Minor code tweaks

Bukkit/src/main/java/com/github/intellectualsites/plotsquared/bukkit/BukkitMain.java

@@ -171,7 +171,7 @@ public final class BukkitMain extends JavaPlugin implements Listener, IPlotMain
                         getLogger().info("-------- PlotSquared Update Check --------");
                         if (throwable != null) {
                             getLogger().severe(String
-                                .format("Could not check for update. Reason: %s",
+                                .format("Could not check for updates. Reason: %s",
                                     throwable.getMessage()));
                         } else {
                             if (updateDescription == null) {
@@ -180,8 +180,8 @@ public final class BukkitMain extends JavaPlugin implements Listener, IPlotMain
                             } else {
                                 getLogger()
                                     .info("There appears to be a PlotSquared update available!");
-                                getLogger().info(String.format("You are running version %s,"
+                                getLogger().info(String.format(
-                                        + " the newest available version is %s",
+                                    "You are running version %s, the newest available version is %s",
                                     getPluginVersionString(), updateDescription.getVersion()));
                                 getLogger().info(
                                     String.format("Update URL: %s", updateDescription.getUrl()));
@@ -540,6 +540,14 @@ public final class BukkitMain extends JavaPlugin implements Listener, IPlotMain
                         case PUFFERFISH:
                         case PHANTOM:
                         case ILLUSIONER:
+                        case CAT:
+                        case PANDA:
+                        case FOX:
+                        case PILLAGER:
+                        case TRADER_LLAMA:
+                        case WANDERING_TRADER:
+                        case RAVAGER:
+                            //case BEE:
                         default: {
                             if (Settings.Enabled_Components.KILL_ROAD_MOBS) {
                                 Location location = entity.getLocation();

Bukkit/src/main/java/com/github/intellectualsites/plotsquared/bukkit/generator/BukkitPlotGenerator.java

@@ -73,7 +73,9 @@ public class BukkitPlotGenerator extends ChunkGenerator
         return this.platformGenerator;
     }
 
-    @Override @NotNull public List<BlockPopulator> getDefaultPopulators(@NotNull World world) {
+    @Override
+    @NotNull
+    public List<BlockPopulator> getDefaultPopulators(@NotNull World world) {
         try {
             if (!this.loaded) {
                 String name = world.getName();
@@ -117,7 +119,8 @@ public class BukkitPlotGenerator extends ChunkGenerator
         return toAdd;
     }
 
-    @Override @NotNull
+    @Override
+    @NotNull
     public ChunkData generateChunkData(@NotNull World world, @NotNull Random random, int x, int z,
         @NotNull BiomeGrid biome) {
 

Bukkit/src/main/java/com/github/intellectualsites/plotsquared/bukkit/listeners/PlayerEvents.java

@@ -640,7 +640,7 @@ import java.util.regex.Pattern;
         Optional<List<String>> flag = plot.getFlag(Flags.BLOCKED_CMDS);
         if (flag.isPresent() && !Permissions
             .hasPermission(plotPlayer, Captions.PERMISSION_ADMIN_INTERACT_BLOCKED_CMDS)) {
-            List<String> blocked_cmds = flag.get();
+            List<String> blockedCommands = flag.get();
             String part = parts[0];
             if (parts[0].contains(":")) {
                 part = parts[0].split(":")[1];
@@ -674,7 +674,7 @@ import java.util.regex.Pattern;
             if (!s1.equals(part)) {
                 msg = msg.replace(s1, part);
             }
-            for (String s : blocked_cmds) {
+            for (String s : blockedCommands) {
                 Pattern pattern;
                 if (!RegExUtil.compiledPatterns.containsKey(s)) {
                     RegExUtil.compiledPatterns.put(s, pattern = Pattern.compile(s));
@@ -745,8 +745,8 @@ import java.util.regex.Pattern;
                                 .text(" --------").color("$2").send(pp);
                             new PlotMessage("There appears to be a PlotSquared update available!")
                                 .color("$1").send(pp);
-                            new PlotMessage(String.format("You are running version %s,"
+                            new PlotMessage(String.format(
-                                    + " the newest available version is %s",
+                                "You are running version %s, the newest available version is %s",
                                 bukkitMain.getPluginVersionString(),
                                 updateDescription.getVersion())).color("$1").send(pp);
                             new PlotMessage("Update URL").color("$1").text(": ").color("$2")
@@ -1340,12 +1340,6 @@ import java.util.regex.Pattern;
                 if (Flags.ICE_FORM.isFalse(plot)) {
                     event.setCancelled(true);
                 }
-                return;
-            case STONE:
-            case OBSIDIAN:
-            case COBBLESTONE:
-                // TODO event ?
-                return;
         }
     }
 
@@ -1491,8 +1485,7 @@ import java.util.regex.Pattern;
             event.setCancelled(true);
             return;
         }
-        List<Block> blocks = event.getBlocks();
+        for (Block block1 : event.getBlocks()) {
-        for (Block block1 : blocks) {
             Location bloc = BukkitUtil.getLocation(block1.getLocation());
             if (!area.contains(bloc.getX(), bloc.getZ()) || !area
                 .contains(bloc.getX() + relative.getBlockX(), bloc.getZ() + relative.getBlockZ())) {
@@ -1650,11 +1643,11 @@ import java.util.regex.Pattern;
             location = BukkitUtil.getLocation(blocks.get(i).getLocation());
             Plot plot = area.getOwnedPlot(location);
             /*
-             * plot -> the base plot of the merged area
+             * plot → the base plot of the merged area
-             * origin -> the plot where the event gets called
+             * origin → the plot where the event gets called
              */
 
-            // Are plot and origin not the same AND are both plots merged
+            // Are plot and origin different AND are both plots merged
             if (!Objects.equals(plot, origin) && (!plot.isMerged() && !origin.isMerged())) {
                 event.getBlocks().remove(i);
             }
@@ -2025,6 +2018,18 @@ import java.util.regex.Pattern;
                 return;
             }
         }
+        if (eventType == null) {
+            PlotSquared.log("Please report this to PlotSquared Developers: ");
+            PlotSquared.log("Action: " + event.getAction().toString());
+            PlotSquared.log("HasItem: " + event.hasItem());
+            PlotSquared.log("HasBlock: " + event.hasBlock());
+            PlotSquared.log("getItem: " + (event.hasItem() ? Objects.requireNonNull(event.getItem())
+                .toString() : "null"));
+            PlotSquared.log("getBlockFace: " + (event.getBlockFace() != null ? event.getBlockFace().toString() : "null"));
+            PlotSquared.log("isBlockInHand: " + (event.isBlockInHand()));
+            PlotSquared.log("getClickedBlock: " + (event.getClickedBlock() != null ? event.getClickedBlock().toString() : "null"));
+            return;
+        }
         if (!EventUtil.manager.checkPlayerBlockEvent(pp, eventType, location, blocktype1, true)) {
             event.setCancelled(true);
             event.setUseInteractedBlock(Event.Result.DENY);
@@ -2372,6 +2377,11 @@ import java.util.regex.Pattern;
             return;
         }
         Player p = event.getPlayer();
+        if (p != null) {
+            PlotSquared.debug("PlotSquared does not support HangingPlaceEvent for non-players.");
+            event.setCancelled(true);
+            return;
+        }
         PlotPlayer pp = BukkitUtil.getPlayer(p);
         Plot plot = area.getPlot(location);
         if (plot == null) {

Bukkit/src/main/java/com/github/intellectualsites/plotsquared/bukkit/util/BukkitVersion.java

@@ -2,6 +2,4 @@ package com.github.intellectualsites.plotsquared.bukkit.util;
 
 public class BukkitVersion {
     public static int[] v1_13_2 = {1, 13, 2};
-    public static int[] v1_13_1 = {1, 13, 1};
-    public static int[] v1_13_0 = {1, 13, 0};
 }

Bukkit/src/main/java/com/github/intellectualsites/plotsquared/bukkit/uuid/LowerOfflineUUIDWrapper.java

@@ -6,6 +6,7 @@ import com.google.common.base.Charsets;
 import org.bukkit.OfflinePlayer;
 import org.jetbrains.annotations.NotNull;
 
+import java.util.Objects;
 import java.util.UUID;
 
 public class LowerOfflineUUIDWrapper extends OfflineUUIDWrapper {
@@ -21,7 +22,7 @@ public class LowerOfflineUUIDWrapper extends OfflineUUIDWrapper {
 
     @Override public UUID getUUID(OfflinePlayer player) {
         return UUID.nameUUIDFromBytes(
-            ("OfflinePlayer:" + player.getName().toLowerCase()).getBytes(Charsets.UTF_8));
+            ("OfflinePlayer:" + Objects.requireNonNull(player.getName()).toLowerCase()).getBytes(Charsets.UTF_8));
     }
 
     @Override public UUID getUUID(String name) {

Bukkit/src/main/java/com/github/intellectualsites/plotsquared/bukkit/uuid/SQLUUIDHandler.java

@@ -52,8 +52,7 @@ public class SQLUUIDHandler extends UUIDHandlerImplementation {
         }
 
         try (PreparedStatement stmt = getConnection().prepareStatement(
-            "CREATE TABLE IF NOT EXISTS `usercache` (uuid VARCHAR(32) NOT NULL, username VARCHAR(32) NOT NULL, PRIMARY KEY (uuid, username)"
+            "CREATE TABLE IF NOT EXISTS `usercache` (uuid VARCHAR(32) NOT NULL, username VARCHAR(32) NOT NULL, PRIMARY KEY (uuid, username))")) {
-                + ')')) {
             stmt.execute();
         } catch (SQLException e) {
             e.printStackTrace();
@@ -237,7 +236,7 @@ public class SQLUUIDHandler extends UUIDHandlerImplementation {
         return false;
     }
 
-    private class SQLUUIDHandlerException extends RuntimeException {
+    private static class SQLUUIDHandlerException extends RuntimeException {
 
         SQLUUIDHandlerException(String s, Throwable c) {
             super("SQLUUIDHandler caused an exception: " + s, c);

Core/src/main/java/com/github/intellectualsites/plotsquared/plot/object/BlockBucket.java

@@ -24,7 +24,7 @@ import java.util.regex.Matcher;
  * A block bucket is a container of block types, where each block
  * has a specified chance of being randomly picked
  */
-@EqualsAndHashCode(of={"input"}) @SuppressWarnings({"unused", "WeakerAccess"})
+@EqualsAndHashCode(of = {"input"}) @SuppressWarnings({"unused", "WeakerAccess"})
 public final class BlockBucket implements ConfigurationSerializable {
     private boolean compiled;
 
@@ -78,7 +78,7 @@ public final class BlockBucket implements ConfigurationSerializable {
     private void addBlock(@NonNull final BlockState block, double chance) {
         if (chance == -1) chance = 1;
         String prefix = input.length() == 0 ? "" : ",";
-        input.append(prefix).append(chance + "%" + prefix);
+        input.append(prefix).append(chance).append("%").append(prefix);
         this.compiled = false;
     }
 
@@ -116,7 +116,7 @@ public final class BlockBucket implements ConfigurationSerializable {
                 this.single = BlockUtil.get(string);
                 this.pattern = new BlockPattern(single);
                 return;
-            } catch (Exception ignore) {}
+            } catch (Exception ignore) { }
         }
         for (int i = 0; i < blocksStr.length; i++) {
             String entry = blocksStr[i];
@@ -163,7 +163,7 @@ public final class BlockBucket implements ConfigurationSerializable {
         return ImmutableMap.of("blocks", this.toString());
     }
 
-    @Getter @EqualsAndHashCode @RequiredArgsConstructor private final static class Range {
+    @Getter @EqualsAndHashCode @RequiredArgsConstructor private static final class Range {
 
         private final int min;
         private final int max;

Core/src/main/java/com/github/intellectualsites/plotsquared/plot/object/Location.java

@@ -105,6 +105,10 @@ public class Location implements Cloneable, Comparable<Location> {
         return area != null && area.getPlotAbs(this) == null;
     }
 
+    /**
+     * Checks if anyone owns a plot at the current location.
+     * @return true if the location is a road, not a plot area, or if the plot is unclaimed.
+     */
     public boolean isUnownedPlotArea() {
         PlotArea area = getPlotArea();
         return area != null && area.getOwnedPlotAbs(this) == null;

Core/src/main/java/com/github/intellectualsites/plotsquared/plot/object/PlotArea.java

@@ -117,7 +117,7 @@ public abstract class PlotArea {
     }
 
     /**
-     * Returns the region for this PlotArea or a CuboidRegion encompassing
+     * Returns the region for this PlotArea, or a CuboidRegion encompassing
      * the whole world if none exists.
      *
      * @return CuboidRegion
@@ -627,7 +627,7 @@ public abstract class PlotArea {
         this.meta.put(key, value);
     }
 
-    @NotNull public <T> T getMeta(@Nullable final String key, @NotNull final T def) {
+    @NotNull public <T> T getMeta(@NotNull final String key, @NotNull final T def) {
         final Object v = getMeta(key);
         return v == null ? def : (T) v;
     }
@@ -637,7 +637,8 @@ public abstract class PlotArea {
      * <br>
      * For persistent metadata use the flag system
      */
-    @Nullable public Object getMeta(@NotNull final String key) {
+    @Nullable
+    public Object getMeta(@NotNull final String key) {
         if (this.meta != null) {
             return this.meta.get(key);
         }

Core/src/main/java/com/github/intellectualsites/plotsquared/plot/util/EventUtil.java

@@ -16,6 +16,7 @@ import com.github.intellectualsites.plotsquared.plot.object.worlds.SinglePlotAre
 import com.github.intellectualsites.plotsquared.plot.util.expiry.ExpireManager;
 import com.sk89q.worldedit.world.block.BlockType;
 import com.sk89q.worldedit.world.block.BlockTypes;
+import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
 import java.util.List;
@@ -100,7 +101,7 @@ public abstract class EventUtil {
         }
     }
 
-    public boolean checkPlayerBlockEvent(PlotPlayer player, PlayerBlockEventType type,
+    public boolean checkPlayerBlockEvent(PlotPlayer player, @NotNull PlayerBlockEventType type,
         Location location, BlockType blockType, boolean notifyPerms) {
         PlotArea area = location.getPlotArea();
         assert area != null;

Core/src/main/java/com/github/intellectualsites/plotsquared/plot/util/block/ChunkBlockQueue.java

@@ -5,6 +5,7 @@ import com.sk89q.worldedit.math.BlockVector3;
 import com.sk89q.worldedit.world.biome.BiomeType;
 import com.sk89q.worldedit.world.block.BaseBlock;
 import com.sk89q.worldedit.world.block.BlockState;
+import org.jetbrains.annotations.Nullable;
 
 import java.util.Arrays;
 
@@ -14,13 +15,13 @@ public class ChunkBlockQueue extends ScopedLocalBlockQueue {
     public final BlockState[][][] result;
     private final int width;
     private final int length;
-    private final int area;
+    @Deprecated private final int area;
     private final BlockVector3 bot;
     private final BlockVector3 top;
 
     public ChunkBlockQueue(BlockVector3 bot, BlockVector3 top, boolean biomes) {
         super(null, new Location(null, 0, 0, 0), new Location(null, 15, 255, 15));
-        this.width = top.getX() - bot.getX()+ 1;
+        this.width = top.getX() - bot.getX() + 1;
         this.length = top.getZ() - bot.getZ() + 1;
         this.area = width * length;
         this.result = new BlockState[256][][];
@@ -70,7 +71,9 @@ public class ChunkBlockQueue extends ScopedLocalBlockQueue {
         return true;
     }
 
-    @Override public BlockState getBlock(int x, int y, int z) {
+    @Override
+    @Nullable
+    public BlockState getBlock(int x, int y, int z) {
         BlockState[][] blocksY = result[y];
         if (blocksY != null) {
             BlockState[] blocksYZ = blocksY[z];
@@ -81,7 +84,9 @@ public class ChunkBlockQueue extends ScopedLocalBlockQueue {
         return null;
     }
 
-    @Override public String getWorld() {
+    @Override
+    @Nullable
+    public String getWorld() {
         return null;
     }