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package com.intellectualcrafters.configuration.file;
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import java.io.BufferedReader;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.FileNotFoundException;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.InputStreamReader;
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import java.io.OutputStreamWriter;
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import java.io.Reader;
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import java.io.Writer;
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import java.nio.charset.Charset;
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import java.nio.charset.StandardCharsets;
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import org.yaml.snakeyaml.external.biz.base64Coder.Base64Coder;
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import com.intellectualcrafters.configuration.Configuration;
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import com.intellectualcrafters.configuration.InvalidConfigurationException;
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import com.intellectualcrafters.configuration.MemoryConfiguration;
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/**
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* This is a base class for all File based implementations of {@link
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* Configuration}
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*/
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public abstract class FileConfiguration extends MemoryConfiguration {
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/**
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* This value specified that the system default encoding should be
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* completely ignored, as it cannot handle the ASCII character set, or it
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* is a strict-subset of UTF8 already (plain ASCII).
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*
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* @deprecated temporary compatibility measure
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*/
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@Deprecated
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public static final boolean UTF8_OVERRIDE;
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/**
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* This value specifies if the system default encoding is unicode, but
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* cannot parse standard ASCII.
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*
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* @deprecated temporary compatibility measure
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*/
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@Deprecated
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public static final boolean UTF_BIG;
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/**
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* This value specifies if the system supports unicode.
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*
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* @deprecated temporary compatibility measure
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*/
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@Deprecated
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public static final boolean SYSTEM_UTF;
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static {
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final byte[] testBytes = Base64Coder.decode("ICEiIyQlJicoKSorLC0uLzAxMjM0NTY3ODk6Ozw9Pj9AQUJDREVGR0hJSktMTU5PUFFSU1RVVldYWVpbXF1eX2BhYmNkZWZnaGlqa2xtbm9wcXJzdHV2d3h5ent8fX4NCg==");
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final String testString = " !\"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~\r\n";
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final Charset defaultCharset = Charset.defaultCharset();
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final String resultString = new String(testBytes, defaultCharset);
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final boolean trueUTF = defaultCharset.name().contains("UTF");
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UTF8_OVERRIDE = !testString.equals(resultString) || defaultCharset.equals(Charset.forName("US-ASCII"));
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SYSTEM_UTF = trueUTF || UTF8_OVERRIDE;
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UTF_BIG = trueUTF && UTF8_OVERRIDE;
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}
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/**
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* Creates an empty {@link FileConfiguration} with no default values.
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*/
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public FileConfiguration() {
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super();
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}
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/**
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* Creates an empty {@link FileConfiguration} using the specified {@link
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* Configuration} as a source for all default values.
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*
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* @param defaults Default value provider
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*/
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public FileConfiguration(Configuration defaults) {
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super(defaults);
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}
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/**
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* Saves this {@link FileConfiguration} to the specified location.
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* <p>
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* If the file does not exist, it will be created. If already exists, it
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* will be overwritten. If it cannot be overwritten or created, an
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* exception will be thrown.
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* <p>
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* This method will save using the system default encoding, or possibly
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* using UTF8.
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*
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* @param file File to save to.
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* @throws IOException Thrown when the given file cannot be written to for
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* any reason.
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* @throws IllegalArgumentException Thrown when file is null.
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*/
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public void save(File file) throws IOException {
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if (file == null) throw new NullPointerException("File cannot be null");
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file.getParentFile().mkdirs();
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String data = saveToString();
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Writer writer = new OutputStreamWriter(new FileOutputStream(file), UTF8_OVERRIDE && !UTF_BIG ? StandardCharsets.UTF_8 : Charset.defaultCharset());
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try {
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writer.write(data);
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} finally {
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writer.close();
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}
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}
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/**
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* Saves this {@link FileConfiguration} to the specified location.
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* <p>
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* If the file does not exist, it will be created. If already exists, it
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* will be overwritten. If it cannot be overwritten or created, an
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* exception will be thrown.
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* <p>
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* This method will save using the system default encoding, or possibly
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* using UTF8.
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*
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* @param file File to save to.
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* @throws IOException Thrown when the given file cannot be written to for
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* any reason.
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* @throws IllegalArgumentException Thrown when file is null.
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*/
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public void save(String file) throws IOException {
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if (file == null) throw new NullPointerException("File cannot be null");
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save(new File(file));
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}
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/**
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* Saves this {@link FileConfiguration} to a string, and returns it.
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*
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* @return String containing this configuration.
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*/
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public abstract String saveToString();
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/**
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* Loads this {@link FileConfiguration} from the specified location.
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* <p>
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* All the values contained within this configuration will be removed,
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* leaving only settings and defaults, and the new values will be loaded
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* from the given file.
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* <p>
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* If the file cannot be loaded for any reason, an exception will be
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* thrown.
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* <p>
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* This will attempt to use the {@link Charset#defaultCharset()} for
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* files, unless {@link #UTF8_OVERRIDE} but not {@link #UTF_BIG} is
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* specified.
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*
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* @param file File to load from.
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* @throws FileNotFoundException Thrown when the given file cannot be
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* opened.
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* @throws IOException Thrown when the given file cannot be read.
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* @throws InvalidConfigurationException Thrown when the given file is not
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* a valid Configuration.
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* @throws IllegalArgumentException Thrown when file is null.
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*/
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public void load(File file) throws FileNotFoundException, IOException, InvalidConfigurationException {
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if (file == null) throw new NullPointerException("File cannot be null");
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final FileInputStream stream = new FileInputStream(file);
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load(new InputStreamReader(stream, UTF8_OVERRIDE && !UTF_BIG ? StandardCharsets.UTF_8 : Charset.defaultCharset()));
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}
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/**
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* Loads this {@link FileConfiguration} from the specified stream.
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* <p>
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* All the values contained within this configuration will be removed,
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* leaving only settings and defaults, and the new values will be loaded
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* from the given stream.
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* <p>
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* This will attempt to use the {@link Charset#defaultCharset()}, unless
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* {@link #UTF8_OVERRIDE} or {@link #UTF_BIG} is specified.
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*
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* @param stream Stream to load from
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* @throws IOException Thrown when the given file cannot be read.
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* @throws InvalidConfigurationException Thrown when the given file is not
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* a valid Configuration.
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* @throws IllegalArgumentException Thrown when stream is null.
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* @deprecated This does not consider encoding
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* @see #load(Reader)
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*/
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@Deprecated
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public void load(InputStream stream) throws IOException, InvalidConfigurationException {
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if (stream == null) throw new NullPointerException("Stream cannot be null");
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load(new InputStreamReader(stream, UTF8_OVERRIDE ? StandardCharsets.UTF_8 : Charset.defaultCharset()));
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}
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/**
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* Loads this {@link FileConfiguration} from the specified reader.
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* <p>
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* All the values contained within this configuration will be removed,
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* leaving only settings and defaults, and the new values will be loaded
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* from the given stream.
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*
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* @param reader the reader to load from
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* @throws IOException thrown when underlying reader throws an IOException
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* @throws InvalidConfigurationException thrown when the reader does not
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* represent a valid Configuration
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* @throws IllegalArgumentException thrown when reader is null
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*/
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public void load(Reader reader) throws IOException, InvalidConfigurationException {
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BufferedReader input = reader instanceof BufferedReader ? (BufferedReader) reader : new BufferedReader(reader);
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StringBuilder builder = new StringBuilder();
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try {
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String line;
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while ((line = input.readLine()) != null) {
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builder.append(line);
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builder.append('\n');
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}
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} finally {
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input.close();
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}
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loadFromString(builder.toString());
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}
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/**
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* Loads this {@link FileConfiguration} from the specified location.
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* <p>
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* All the values contained within this configuration will be removed,
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* leaving only settings and defaults, and the new values will be loaded
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* from the given file.
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* <p>
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* If the file cannot be loaded for any reason, an exception will be
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* thrown.
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*
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* @param file File to load from.
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* @throws FileNotFoundException Thrown when the given file cannot be
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* opened.
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* @throws IOException Thrown when the given file cannot be read.
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* @throws InvalidConfigurationException Thrown when the given file is not
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* a valid Configuration.
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* @throws IllegalArgumentException Thrown when file is null.
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*/
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public void load(String file) throws FileNotFoundException, IOException, InvalidConfigurationException {
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if (file == null) throw new NullPointerException("File cannot be null");
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load(new File(file));
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}
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/**
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* Loads this {@link FileConfiguration} from the specified string, as
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* opposed to from file.
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* <p>
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* All the values contained within this configuration will be removed,
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* leaving only settings and defaults, and the new values will be loaded
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* from the given string.
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* <p>
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* If the string is invalid in any way, an exception will be thrown.
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*
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* @param contents Contents of a Configuration to load.
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* @throws InvalidConfigurationException Thrown if the specified string is
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* invalid.
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* @throws IllegalArgumentException Thrown if contents is null.
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*/
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public abstract void loadFromString(String contents) throws InvalidConfigurationException;
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/**
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* Compiles the header for this {@link FileConfiguration} and returns the
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* result.
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* <p>
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* This will use the header from {@link #options()} -> {@link
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* FileConfigurationOptions#header()}, respecting the rules of {@link
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* FileConfigurationOptions#copyHeader()} if set.
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*
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* @return Compiled header
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*/
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protected abstract String buildHeader();
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@Override
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public FileConfigurationOptions options() {
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if (options == null) {
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options = new FileConfigurationOptions(this);
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}
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return (FileConfigurationOptions) options;
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}
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}
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