evaluate type on this type
+      TypeVariable<?>[] classTypeVariables =
+          ((Class<?>) ((ParameterizedType) superClass).getRawType()).getTypeParameters();
+      int indexOfActualTypeArgument = getIndex(classTypeVariables, typeToEvaluate);
+
+      Type[] actualTypeArguments = null;
+      if (parentType instanceof Class<?>) {
+        actualTypeArguments = ((ParameterizedType) superClass).getActualTypeArguments();
+      } else if (parentType instanceof ParameterizedType) {
+        actualTypeArguments = ((ParameterizedType) parentType).getActualTypeArguments();
+      } else {
+        return null;
+      }
+
+      return actualTypeArguments[indexOfActualTypeArgument];
+    }
+
+    Type searchedType = null;
+    if (superClass != null) {
+      searchedType = extractTypeForHierarchy(superClass, typeToEvaluate);
+    }
+    return searchedType;
+  }
+
+  private static Type[] extractRealTypes(
+      Type[] actualTypeArguments, Type parentType, Class<?> rawParentClass) {
+    Preconditions.checkNotNull(actualTypeArguments);
+
+    Type[] retTypes = new Type[actualTypeArguments.length];
+    for (int i = 0; i < actualTypeArguments.length; ++i) {
+      retTypes[i] = getActualType(actualTypeArguments[i], parentType, rawParentClass);
+    }
+    return retTypes;
+  }
+
+  private static int getIndex(TypeVariable<?>[] types, TypeVariable<?> type) {
+    for (int i = 0; i < types.length; ++i) {
+      if (type.equals(types[i])) {
+        return i;
+      }
+    }
+    throw new IllegalStateException(
+        "How can the type variable not be present in the class declaration!");
+  }
+}

src/com/bukkit/mcteam/gson/TypeInfoMap.java

@@ -0,0 +1,58 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+import java.lang.reflect.ParameterizedType;
+import java.lang.reflect.Type;
+import java.util.Map;
+import java.util.Properties;
+
+/**
+ * A convenience object for retrieving the map type information.
+ *
+ * @author Inderjeet Singh
+ * @author Joel Leitch
+ */
+final class TypeInfoMap {
+  private final Type keyType;
+  private final Type valueType;
+  
+  public TypeInfoMap(Type mapType) {
+    if (mapType instanceof Class<?> && Properties.class.isAssignableFrom((Class<?>) mapType)) {
+      keyType = String.class;
+      valueType = String.class;
+    } else if (mapType instanceof ParameterizedType) {
+      TypeInfo rawType = new TypeInfo(mapType);
+      Preconditions.checkArgument(Map.class.isAssignableFrom(rawType.getRawClass()));
+      ParameterizedType paramType = (ParameterizedType) mapType;
+      keyType = paramType.getActualTypeArguments()[0];
+      valueType = paramType.getActualTypeArguments()[1];      
+    } else {
+      throw new IllegalArgumentException(
+          "Map objects need to be parameterized unless you use a custom serializer. "
+              + "Use the com.bukkit.mcteam.gson.reflect.TypeToken to extract the ParameterizedType.");
+    }
+  }
+
+  public Type getKeyType() {
+    return keyType;
+  }
+
+  public Type getValueType() {
+    return valueType;
+  }
+}

src/com/bukkit/mcteam/gson/TypeUtils.java

@@ -0,0 +1,95 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+import java.lang.reflect.Array;
+import java.lang.reflect.GenericArrayType;
+import java.lang.reflect.ParameterizedType;
+import java.lang.reflect.Type;
+import java.lang.reflect.WildcardType;
+
+/**
+ * Utility class containing some methods for obtaining information on types.
+ *
+ * @author Inderjeet Singh
+ * @author Joel Leitch
+ */
+final class TypeUtils {
+
+  /**
+   * Returns the actual type matching up with the first type variable.
+   * So, for a {@code typeInfo} instance defined as:
+   * <pre>
+   *   class Foo<A, B> {
+   *   }
+   *   Type fooType = new TypeToken<Foo<Integer, String>>() {}.getType();
+   * </pre>
+   * <code>TypeUtils.getActualTypeForFirstTypeVariable(fooType)</code> will return Integer.class.
+   */
+  static Type getActualTypeForFirstTypeVariable(Type type) {
+    if (type instanceof Class<?>) {
+      return Object.class;
+    } else if (type instanceof ParameterizedType) {
+      return ((ParameterizedType)type).getActualTypeArguments()[0];
+    } else if (type instanceof GenericArrayType) {
+      return getActualTypeForFirstTypeVariable(((GenericArrayType)type).getGenericComponentType());
+    } else {
+      throw new IllegalArgumentException("Type \'" + type + "\' is not a Class, "
+          + "ParameterizedType, or GenericArrayType. Can't extract class.");
+    }
+  }
+
+  static boolean isArray(Type type) {
+    if (type instanceof Class<?>) {
+      return ((Class<?>)type).isArray();
+    } else if (type instanceof GenericArrayType) {
+      return true;
+    } else {
+      return false;
+    }
+  }
+
+  /**
+   * This method returns the actual raw class associated with the specified type.
+   */
+  static Class<?> toRawClass(Type type) {
+    if (type instanceof Class<?>) {
+      return (Class<?>) type;
+    } else if (type instanceof ParameterizedType) {
+      ParameterizedType actualType = (ParameterizedType)type;
+      return toRawClass(actualType.getRawType());
+    } else if (type instanceof GenericArrayType) {
+      GenericArrayType actualType = (GenericArrayType) type;
+      Class<?> rawClass = toRawClass(actualType.getGenericComponentType());
+      return wrapWithArray(rawClass);
+    } else if (type instanceof WildcardType) {
+      WildcardType castedType = (WildcardType) type;
+      return toRawClass(castedType.getUpperBounds()[0]);
+    } else {
+      throw new IllegalArgumentException("Type \'" + type + "\' is not a Class, "
+          + "ParameterizedType, or GenericArrayType. Can't extract class.");
+    }
+  }
+
+  static Class<?> wrapWithArray(Class<?> rawClass) {
+    return Array.newInstance(rawClass, 0).getClass();
+  }
+
+  private TypeUtils() {
+    // Class with just some static utility methods, should not be instantiated
+  }
+}

src/com/bukkit/mcteam/gson/UpperCamelCaseSeparatorNamingPolicy.java

@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+/**
+ * A {@link FieldNamingStrategy2} that ensures the JSON field names consist of mixed
+ * case letters starting with a capital and are separated by a particular
+ * {@code separatorString}.
+ *
+ *<p>The following is an example:</p>
+ * <pre>
+ * class StringWrapper {
+ *   public String AStringField = "abcd";
+ * }
+ *
+ * UpperCamelCaseSeparatorNamingPolicy policy = new UpperCamelCaseSeparatorNamingPolicy("_");
+ * String translatedFieldName =
+ *     policy.translateName(StringWrapper.class.getField("AStringField"));
+ *
+ * assert("A_String_Field".equals(translatedFieldName));
+ * </pre>
+ *
+ * @author Joel Leitch
+ */
+final class UpperCamelCaseSeparatorNamingPolicy extends CompositionFieldNamingPolicy {
+
+  public UpperCamelCaseSeparatorNamingPolicy(String separatorString) {
+    super(new CamelCaseSeparatorNamingPolicy(separatorString),
+        new ModifyFirstLetterNamingPolicy(ModifyFirstLetterNamingPolicy.LetterModifier.UPPER));
+  }
+}

src/com/bukkit/mcteam/gson/UpperCaseNamingPolicy.java

@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+import java.lang.annotation.Annotation;
+import java.lang.reflect.Type;
+import java.util.Collection;
+
+/**
+ * A {@link FieldNamingStrategy2} that ensures the JSON field names consist of only
+ * upper case letters.
+ *
+ * <p>The following is an example:</p>
+ * <pre>
+ * class IntWrapper {
+ *   public int integerField = 0;
+ * }
+ *
+ * UpperCaseNamingPolicy policy = new UpperCaseNamingPolicy();
+ * String translatedFieldName =
+ *     policy.translateName(IntWrapper.class.getField("integerField"));
+ *
+ * assert("INTEGERFIELD".equals(translatedFieldName));
+ * </pre>
+ *
+ * @author Joel Leitch
+ */
+final class UpperCaseNamingPolicy extends RecursiveFieldNamingPolicy {
+
+  @Override
+  protected String translateName(String target, Type fieldType, Collection<Annotation> annotations) {
+    return target.toUpperCase();
+  }
+}

src/com/bukkit/mcteam/gson/VersionConstants.java

@@ -0,0 +1,29 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+/**
+ * Class contain all constants for versioning support.
+ *
+ * @author Joel Leitch
+ */
+final class VersionConstants {
+  // Prevent instantiation
+  private VersionConstants() { }
+
+  static final double IGNORE_VERSIONS = -1D;
+}

src/com/bukkit/mcteam/gson/VersionExclusionStrategy.java

@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson;
+
+import com.bukkit.mcteam.gson.annotations.Since;
+import com.bukkit.mcteam.gson.annotations.Until;
+
+/**
+ * This strategy will exclude any files and/or class that are passed the
+ * {@link #version} value.
+ *
+ * @author Joel Leitch
+ */
+final class VersionExclusionStrategy implements ExclusionStrategy {
+  private final double version;
+
+  public VersionExclusionStrategy(double version) {
+    Preconditions.checkArgument(version >= 0.0D);
+    this.version = version;
+  }
+
+  public boolean shouldSkipField(FieldAttributes f) {
+    return !isValidVersion(f.getAnnotation(Since.class), f.getAnnotation(Until.class));
+  }
+
+  public boolean shouldSkipClass(Class<?> clazz) {
+    return !isValidVersion(clazz.getAnnotation(Since.class), clazz.getAnnotation(Until.class));
+  }
+
+  private boolean isValidVersion(Since since, Until until) {
+    return (isValidSince(since) && isValidUntil(until));
+  }
+
+  private boolean isValidSince(Since annotation) {
+    if (annotation != null) {
+      double annotationVersion = annotation.value();
+      if (annotationVersion > version) {
+        return false;
+      }
+    }
+    return true;
+  }
+
+  private boolean isValidUntil(Until annotation) {
+    if (annotation != null) {
+      double annotationVersion = annotation.value();
+      if (annotationVersion <= version) {
+        return false;
+      }
+    }
+    return true;
+  }
+}

src/com/bukkit/mcteam/gson/annotations/Expose.java

@@ -0,0 +1,79 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson.annotations;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * An annotation that indicates this member should be exposed for JSON
+ * serialization or deserialization.
+ *
+ * <p>This annotation has no effect unless you build {@link com.bukkit.mcteam.gson.Gson}
+ * with a {@link com.bukkit.mcteam.gson.GsonBuilder} and invoke
+ * {@link com.bukkit.mcteam.gson.GsonBuilder#excludeFieldsWithoutExposeAnnotation()}
+ * method.</p>
+ *
+ * <p>Here is an example of how this annotation is meant to be used:
+ * <p><pre>
+ * public class User {
+ *   &#64Expose private String firstName;
+ *   &#64Expose(serialize = false) private String lastName;
+ *   &#64Expose (serialize = false, deserialize = false) private String emailAddress;
+ *   private String password;
+ * }
+ * </pre></p>
+ * If you created Gson with {@code new Gson()}, the {@code toJson()} and {@code fromJson()}
+ * methods will use the {@code password} field along-with {@code firstName}, {@code lastName},
+ * and {@code emailAddress} for serialization and deserialization. However, if you created Gson
+ * with {@code Gson gson = new GsonBuilder().excludeFieldsWithoutExposeAnnotation().create()}
+ * then the {@code toJson()} and {@code fromJson()} methods of Gson will exclude the
+ * {@code password} field. This is because the {@code password} field is not marked with the
+ * {@code @Expose} annotation. Gson will also exclude {@code lastName} and {@code emailAddress}
+ * from serialization since {@code serialize} is set to {@code false}. Similarly, Gson will
+ * exclude {@code emailAddress} from deserialization since {@code deserialize} is set to false.
+ *
+ * <p>Note that another way to achieve the same effect would have been to just mark the
+ * {@code password} field as {@code transient}, and Gson would have excluded it even with default
+ * settings. The {@code @Expose} annotation is useful in a style of programming where you want to
+ * explicitly specify all fields that should get considered for serialization or deserialization.
+ *
+ * @author Inderjeet Singh
+ * @author Joel Leitch
+ */
+@Retention(RetentionPolicy.RUNTIME)
+@Target(ElementType.FIELD)
+public @interface Expose {
+  
+  /**
+   * If {@code true}, the field marked with this annotation is written out in the JSON while
+   * serializing. If {@code false}, the field marked with this annotation is skipped from the
+   * serialized output. Defaults to {@code true}.
+   * @since 1.4
+   */
+  public boolean serialize() default true;
+
+  /**
+   * If {@code true}, the field marked with this annotation is deserialized from the JSON.
+   * If {@code false}, the field marked with this annotation is skipped during deserialization. 
+   * Defaults to {@code true}.
+   * @since 1.4
+   */
+  public boolean deserialize() default true;
+}

src/com/bukkit/mcteam/gson/annotations/SerializedName.java

@@ -0,0 +1,74 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson.annotations;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * An annotation that indicates this member should be serialized to JSON with
+ * the provided name value as its field name.
+ *
+ * <p>This annotation will override any {@link com.bukkit.mcteam.gson.FieldNamingPolicy}, including
+ * the default field naming policy, that may have been set on the {@link com.bukkit.mcteam.gson.Gson}
+ * instance.  A different naming policy can set using the {@code GsonBuilder} class.  See
+ * {@link com.bukkit.mcteam.gson.GsonBuilder#setFieldNamingPolicy(com.bukkit.mcteam.gson.FieldNamingPolicy)}
+ * for more information.</p>
+ *
+ * <p>Here is an example of how this annotation is meant to be used:</p>
+ * <pre>
+ * public class SomeClassWithFields {
+ *   &#64SerializedName("name") private final String someField;
+ *   private final String someOtherField;
+ *
+ *   public SomeClassWithFields(String a, String b) {
+ *     this.someField = a;
+ *     this.someOtherField = b;
+ *   }
+ * }
+ * </pre>
+ *
+ * <p>The following shows the output that is generated when serializing an instance of the
+ * above example class:</p>
+ * <pre>
+ * SomeClassWithFields objectToSerialize = new SomeClassWithFields("a", "b");
+ * Gson gson = new Gson();
+ * String jsonRepresentation = gson.toJson(objectToSerialize);
+ * System.out.println(jsonRepresentation);
+ *
+ * ===== OUTPUT =====
+ * {"name":"a","someOtherField":"b"}
+ * </pre>
+ *
+ * <p>NOTE: The value you specify in this annotation must be a valid JSON field name.</p>
+ *
+ * @see com.bukkit.mcteam.gson.FieldNamingPolicy
+ *
+ * @author Inderjeet Singh
+ * @author Joel Leitch
+ */
+@Retention(RetentionPolicy.RUNTIME)
+@Target(ElementType.FIELD)
+public @interface SerializedName {
+
+  /**
+   * @return the desired name of the field when it is serialized
+   */
+  String value();
+}

src/com/bukkit/mcteam/gson/annotations/Since.java

@@ -0,0 +1,61 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson.annotations;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * An annotation that indicates the version number since a member or a type has been present.
+ * This annotation is useful to manage versioning of your Json classes for a web-service.
+ *
+ * <p>
+ * This annotation has no effect unless you build {@link com.bukkit.mcteam.gson.Gson} with a
+ * {@link com.bukkit.mcteam.gson.GsonBuilder} and invoke
+ * {@link com.bukkit.mcteam.gson.GsonBuilder#setVersion(double)} method.
+ *
+ * <p>Here is an example of how this annotation is meant to be used:</p>
+ * <pre>
+ * public class User {
+ *   private String firstName;
+ *   private String lastName;
+ *   &#64Since(1.0) private String emailAddress;
+ *   &#64Since(1.0) private String password;
+ *   &#64Since(1.1) private Address address;
+ * }
+ * </pre>
+ *
+ * <p>If you created Gson with {@code new Gson()}, the {@code toJson()} and {@code fromJson()}
+ * methods will use all the fields for serialization and deserialization. However, if you created
+ * Gson with {@code Gson gson = new GsonBuilder().setVersion(1.0).create()} then the
+ * {@code toJson()} and {@code fromJson()} methods of Gson will exclude the {@code address} field
+ * since it's version number is set to {@code 1.1}.</p>
+ *
+ * @author Inderjeet Singh
+ * @author Joel Leitch
+ */
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ElementType.FIELD, ElementType.TYPE})
+public @interface Since {
+  /**
+   * the value indicating a version number since this member
+   * or type has been present.
+   */
+  double value();
+}

src/com/bukkit/mcteam/gson/annotations/Until.java

@@ -0,0 +1,66 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson.annotations;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * An annotation that indicates the version number until a member or a type should be present.
+ * Basically, if Gson is created with a version number that exceeds the value stored in the
+ * {@code Until} annotation then the field will be ignored from the JSON output.  This annotation
+ * is useful to manage versioning of your JSON classes for a web-service.
+ *
+ * <p>
+ * This annotation has no effect unless you build {@link com.bukkit.mcteam.gson.Gson} with a
+ * {@link com.bukkit.mcteam.gson.GsonBuilder} and invoke
+ * {@link com.bukkit.mcteam.gson.GsonBuilder#setVersion(double)} method.
+ *
+ * <p>Here is an example of how this annotation is meant to be used:</p>
+ * <pre>
+ * public class User {
+ *   private String firstName;
+ *   private String lastName;
+ *   &#64Until(1.1) private String emailAddress;
+ *   &#64Until(1.1) private String password;
+ * }
+ * </pre>
+ *
+ * <p>If you created Gson with {@code new Gson()}, the {@code toJson()} and {@code fromJson()}
+ * methods will use all the fields for serialization and deserialization. However, if you created
+ * Gson with {@code Gson gson = new GsonBuilder().setVersion(1.2).create()} then the
+ * {@code toJson()} and {@code fromJson()} methods of Gson will exclude the {@code emailAddress}
+ * and {@code password} fields from the example above, because the version number passed to the 
+ * GsonBuilder, {@code 1.2}, exceeds the version number set on the {@code Until} annotation,
+ * {@code 1.1}, for those fields.
+ *
+ * @author Inderjeet Singh
+ * @author Joel Leitch
+ * @since 1.3
+ */
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ElementType.FIELD, ElementType.TYPE})
+public @interface Until {
+
+  /**
+   * the value indicating a version number until this member
+   * or type should be ignored.
+   */
+  double value();
+}

src/com/bukkit/mcteam/gson/annotations/package-info.java

@@ -0,0 +1,6 @@
+/**
+ * This package provides annotations that can be used with {@link com.bukkit.mcteam.gson.Gson}.
+ * 
+ * @author Inderjeet Singh, Joel Leitch
+ */
+package com.bukkit.mcteam.gson.annotations;

src/com/bukkit/mcteam/gson/package-info.java

@@ -0,0 +1,11 @@
+/**
+ * This package provides the {@link com.bukkit.mcteam.gson.Gson} class to convert Json to Java and
+ * vice-versa.
+ *
+ * <p>The primary class to use is {@link com.bukkit.mcteam.gson.Gson} which can be constructed with
+ * {@code new Gson()} (using default settings) or by using {@link com.bukkit.mcteam.gson.GsonBuilder}
+ * (to configure various options such as using versioning and so on).</p>
+ *
+ * @author Inderjeet Singh, Joel Leitch
+ */
+package com.bukkit.mcteam.gson;

src/com/bukkit/mcteam/gson/reflect/TypeToken.java

@@ -0,0 +1,375 @@
+/*
+ * Copyright (C) 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson.reflect;
+
+import java.lang.reflect.Array;
+import java.lang.reflect.GenericArrayType;
+import java.lang.reflect.ParameterizedType;
+import java.lang.reflect.Type;
+import java.lang.reflect.TypeVariable;
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * Represents a generic type {@code T}.
+ *
+ * You can use this class to get the generic type for a class. For example,
+ * to get the generic type for <code>Collection&lt;Foo&gt;</code>, you can use:
+ * <p>
+ * <code>Type typeOfCollectionOfFoo = new TypeToken&lt;Collection&lt;Foo&gt;&gt;(){}.getType()
+ * </code>
+ * 
+ * <p>Assumes {@code Type} implements {@code equals()} and {@code hashCode()}
+ * as a value (as opposed to identity) comparison.
+ *
+ * Also implements {@link #isAssignableFrom(Type)} to check type-safe
+ * assignability.
+ *
+ * @author Bob Lee
+ * @author Sven Mawson
+ */
+public abstract class TypeToken<T> {
+
+  final Class<? super T> rawType;
+  final Type type;
+
+  /**
+   * Constructs a new type token. Derives represented class from type
+   * parameter.
+   *
+   * <p>Clients create an empty anonymous subclass. Doing so embeds the type
+   * parameter in the anonymous class's type hierarchy so we can reconstitute
+   * it at runtime despite erasure.
+   *
+   * <p>For example:
+   * <code>
+   * {@literal TypeToken<List<String>> t = new TypeToken<List<String>>}(){}
+   * </code>
+   */
+  @SuppressWarnings("unchecked")
+  protected TypeToken() {
+    this.type = getSuperclassTypeParameter(getClass());
+    this.rawType = (Class<? super T>) getRawType(type);
+  }
+
+  /**
+   * Unsafe. Constructs a type token manually.
+   */
+  @SuppressWarnings({"unchecked"})
+  private TypeToken(Type type) {
+    this.rawType = (Class<? super T>) getRawType(nonNull(type, "type"));
+    this.type = type;
+  }
+
+  private static <T> T nonNull(T o, String message) {
+    if (o == null) {
+      throw new NullPointerException(message);
+    }
+    return o;
+  }
+  
+  /**
+   * Gets type from super class's type parameter.
+   */
+  static Type getSuperclassTypeParameter(Class<?> subclass) {
+    Type superclass = subclass.getGenericSuperclass();
+    if (superclass instanceof Class<?>) {
+      throw new RuntimeException("Missing type parameter.");
+    }
+    return ((ParameterizedType) superclass).getActualTypeArguments()[0];
+  }
+
+  /**
+   * Gets type token from super class's type parameter.
+   */
+  static TypeToken<?> fromSuperclassTypeParameter(Class<?> subclass) {
+    return new SimpleTypeToken<Object>(subclass);
+  }
+
+  private static Class<?> getRawType(Type type) {
+    if (type instanceof Class<?>) {
+      // type is a normal class.
+      return (Class<?>) type;
+    } else if (type instanceof ParameterizedType) {
+      ParameterizedType parameterizedType = (ParameterizedType) type;
+
+      // I'm not exactly sure why getRawType() returns Type instead of Class.
+      // Neal isn't either but suspects some pathological case related
+      // to nested classes exists.
+      Type rawType = parameterizedType.getRawType();
+      if (rawType instanceof Class<?>) {
+        return (Class<?>) rawType;
+      }
+      throw buildUnexpectedTypeError(rawType, Class.class);
+    } else if (type instanceof GenericArrayType) {
+      GenericArrayType genericArrayType = (GenericArrayType) type;
+
+      // TODO(jleitch): This is not the most efficient way to handle generic
+      // arrays, but is there another way to extract the array class in a
+      // non-hacky way (i.e. using String value class names- "[L...")?
+      Object rawArrayType = Array.newInstance(
+          getRawType(genericArrayType.getGenericComponentType()), 0);
+      return rawArrayType.getClass();
+    } else {
+      throw buildUnexpectedTypeError(
+          type, ParameterizedType.class, GenericArrayType.class);
+    }
+  }
+
+  /**
+   * Gets the raw type.
+   */
+  public Class<? super T> getRawType() {
+    return rawType;
+  }
+
+  /**
+   * Gets underlying {@code Type} instance.
+   */
+  public Type getType() {
+    return type;
+  }
+
+  /**
+   * Check if this type is assignable from the given class object.
+   */
+  public boolean isAssignableFrom(Class<?> cls) {
+    return isAssignableFrom((Type) cls);
+  }
+
+  /**
+   * Check if this type is assignable from the given Type.
+   */
+  public boolean isAssignableFrom(Type from) {
+    if (from == null) {
+      return false;
+    }
+
+    if (type.equals(from)) {
+      return true;
+    }
+
+    if (type instanceof Class<?>) {
+      return rawType.isAssignableFrom(getRawType(from));
+    } else if (type instanceof ParameterizedType) {
+      return isAssignableFrom(from, (ParameterizedType) type,
+          new HashMap<String, Type>());
+    } else if (type instanceof GenericArrayType) {
+      return rawType.isAssignableFrom(getRawType(from))
+          && isAssignableFrom(from, (GenericArrayType) type);
+    } else {
+      throw buildUnexpectedTypeError(
+          type, Class.class, ParameterizedType.class, GenericArrayType.class);
+    }
+  }
+
+  /**
+   * Check if this type is assignable from the given type token.
+   */
+  public boolean isAssignableFrom(TypeToken<?> token) {
+    return isAssignableFrom(token.getType());
+  }
+
+  /**
+   * Private helper function that performs some assignability checks for
+   * the provided GenericArrayType.
+   */
+  private static boolean isAssignableFrom(Type from, GenericArrayType to) {
+    Type toGenericComponentType = to.getGenericComponentType();
+    if (toGenericComponentType instanceof ParameterizedType) {
+      Type t = from;
+      if (from instanceof GenericArrayType) {
+        t = ((GenericArrayType) from).getGenericComponentType();
+      } else if (from instanceof Class<?>) {
+        Class<?> classType = (Class<?>) from;
+        while (classType.isArray()) {
+          classType = classType.getComponentType();
+        }
+        t = classType;
+      }
+      return isAssignableFrom(t, (ParameterizedType) toGenericComponentType,
+          new HashMap<String, Type>());
+    }
+    // No generic defined on "to"; therefore, return true and let other
+    // checks determine assignability
+    return true;
+  }
+
+  /**
+   * Private recursive helper function to actually do the type-safe checking
+   * of assignability.
+   */
+  private static boolean isAssignableFrom(Type from, ParameterizedType to,
+      Map<String, Type> typeVarMap) {
+
+    if (from == null) {
+      return false;
+    }
+
+    if (to.equals(from)) {
+      return true;
+    }
+
+    // First figure out the class and any type information.
+    Class<?> clazz = getRawType(from);
+    ParameterizedType ptype = null;
+    if (from instanceof ParameterizedType) {
+      ptype = (ParameterizedType) from;
+    }
+
+    // Load up parameterized variable info if it was parameterized.
+    if (ptype != null) {
+      Type[] tArgs = ptype.getActualTypeArguments();
+      TypeVariable<?>[] tParams = clazz.getTypeParameters();
+      for (int i = 0; i < tArgs.length; i++) {
+        Type arg = tArgs[i];
+        TypeVariable<?> var = tParams[i];
+        while (arg instanceof TypeVariable<?>) {
+          TypeVariable<?> v = (TypeVariable<?>) arg;
+          arg = typeVarMap.get(v.getName());
+        }
+        typeVarMap.put(var.getName(), arg);
+      }
+
+      // check if they are equivalent under our current mapping.
+      if (typeEquals(ptype, to, typeVarMap)) {
+        return true;
+      }
+    }
+
+    for (Type itype : clazz.getGenericInterfaces()) {
+      if (isAssignableFrom(itype, to, new HashMap<String, Type>(typeVarMap))) {
+        return true;
+      }
+    }
+
+    // Interfaces didn't work, try the superclass.
+    Type sType = clazz.getGenericSuperclass();
+    if (isAssignableFrom(sType, to, new HashMap<String, Type>(typeVarMap))) {
+      return true;
+    }
+
+    return false;
+  }
+
+  /**
+   * Checks if two parameterized types are exactly equal, under the variable
+   * replacement described in the typeVarMap.
+   */
+  private static boolean typeEquals(ParameterizedType from,
+      ParameterizedType to, Map<String, Type> typeVarMap) {
+    if (from.getRawType().equals(to.getRawType())) {
+      Type[] fromArgs = from.getActualTypeArguments();
+      Type[] toArgs = to.getActualTypeArguments();
+      for (int i = 0; i < fromArgs.length; i++) {
+        if (!matches(fromArgs[i], toArgs[i], typeVarMap)) {
+          return false;
+        }
+      }
+      return true;
+    }
+    return false;
+  }
+
+  /**
+   * Checks if two types are the same or are equivalent under a variable mapping
+   * given in the type map that was provided.
+   */
+  private static boolean matches(Type from, Type to,
+      Map<String, Type> typeMap) {
+    if (to.equals(from)) return true;
+
+    if (from instanceof TypeVariable<?>) {
+      return to.equals(typeMap.get(((TypeVariable<?>)from).getName()));
+    }
+
+    return false;
+  }
+
+  /**
+   * Hashcode for this object.
+   * @return hashcode for this object.
+   */
+  @Override public int hashCode() {
+    return type.hashCode();
+  }
+
+  /**
+   * Method to test equality. 
+   * 
+   * @return true if this object is logically equal to the specified object, false otherwise.
+   */
+  @Override public boolean equals(Object o) {
+    if (o == this) {
+      return true;
+    }
+    if (!(o instanceof TypeToken<?>)) {
+      return false;
+    }
+    TypeToken<?> t = (TypeToken<?>) o;
+    return type.equals(t.type);
+  }
+
+  /**
+   * Returns a string representation of this object.
+   * @return a string representation of this object.
+   */
+  @Override public String toString() {
+    return type instanceof Class<?>
+        ? ((Class<?>) type).getName()
+        : type.toString();
+  }
+
+  private static AssertionError buildUnexpectedTypeError(
+      Type token, Class<?>... expected) {
+
+    // Build exception message
+    StringBuilder exceptionMessage =
+        new StringBuilder("Unexpected type. Expected one of: ");
+    for (Class<?> clazz : expected) {
+      exceptionMessage.append(clazz.getName()).append(", ");
+    }
+    exceptionMessage.append("but got: ").append(token.getClass().getName())
+        .append(", for type token: ").append(token.toString()).append('.');
+
+    return new AssertionError(exceptionMessage.toString());
+  }
+
+  /**
+   * Gets type token for the given {@code Type} instance.
+   */
+  public static TypeToken<?> get(Type type) {
+    return new SimpleTypeToken<Object>(type);
+  }
+
+  /**
+   * Gets type token for the given {@code Class} instance.
+   */
+  public static <T> TypeToken<T> get(Class<T> type) {
+    return new SimpleTypeToken<T>(type);
+  }
+
+  /**
+   * Private static class to not create more anonymous classes than
+   * necessary.
+   */
+  private static class SimpleTypeToken<T> extends TypeToken<T> {
+    public SimpleTypeToken(Type type) {
+      super(type);
+    }
+  }
+}

src/com/bukkit/mcteam/gson/reflect/package-info.java

@@ -0,0 +1,6 @@
+/**
+ * This package provides utility classes for finding type information for generic types.
+ *  
+ * @author Inderjeet Singh, Joel Leitch
+ */
+package com.bukkit.mcteam.gson.reflect;

src/com/bukkit/mcteam/gson/stream/JsonScope.java

@@ -0,0 +1,71 @@
+/*
+ * Copyright (C) 2010 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson.stream;
+
+/**
+ * Lexical scoping elements within a JSON reader or writer.
+ *
+ * @author Jesse Wilson
+ * @since 1.6
+ */
+enum JsonScope {
+
+    /**
+     * An array with no elements requires no separators or newlines before
+     * it is closed.
+     */
+    EMPTY_ARRAY,
+
+    /**
+     * A array with at least one value requires a comma and newline before
+     * the next element.
+     */
+    NONEMPTY_ARRAY,
+
+    /**
+     * An object with no name/value pairs requires no separators or newlines
+     * before it is closed.
+     */
+    EMPTY_OBJECT,
+
+    /**
+     * An object whose most recent element is a key. The next element must
+     * be a value.
+     */
+    DANGLING_NAME,
+
+    /**
+     * An object with at least one name/value pair requires a comma and
+     * newline before the next element.
+     */
+    NONEMPTY_OBJECT,
+
+    /**
+     * No object or array has been started.
+     */
+    EMPTY_DOCUMENT,
+
+    /**
+     * A document with at an array or object.
+     */
+    NONEMPTY_DOCUMENT,
+
+    /**
+     * A document that's been closed and cannot be accessed.
+     */
+    CLOSED,
+}

src/com/bukkit/mcteam/gson/stream/JsonToken.java

@@ -0,0 +1,85 @@
+/*
+ * Copyright (C) 2010 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson.stream;
+
+/**
+ * A structure, name or value type in a JSON-encoded string.
+ *
+ * @author Jesse Wilson
+ * @since 1.6
+ */
+public enum JsonToken {
+
+  /**
+   * The opening of a JSON array. Written using {@link JsonWriter#beginObject}
+   * and read using {@link JsonReader#beginObject}.
+   */
+  BEGIN_ARRAY,
+
+  /**
+   * The closing of a JSON array. Written using {@link JsonWriter#endArray}
+   * and read using {@link JsonReader#endArray}.
+   */
+  END_ARRAY,
+
+  /**
+   * The opening of a JSON object. Written using {@link JsonWriter#beginObject}
+   * and read using {@link JsonReader#beginObject}.
+   */
+  BEGIN_OBJECT,
+
+  /**
+   * The closing of a JSON object. Written using {@link JsonWriter#endObject}
+   * and read using {@link JsonReader#endObject}.
+   */
+  END_OBJECT,
+
+  /**
+   * A JSON property name. Within objects, tokens alternate between names and
+   * their values. Written using {@link JsonWriter#name} and read using {@link
+   * JsonReader#nextName}
+   */
+  NAME,
+
+  /**
+   * A JSON string.
+   */
+  STRING,
+
+  /**
+   * A JSON number represented in this API by a Java {@code double}, {@code
+   * long}, or {@code int}.
+   */
+  NUMBER,
+
+  /**
+   * A JSON {@code true} or {@code false}.
+   */
+  BOOLEAN,
+
+  /**
+   * A JSON {@code null}.
+   */
+  NULL,
+
+  /**
+   * The end of the JSON stream. This sentinel value is returned by {@link
+   * JsonReader#peek()} to signal that the JSON-encoded value has no more
+   * tokens.
+   */
+  END_DOCUMENT
+}

src/com/bukkit/mcteam/gson/stream/JsonWriter.java

@@ -0,0 +1,553 @@
+/*
+ * Copyright (C) 2010 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson.stream;
+
+import java.io.Closeable;
+import java.io.IOException;
+import java.io.Writer;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Writes a JSON (<a href="http://www.ietf.org/rfc/rfc4627.txt">RFC 4627</a>)
+ * encoded value to a stream, one token at a time. The stream includes both
+ * literal values (strings, numbers, booleans and nulls) as well as the begin
+ * and end delimiters of objects and arrays.
+ *
+ * <h3>Encoding JSON</h3>
+ * To encode your data as JSON, create a new {@code JsonWriter}. Each JSON
+ * document must contain one top-level array or object. Call methods on the
+ * writer as you walk the structure's contents, nesting arrays and objects as
+ * necessary:
+ * <ul>
+ *   <li>To write <strong>arrays</strong>, first call {@link #beginArray()}.
+ *       Write each of the array's elements with the appropriate {@link #value}
+ *       methods or by nesting other arrays and objects. Finally close the array
+ *       using {@link #endArray()}.
+ *   <li>To write <strong>objects</strong>, first call {@link #beginObject()}.
+ *       Write each of the object's properties by alternating calls to
+ *       {@link #name} with the property's value. Write property values with the
+ *       appropriate {@link #value} method or by nesting other objects or arrays.
+ *       Finally close the object using {@link #endObject()}.
+ * </ul>
+ *
+ * <h3>Example</h3>
+ * Suppose we'd like to encode a stream of messages such as the following: <pre> {@code
+ * [
+ *   {
+ *     "id": 912345678901,
+ *     "text": "How do I stream JSON in Java?",
+ *     "geo": null,
+ *     "user": {
+ *       "name": "json_newb",
+ *       "followers_count": 41
+ *      }
+ *   },
+ *   {
+ *     "id": 912345678902,
+ *     "text": "@json_newb just use JsonWriter!",
+ *     "geo": [50.454722, -104.606667],
+ *     "user": {
+ *       "name": "jesse",
+ *       "followers_count": 2
+ *     }
+ *   }
+ * ]}</pre>
+ * This code encodes the above structure: <pre>   {@code
+ *   public void writeJsonStream(OutputStream out, List<Message> messages) throws IOException {
+ *     JsonWriter writer = new JsonWriter(new OutputStreamWriter(out, "UTF-8"));
+ *     writer.setIndentSpaces(4);
+ *     writeMessagesArray(writer, messages);
+ *     writer.close();
+ *   }
+ *
+ *   public void writeMessagesArray(JsonWriter writer, List<Message> messages) throws IOException {
+ *     writer.beginArray();
+ *     for (Message message : messages) {
+ *       writeMessage(writer, message);
+ *     }
+ *     writer.endArray();
+ *   }
+ *
+ *   public void writeMessage(JsonWriter writer, Message message) throws IOException {
+ *     writer.beginObject();
+ *     writer.name("id").value(message.getId());
+ *     writer.name("text").value(message.getText());
+ *     if (message.getGeo() != null) {
+ *       writer.name("geo");
+ *       writeDoublesArray(writer, message.getGeo());
+ *     } else {
+ *       writer.name("geo").nullValue();
+ *     }
+ *     writer.name("user");
+ *     writeUser(writer, message.getUser());
+ *     writer.endObject();
+ *   }
+ *
+ *   public void writeUser(JsonWriter writer, User user) throws IOException {
+ *     writer.beginObject();
+ *     writer.name("name").value(user.getName());
+ *     writer.name("followers_count").value(user.getFollowersCount());
+ *     writer.endObject();
+ *   }
+ *
+ *   public void writeDoublesArray(JsonWriter writer, List<Double> doubles) throws IOException {
+ *     writer.beginArray();
+ *     for (Double value : doubles) {
+ *       writer.value(value);
+ *     }
+ *     writer.endArray();
+ *   }}</pre>
+ *
+ * <p>Each {@code JsonWriter} may be used to write a single JSON stream.
+ * Instances of this class are not thread safe. Calls that would result in a
+ * malformed JSON string will fail with an {@link IllegalStateException}.
+ *
+ * @author Jesse Wilson
+ * @since 1.6
+ */
+public final class JsonWriter implements Closeable {
+
+  /** The output data, containing at most one top-level array or object. */
+  private final Writer out;
+
+  private final List<JsonScope> stack = new ArrayList<JsonScope>();
+  {
+    stack.add(JsonScope.EMPTY_DOCUMENT);
+  }
+
+  /**
+   * A string containing a full set of spaces for a single level of
+   * indentation, or null for no pretty printing.
+   */
+  private String indent;
+
+  /**
+   * The name/value separator; either ":" or ": ".
+   */
+  private String separator = ":";
+
+  private boolean lenient;
+
+  private boolean htmlSafe;
+
+  /**
+   * Creates a new instance that writes a JSON-encoded stream to {@code out}.
+   * For best performance, ensure {@link Writer} is buffered; wrapping in
+   * {@link java.io.BufferedWriter BufferedWriter} if necessary.
+   */
+  public JsonWriter(Writer out) {
+    if (out == null) {
+      throw new NullPointerException("out == null");
+    }
+    this.out = out;
+  }
+
+  /**
+   * Sets the indentation string to be repeated for each level of indentation
+   * in the encoded document. If {@code indent.isEmpty()} the encoded document
+   * will be compact. Otherwise the encoded document will be more
+   * human-readable.
+   *
+   * @param indent a string containing only whitespace.
+   */
+  public void setIndent(String indent) {
+    if (indent.length() == 0) {
+      this.indent = null;
+      this.separator = ":";
+    } else {
+      this.indent = indent;
+      this.separator = ": ";
+    }
+  }
+
+  /**
+   * Configure this writer to relax its syntax rules. By default, this writer
+   * only emits well-formed JSON as specified by <a
+   * href="http://www.ietf.org/rfc/rfc4627.txt">RFC 4627</a>. Setting the writer
+   * to lenient permits the following:
+   * <ul>
+   *   <li>Top-level values of any type. With strict writing, the top-level
+   *       value must be an object or an array.
+   *   <li>Numbers may be {@link Double#isNaN() NaNs} or {@link
+   *       Double#isInfinite() infinities}.
+   * </ul>
+   */
+  public void setLenient(boolean lenient) {
+    this.lenient = lenient;
+  }
+
+  /**
+   * Returns true if this writer has relaxed syntax rules.
+   */
+  public boolean isLenient() {
+    return lenient;
+  }
+
+  /**
+   * Configure this writer to emit JSON that's safe for direct inclusion in HTML
+   * and XML documents. This escapes the HTML characters {@code <}, {@code >},
+   * {@code &} and {@code =} before writing them to the stream. Without this
+   * setting, your XML/HTML encoder should replace these characters with the
+   * corresponding escape sequences.
+   */
+  public void setHtmlSafe(boolean htmlSafe) {
+    this.htmlSafe = htmlSafe;
+  }
+
+  /**
+   * Returns true if this writer writes JSON that's safe for inclusion in HTML
+   * and XML documents.
+   */
+  public boolean isHtmlSafe() {
+    return htmlSafe;
+  }
+
+  /**
+   * Begins encoding a new array. Each call to this method must be paired with
+   * a call to {@link #endArray}.
+   *
+   * @return this writer.
+   */
+  public JsonWriter beginArray() throws IOException {
+    return open(JsonScope.EMPTY_ARRAY, "[");
+  }
+
+  /**
+   * Ends encoding the current array.
+   *
+   * @return this writer.
+   */
+  public JsonWriter endArray() throws IOException {
+    return close(JsonScope.EMPTY_ARRAY, JsonScope.NONEMPTY_ARRAY, "]");
+  }
+
+  /**
+   * Begins encoding a new object. Each call to this method must be paired
+   * with a call to {@link #endObject}.
+   *
+   * @return this writer.
+   */
+  public JsonWriter beginObject() throws IOException {
+    return open(JsonScope.EMPTY_OBJECT, "{");
+  }
+
+  /**
+   * Ends encoding the current object.
+   *
+   * @return this writer.
+   */
+  public JsonWriter endObject() throws IOException {
+    return close(JsonScope.EMPTY_OBJECT, JsonScope.NONEMPTY_OBJECT, "}");
+  }
+
+  /**
+   * Enters a new scope by appending any necessary whitespace and the given
+   * bracket.
+   */
+  private JsonWriter open(JsonScope empty, String openBracket) throws IOException {
+    beforeValue(true);
+    stack.add(empty);
+    out.write(openBracket);
+    return this;
+  }
+
+  /**
+   * Closes the current scope by appending any necessary whitespace and the
+   * given bracket.
+   */
+  private JsonWriter close(JsonScope empty, JsonScope nonempty, String closeBracket)
+      throws IOException {
+    JsonScope context = peek();
+    if (context != nonempty && context != empty) {
+      throw new IllegalStateException("Nesting problem: " + stack);
+    }
+
+    stack.remove(stack.size() - 1);
+    if (context == nonempty) {
+      newline();
+    }
+    out.write(closeBracket);
+    return this;
+  }
+
+  /**
+   * Returns the value on the top of the stack.
+   */
+  private JsonScope peek() {
+    return stack.get(stack.size() - 1);
+  }
+
+  /**
+   * Replace the value on the top of the stack with the given value.
+   */
+  private void replaceTop(JsonScope topOfStack) {
+    stack.set(stack.size() - 1, topOfStack);
+  }
+
+  /**
+   * Encodes the property name.
+   *
+   * @param name the name of the forthcoming value. May not be null.
+   * @return this writer.
+   */
+  public JsonWriter name(String name) throws IOException {
+    if (name == null) {
+      throw new NullPointerException("name == null");
+    }
+    beforeName();
+    string(name);
+    return this;
+  }
+
+  /**
+   * Encodes {@code value}.
+   *
+   * @param value the literal string value, or null to encode a null literal.
+   * @return this writer.
+   */
+  public JsonWriter value(String value) throws IOException {
+    if (value == null) {
+      return nullValue();
+    }
+    beforeValue(false);
+    string(value);
+    return this;
+  }
+
+  /**
+   * Encodes {@code null}.
+   *
+   * @return this writer.
+   */
+  public JsonWriter nullValue() throws IOException {
+    beforeValue(false);
+    out.write("null");
+    return this;
+  }
+
+  /**
+   * Encodes {@code value}.
+   *
+   * @return this writer.
+   */
+  public JsonWriter value(boolean value) throws IOException {
+    beforeValue(false);
+    out.write(value ? "true" : "false");
+    return this;
+  }
+
+  /**
+   * Encodes {@code value}.
+   *
+   * @param value a finite value. May not be {@link Double#isNaN() NaNs} or
+   *     {@link Double#isInfinite() infinities}.
+   * @return this writer.
+   */
+  public JsonWriter value(double value) throws IOException {
+    if (Double.isNaN(value) || Double.isInfinite(value)) {
+      throw new IllegalArgumentException("Numeric values must be finite, but was " + value);
+    }
+    beforeValue(false);
+    out.append(Double.toString(value));
+    return this;
+  }
+
+  /**
+   * Encodes {@code value}.
+   *
+   * @return this writer.
+   */
+  public JsonWriter value(long value) throws IOException {
+    beforeValue(false);
+    out.write(Long.toString(value));
+    return this;
+  }
+
+  /**
+   * Encodes {@code value}.
+   *
+   * @param value a finite value. May not be {@link Double#isNaN() NaNs} or
+   *     {@link Double#isInfinite() infinities}.
+   * @return this writer.
+   */
+  public JsonWriter value(Number value) throws IOException {
+    if (value == null) {
+      return nullValue();
+    }
+
+    String string = value.toString();
+    if (!lenient
+        && (string.equals("-Infinity") || string.equals("Infinity") || string.equals("NaN"))) {
+      throw new IllegalArgumentException("Numeric values must be finite, but was " + value);
+    }
+    beforeValue(false);
+    out.append(string);
+    return this;
+  }
+
+  /**
+   * Ensures all buffered data is written to the underlying {@link Writer}
+   * and flushes that writer.
+   */
+  public void flush() throws IOException {
+    out.flush();
+  }
+
+  /**
+   * Flushes and closes this writer and the underlying {@link Writer}.
+   *
+   * @throws IOException if the JSON document is incomplete.
+   */
+  public void close() throws IOException {
+    out.close();
+
+    if (peek() != JsonScope.NONEMPTY_DOCUMENT) {
+      throw new IOException("Incomplete document");
+    }
+  }
+
+  private void string(String value) throws IOException {
+    out.write("\"");
+    for (int i = 0, length = value.length(); i < length; i++) {
+      char c = value.charAt(i);
+
+      /*
+       * From RFC 4627, "All Unicode characters may be placed within the
+       * quotation marks except for the characters that must be escaped:
+       * quotation mark, reverse solidus, and the control characters
+       * (U+0000 through U+001F)."
+       */
+      switch (c) {
+      case '"':
+      case '\\':
+        out.write('\\');
+        out.write(c);
+        break;
+
+      case '\t':
+        out.write("\\t");
+        break;
+
+      case '\b':
+        out.write("\\b");
+        break;
+
+      case '\n':
+        out.write("\\n");
+        break;
+
+      case '\r':
+        out.write("\\r");
+        break;
+
+      case '\f':
+        out.write("\\f");
+        break;
+
+      case '<':
+      case '>':
+      case '&':
+      case '=':
+      case '\'':
+        if (htmlSafe) {
+          out.write(String.format("\\u%04x", (int) c));
+        } else {
+          out.write(c);
+        }
+        break;
+
+      default:
+        if (c <= 0x1F) {
+          out.write(String.format("\\u%04x", (int) c));
+        } else {
+          out.write(c);
+        }
+        break;
+      }
+    }
+    out.write("\"");
+  }
+
+  private void newline() throws IOException {
+    if (indent == null) {
+      return;
+    }
+
+    out.write("\n");
+    for (int i = 1; i < stack.size(); i++) {
+      out.write(indent);
+    }
+  }
+
+  /**
+   * Inserts any necessary separators and whitespace before a name. Also
+   * adjusts the stack to expect the name's value.
+   */
+  private void beforeName() throws IOException {
+    JsonScope context = peek();
+    if (context == JsonScope.NONEMPTY_OBJECT) { // first in object
+      out.write(',');
+    } else if (context != JsonScope.EMPTY_OBJECT) { // not in an object!
+      throw new IllegalStateException("Nesting problem: " + stack);
+    }
+    newline();
+    replaceTop(JsonScope.DANGLING_NAME);
+  }
+
+  /**
+   * Inserts any necessary separators and whitespace before a literal value,
+   * inline array, or inline object. Also adjusts the stack to expect either a
+   * closing bracket or another element.
+   *
+   * @param root true if the value is a new array or object, the two values
+   *     permitted as top-level elements.
+   */
+  private void beforeValue(boolean root) throws IOException {
+    switch (peek()) {
+    case EMPTY_DOCUMENT: // first in document
+      if (!lenient && !root) {
+        throw new IllegalStateException(
+            "JSON must start with an array or an object.");
+      }
+      replaceTop(JsonScope.NONEMPTY_DOCUMENT);
+      break;
+
+    case EMPTY_ARRAY: // first in array
+      replaceTop(JsonScope.NONEMPTY_ARRAY);
+      newline();
+      break;
+
+    case NONEMPTY_ARRAY: // another in array
+      out.append(',');
+      newline();
+      break;
+
+    case DANGLING_NAME: // value for name
+      out.append(separator);
+      replaceTop(JsonScope.NONEMPTY_OBJECT);
+      break;
+
+    case NONEMPTY_DOCUMENT:
+        throw new IllegalStateException(
+            "JSON must have only one top-level value.");
+
+    default:
+      throw new IllegalStateException("Nesting problem: " + stack);
+    }
+  }
+}

src/com/bukkit/mcteam/gson/stream/MalformedJsonException.java

@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2010 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.bukkit.mcteam.gson.stream;
+
+import java.io.IOException;
+
+/**
+ * Thrown when a reader encounters malformed JSON. Some syntax errors can be
+ * ignored by calling {@link JsonReader#setLenient(boolean)}.
+ */
+public final class MalformedJsonException extends IOException {
+  private static final long serialVersionUID = 1L;
+
+  public MalformedJsonException(String msg) {
+    super(msg);
+  }
+
+  public MalformedJsonException(String msg, Throwable throwable) {
+    super(msg);
+    // Using initCause() instead of calling super() because Java 1.5 didn't retrofit IOException
+    // with a constructor with Throwable. This was done in Java 1.6
+    initCause(throwable);
+  }
+
+  public MalformedJsonException(Throwable throwable) {
+    // Using initCause() instead of calling super() because Java 1.5 didn't retrofit IOException
+    // with a constructor with Throwable. This was done in Java 1.6
+    initCause(throwable);
+  }
+}