testserver/Spigot-Server-Patches/0004-MC-Utils.patch

From 42457b83f3c35c1e566f635b53505bc0c53f1eaf Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Mon, 28 Mar 2016 20:55:47 -0400
Subject: [PATCH] MC Utils


diff --git a/src/main/java/net/minecraft/server/BaseBlockPosition.java b/src/main/java/net/minecraft/server/BaseBlockPosition.java
index c3e990bdff..e2a7b4be2c 100644
--- a/src/main/java/net/minecraft/server/BaseBlockPosition.java
+++ b/src/main/java/net/minecraft/server/BaseBlockPosition.java
@@ -93,7 +93,7 @@ public class BaseBlockPosition implements Comparable<BaseBlockPosition> {
         return MoreObjects.toStringHelper(this).add("x", this.getX()).add("y", this.getY()).add("z", this.getZ()).toString();
     }
 
-    public int compareTo(Object object) {
+    public int compareTo(BaseBlockPosition object) { // Paper - decompile fix
         return this.l((BaseBlockPosition) object);
     }
 }
diff --git a/src/main/java/net/minecraft/server/BlockPosition.java b/src/main/java/net/minecraft/server/BlockPosition.java
index 9f3aa24590..7dbea90902 100644
--- a/src/main/java/net/minecraft/server/BlockPosition.java
+++ b/src/main/java/net/minecraft/server/BlockPosition.java
@@ -10,7 +10,6 @@ import org.apache.logging.log4j.Logger;
 @Immutable
 public class BlockPosition extends BaseBlockPosition {
 
-    private static final Logger b = LogManager.getLogger();
     public static final BlockPosition ZERO = new BlockPosition(0, 0, 0);
     private static final int c = 1 + MathHelper.e(MathHelper.c(30000000));
     private static final int d = BlockPosition.c;
@@ -45,6 +44,7 @@ public class BlockPosition extends BaseBlockPosition {
         return d0 == 0.0D && d1 == 0.0D && d2 == 0.0D ? this : new BlockPosition((double) this.getX() + d0, (double) this.getY() + d1, (double) this.getZ() + d2);
     }
 
+    public BlockPosition add(int i, int j, int k) {return a(i, j, k);} // Paper - OBFHELPER
     public BlockPosition a(int i, int j, int k) {
         return i == 0 && j == 0 && k == 0 ? this : new BlockPosition(this.getX() + i, this.getY() + j, this.getZ() + k);
     }
@@ -385,6 +385,7 @@ public class BlockPosition extends BaseBlockPosition {
             return this.d;
         }
 
+        public BlockPosition.MutableBlockPosition setValues(int i, int j, int k) { return c(i, j, k);} // Paper - OBFHELPER
         public BlockPosition.MutableBlockPosition c(int i, int j, int k) {
             this.b = i;
             this.c = j;
@@ -392,6 +393,7 @@ public class BlockPosition extends BaseBlockPosition {
             return this;
         }
 
+        public BlockPosition.MutableBlockPosition setValues(double d0, double d1, double d2) { return c(d0, d1, d2);} // Paper - OBFHELPER
         public BlockPosition.MutableBlockPosition c(double d0, double d1, double d2) {
             return this.c(MathHelper.floor(d0), MathHelper.floor(d1), MathHelper.floor(d2));
         }
diff --git a/src/main/java/net/minecraft/server/Chunk.java b/src/main/java/net/minecraft/server/Chunk.java
index 03c96de98b..2d06202da7 100644
--- a/src/main/java/net/minecraft/server/Chunk.java
+++ b/src/main/java/net/minecraft/server/Chunk.java
@@ -28,7 +28,7 @@ import com.google.common.collect.Lists; // CraftBukkit
 public class Chunk implements IChunkAccess {
 
     private static final Logger e = LogManager.getLogger();
-    public static final ChunkSection a = null;
+    public static final ChunkSection a = null; public static final ChunkSection EMPTY_CHUNK_SECTION = Chunk.a; // Paper - OBFHELPER
     private final ChunkSection[] sections;
     private final BiomeBase[] g;
     private final boolean[] h;
@@ -693,6 +693,7 @@ public class Chunk implements IChunkAccess {
         return this.a(blockposition, Chunk.EnumTileEntityState.CHECK);
     }
 
+    @Nullable public final TileEntity getTileEntityImmediately(BlockPosition pos) { return this.a(pos, EnumTileEntityState.IMMEDIATE); } // Paper - OBFHELPER
     @Nullable
     public TileEntity a(BlockPosition blockposition, Chunk.EnumTileEntityState chunk_enumtileentitystate) {
         // CraftBukkit start
diff --git a/src/main/java/net/minecraft/server/ChunkCoordIntPair.java b/src/main/java/net/minecraft/server/ChunkCoordIntPair.java
index 00a530c51c..2947d9ff6a 100644
--- a/src/main/java/net/minecraft/server/ChunkCoordIntPair.java
+++ b/src/main/java/net/minecraft/server/ChunkCoordIntPair.java
@@ -24,6 +24,8 @@ public class ChunkCoordIntPair {
         return a(this.x, this.z);
     }
 
+    public static long asLong(final BlockPosition pos) { return a(pos.getX() >> 4, pos.getZ() >> 4); } // Paper - OBFHELPER
+    public static long asLong(int x, int z) { return a(x, z); } // Paper - OBFHELPER
     public static long a(int i, int j) {
         return (long) i & 4294967295L | ((long) j & 4294967295L) << 32;
     }
diff --git a/src/main/java/net/minecraft/server/EntityCreature.java b/src/main/java/net/minecraft/server/EntityCreature.java
index b347567699..ceed50d8de 100644
--- a/src/main/java/net/minecraft/server/EntityCreature.java
+++ b/src/main/java/net/minecraft/server/EntityCreature.java
@@ -6,6 +6,7 @@ import org.bukkit.event.entity.EntityUnleashEvent;
 
 public abstract class EntityCreature extends EntityInsentient {
 
+    public org.bukkit.craftbukkit.entity.CraftCreature getBukkitEntity() { return (org.bukkit.craftbukkit.entity.CraftCreature) super.getBukkitEntity(); } // Paper
     private BlockPosition a;
     private float b;
 
diff --git a/src/main/java/net/minecraft/server/EntityLiving.java b/src/main/java/net/minecraft/server/EntityLiving.java
index 514c951516..5b33997529 100644
--- a/src/main/java/net/minecraft/server/EntityLiving.java
+++ b/src/main/java/net/minecraft/server/EntityLiving.java
@@ -122,6 +122,7 @@ public abstract class EntityLiving extends Entity {
     public org.bukkit.craftbukkit.attribute.CraftAttributeMap craftAttributes;
     public boolean collides = true;
     public boolean canPickUpLoot;
+    public org.bukkit.craftbukkit.entity.CraftLivingEntity getBukkitEntity() { return (org.bukkit.craftbukkit.entity.CraftLivingEntity) super.getBukkitEntity(); } // Paper
 
     @Override
     public float getBukkitYaw() {
diff --git a/src/main/java/net/minecraft/server/EntityMonster.java b/src/main/java/net/minecraft/server/EntityMonster.java
index 494ce0bc06..04c3756ea3 100644
--- a/src/main/java/net/minecraft/server/EntityMonster.java
+++ b/src/main/java/net/minecraft/server/EntityMonster.java
@@ -2,6 +2,7 @@ package net.minecraft.server;
 
 public abstract class EntityMonster extends EntityCreature implements IMonster {
 
+    public org.bukkit.craftbukkit.entity.CraftMonster getBukkitEntity() { return (org.bukkit.craftbukkit.entity.CraftMonster) super.getBukkitEntity(); } // Paper
     protected EntityMonster(EntityTypes<?> entitytypes, World world) {
         super(entitytypes, world);
         this.b_ = 5;
diff --git a/src/main/java/net/minecraft/server/EntityTypes.java b/src/main/java/net/minecraft/server/EntityTypes.java
index ca2a14d7ac..9a513b4e3a 100644
--- a/src/main/java/net/minecraft/server/EntityTypes.java
+++ b/src/main/java/net/minecraft/server/EntityTypes.java
@@ -3,6 +3,7 @@ package net.minecraft.server;
 import com.mojang.datafixers.DataFixUtils;
 import com.mojang.datafixers.types.Type;
 
+import java.util.Map;
 import java.util.Set;
 import java.util.UUID;
 import java.util.function.Function;
@@ -121,9 +122,20 @@ public class EntityTypes<T extends Entity> {
     public static <T extends Entity> EntityTypes<T> a(String s, EntityTypes.a<T> entitytypes_a) {
         EntityTypes entitytypes = entitytypes_a.a(s);
 
-        EntityTypes.REGISTRY.a(new MinecraftKey(s), entitytypes);
+        // Paper start
+        if (clsToKeyMap == null ) clsToKeyMap = new java.util.HashMap<>();
+        if (clsToTypeMap == null ) clsToTypeMap = new java.util.HashMap<>();
+
+        MinecraftKey key = new MinecraftKey(s);
+        Class<? extends T> entityClass = entitytypes_a.getEntityClass();
+        EntityTypes.REGISTRY.a(key, entitytypes);
+        clsToKeyMap.put(entityClass, key);
+        clsToTypeMap.put(entityClass, org.bukkit.entity.EntityType.fromName(s));
         return entitytypes;
     }
+    public static Map<Class<? extends Entity>, MinecraftKey> clsToKeyMap;
+    public static Map<Class<? extends Entity>, org.bukkit.entity.EntityType> clsToTypeMap;
+    // Paper end
 
     @Nullable
     public static MinecraftKey getName(EntityTypes<?> entitytypes) {
@@ -277,7 +289,7 @@ public class EntityTypes<T extends Entity> {
 
     public static class a<T extends Entity> {
 
-        private final Class<? extends T> a;
+        private final Class<? extends T> a; public Class<? extends T> getEntityClass() { return a; } // Paper - OBFHELPER
         private final Function<? super World, ? extends T> b;
         private boolean c = true;
         private boolean d = true;
diff --git a/src/main/java/net/minecraft/server/ItemStack.java b/src/main/java/net/minecraft/server/ItemStack.java
index 359979cc1c..0c54eaa529 100644
--- a/src/main/java/net/minecraft/server/ItemStack.java
+++ b/src/main/java/net/minecraft/server/ItemStack.java
@@ -26,6 +26,7 @@ import org.bukkit.TreeType;
 import org.bukkit.block.BlockState;
 import org.bukkit.craftbukkit.block.CraftBlock;
 import org.bukkit.craftbukkit.block.CraftBlockState;
+import org.bukkit.craftbukkit.inventory.CraftItemStack;
 import org.bukkit.craftbukkit.util.CraftMagicNumbers;
 import org.bukkit.entity.Player;
 import org.bukkit.event.block.BlockFertilizeEvent;
@@ -561,6 +562,17 @@ public final class ItemStack {
         return this.tag != null ? this.tag.getList("Enchantments", 10) : new NBTTagList();
     }
 
+    // Paper start - (this is just a good no conflict location)
+    public org.bukkit.inventory.ItemStack asBukkitMirror() {
+        return CraftItemStack.asCraftMirror(this);
+    }
+    public org.bukkit.inventory.ItemStack asBukkitCopy() {
+        return CraftItemStack.asCraftMirror(this.cloneItemStack());
+    }
+    public static ItemStack fromBukkitCopy(org.bukkit.inventory.ItemStack itemstack) {
+        return CraftItemStack.asNMSCopy(itemstack);
+    }
+    // Paper end
     public void setTag(@Nullable NBTTagCompound nbttagcompound) {
         this.tag = nbttagcompound;
     }
diff --git a/src/main/java/net/minecraft/server/LotoSelectorEntry.java b/src/main/java/net/minecraft/server/LotoSelectorEntry.java
index a540167d6d..add618866b 100644
--- a/src/main/java/net/minecraft/server/LotoSelectorEntry.java
+++ b/src/main/java/net/minecraft/server/LotoSelectorEntry.java
@@ -85,11 +85,11 @@ public abstract class LotoSelectorEntry {
             return jsonobject;
         }
 
-        public JsonElement serialize(Object object, Type type, JsonSerializationContext jsonserializationcontext) {
+        public JsonElement serialize(LotoSelectorEntry object, Type type, JsonSerializationContext jsonserializationcontext) { // Paper - decompile fix
             return this.a((LotoSelectorEntry) object, type, jsonserializationcontext);
         }
 
-        public Object deserialize(JsonElement jsonelement, Type type, JsonDeserializationContext jsondeserializationcontext) throws JsonParseException {
+        public LotoSelectorEntry deserialize(JsonElement jsonelement, Type type, JsonDeserializationContext jsondeserializationcontext) throws JsonParseException { // Paper - decompile fix
             return this.a(jsonelement, type, jsondeserializationcontext);
         }
     }
diff --git a/src/main/java/net/minecraft/server/MCUtil.java b/src/main/java/net/minecraft/server/MCUtil.java
new file mode 100644
index 0000000000..70cdc3f102
--- /dev/null
+++ b/src/main/java/net/minecraft/server/MCUtil.java
@@ -0,0 +1,292 @@
+package net.minecraft.server;
+
+import com.google.common.util.concurrent.ThreadFactoryBuilder;
+import org.bukkit.Location;
+import org.bukkit.craftbukkit.util.Waitable;
+import org.spigotmc.AsyncCatcher;
+
+import javax.annotation.Nullable;
+import java.util.Queue;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.Executor;
+import java.util.concurrent.Executors;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.TimeoutException;
+import java.util.function.Supplier;
+import java.util.regex.Pattern;
+
+public final class MCUtil {
+    private static final Executor asyncExecutor = Executors.newSingleThreadExecutor(new ThreadFactoryBuilder().setNameFormat("Paper Async Task Handler Thread - %1$d").build());
+
+    private MCUtil() {}
+
+
+    public static boolean isMainThread() {
+        return MinecraftServer.getServer().isMainThread();
+    }
+
+    private static class DelayedRunnable implements Runnable {
+
+        private final int ticks;
+        private final Runnable run;
+
+        private DelayedRunnable(int ticks, Runnable run) {
+            this.ticks = ticks;
+            this.run = run;
+        }
+
+        @Override
+        public void run() {
+            if (ticks <= 0) {
+                run.run();
+            } else {
+                scheduleTask(ticks-1, run);
+            }
+        }
+    }
+
+    public static void scheduleTask(int ticks, Runnable runnable) {
+        // We use post to main instead of process queue as we don't want to process these mid tick if
+        // Someone uses processQueueWhileWaiting
+        MinecraftServer.getServer().postToMainThread(new DelayedRunnable(ticks, runnable));
+    }
+
+    public static void processQueue() {
+        Runnable runnable;
+        Queue<Runnable> processQueue = getProcessQueue();
+        while ((runnable = processQueue.poll()) != null) {
+            try {
+                runnable.run();
+            } catch (Exception e) {
+                MinecraftServer.LOGGER.error("Error executing task", e);
+            }
+        }
+    }
+    public static <T> T processQueueWhileWaiting(CompletableFuture <T> future) {
+        try {
+            if (isMainThread()) {
+                while (!future.isDone()) {
+                    try {
+                        return future.get(1, TimeUnit.MILLISECONDS);
+                    } catch (TimeoutException ignored) {
+                        processQueue();
+                    }
+                }
+            }
+            return future.get();
+        } catch (Exception e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    public static void ensureMain(Runnable run) {
+        ensureMain(null, run);
+    }
+    /**
+     * Ensures the target code is running on the main thread
+     * @param reason
+     * @param run
+     * @return
+     */
+    public static void ensureMain(String reason, Runnable run) {
+        if (AsyncCatcher.enabled && Thread.currentThread() != MinecraftServer.getServer().primaryThread) {
+            if (reason != null) {
+                new IllegalStateException("Asynchronous " + reason + "!").printStackTrace();
+            }
+            getProcessQueue().add(run);
+            return;
+        }
+        run.run();
+    }
+
+    private static Queue<Runnable> getProcessQueue() {
+        return MinecraftServer.getServer().processQueue;
+    }
+
+    public static <T> T ensureMain(Supplier<T> run) {
+        return ensureMain(null, run);
+    }
+    /**
+     * Ensures the target code is running on the main thread
+     * @param reason
+     * @param run
+     * @param <T>
+     * @return
+     */
+    public static <T> T ensureMain(String reason, Supplier<T> run) {
+        if (AsyncCatcher.enabled && Thread.currentThread() != MinecraftServer.getServer().primaryThread) {
+            if (reason != null) {
+                new IllegalStateException("Asynchronous " + reason + "! Blocking thread until it returns ").printStackTrace();
+            }
+            Waitable<T> wait = new Waitable<T>() {
+                @Override
+                protected T evaluate() {
+                    return run.get();
+                }
+            };
+            getProcessQueue().add(wait);
+            try {
+                return wait.get();
+            } catch (InterruptedException | ExecutionException e) {
+                e.printStackTrace();
+            }
+            return null;
+        }
+        return run.get();
+    }
+
+    /**
+     * Calculates distance between 2 entities
+     * @param e1
+     * @param e2
+     * @return
+     */
+    public static double distance(Entity e1, Entity e2) {
+        return Math.sqrt(distanceSq(e1, e2));
+    }
+
+
+    /**
+     * Calculates distance between 2 block positions
+     * @param e1
+     * @param e2
+     * @return
+     */
+    public static double distance(BlockPosition e1, BlockPosition e2) {
+        return Math.sqrt(distanceSq(e1, e2));
+    }
+
+    /**
+     * Gets the distance between 2 positions
+     * @param x1
+     * @param y1
+     * @param z1
+     * @param x2
+     * @param y2
+     * @param z2
+     * @return
+     */
+    public static double distance(double x1, double y1, double z1, double x2, double y2, double z2) {
+        return Math.sqrt(distanceSq(x1, y1, z1, x2, y2, z2));
+    }
+
+    /**
+     * Get's the distance squared between 2 entities
+     * @param e1
+     * @param e2
+     * @return
+     */
+    public static double distanceSq(Entity e1, Entity e2) {
+        return distanceSq(e1.locX,e1.locY,e1.locZ, e2.locX,e2.locY,e2.locZ);
+    }
+
+    /**
+     * Gets the distance sqaured between 2 block positions
+     * @param pos1
+     * @param pos2
+     * @return
+     */
+    public static double distanceSq(BlockPosition pos1, BlockPosition pos2) {
+        return distanceSq(pos1.getX(), pos1.getY(), pos1.getZ(), pos2.getX(), pos2.getY(), pos2.getZ());
+    }
+
+    /**
+     * Gets the distance squared between 2 positions
+     * @param x1
+     * @param y1
+     * @param z1
+     * @param x2
+     * @param y2
+     * @param z2
+     * @return
+     */
+    public static double distanceSq(double x1, double y1, double z1, double x2, double y2, double z2) {
+        return (x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2) + (z1 - z2) * (z1 - z2);
+    }
+
+    /**
+     * Converts a NMS World/BlockPosition to Bukkit Location
+     * @param world
+     * @param x
+     * @param y
+     * @param z
+     * @return
+     */
+    public static Location toLocation(World world, double x, double y, double z) {
+        return new Location(world.getWorld(), x, y, z);
+    }
+
+    /**
+     * Converts a NMS World/BlockPosition to Bukkit Location
+     * @param world
+     * @param pos
+     * @return
+     */
+    public static Location toLocation(World world, BlockPosition pos) {
+        return new Location(world.getWorld(), pos.getX(), pos.getY(), pos.getZ());
+    }
+
+    /**
+     * Converts an NMS entity's current location to a Bukkit Location
+     * @param entity
+     * @return
+     */
+    public static Location toLocation(Entity entity) {
+        return new Location(entity.getWorld().getWorld(), entity.locX, entity.locY, entity.locZ);
+    }
+
+    public static BlockPosition toBlockPosition(Location loc) {
+        return new BlockPosition(loc.getBlockX(), loc.getBlockY(), loc.getBlockZ());
+    }
+
+    public static boolean isEdgeOfChunk(BlockPosition pos) {
+        final int modX = pos.getX() & 15;
+        final int modZ = pos.getZ() & 15;
+        return (modX == 0 || modX == 15 || modZ == 0 || modZ == 15);
+    }
+
+    /**
+     * Gets a chunk without changing its boolean for should unload
+     * @param world
+     * @param x
+     * @param z
+     * @return
+     */
+    @Nullable
+    public static Chunk getLoadedChunkWithoutMarkingActive(World world, int x, int z) {
+        return ((ChunkProviderServer) world.chunkProvider).chunks.get(ChunkCoordIntPair.a(x, z));
+    }
+
+    /**
+     * Gets a chunk without changing its boolean for should unload
+     * @param provider
+     * @param x
+     * @param z
+     * @return
+     */
+    @Nullable
+    public static Chunk getLoadedChunkWithoutMarkingActive(IChunkProvider provider, int x, int z) {
+        return ((ChunkProviderServer)provider).chunks.get(ChunkCoordIntPair.a(x, z));
+    }
+
+    /**
+     * Posts a task to be executed asynchronously
+     * @param run
+     */
+    public static void scheduleAsyncTask(Runnable run) {
+        asyncExecutor.execute(run);
+    }
+
+    @Nullable
+    public static TileEntityHopper getHopper(World world, BlockPosition pos) {
+        Chunk chunk = world.getChunkIfLoaded(pos.getX() >> 4, pos.getZ() >> 4);
+        if (chunk != null && chunk.getBlockData(pos).getBlock() == Blocks.HOPPER) {
+            TileEntity tileEntity = chunk.getTileEntityImmediately(pos);
+            if (tileEntity instanceof TileEntityHopper) {
+                return (TileEntityHopper) tileEntity;
+            }
+        }
+        return null;
+    }
+}
diff --git a/src/main/java/net/minecraft/server/NBTBase.java b/src/main/java/net/minecraft/server/NBTBase.java
index 8170a84280..e21e60b003 100644
--- a/src/main/java/net/minecraft/server/NBTBase.java
+++ b/src/main/java/net/minecraft/server/NBTBase.java
@@ -20,7 +20,7 @@ public interface NBTBase {
 
     byte getTypeId();
 
-    static default NBTBase createTag(byte b0) {
+    static NBTBase createTag(byte b0) { // Paper - decompile fix
         switch (b0) {
         case 0:
             return new NBTTagEnd();
@@ -66,7 +66,7 @@ public interface NBTBase {
         }
     }
 
-    static default String n(int i) {
+    static String n(int i) { // Paper - decompile fix
         switch (i) {
         case 0:
             return "TAG_End";
diff --git a/src/main/java/net/minecraft/server/NBTList.java b/src/main/java/net/minecraft/server/NBTList.java
index 1a81d8e5f6..057c2077a0 100644
--- a/src/main/java/net/minecraft/server/NBTList.java
+++ b/src/main/java/net/minecraft/server/NBTList.java
@@ -13,7 +13,7 @@ public abstract class NBTList<T extends NBTBase> extends AbstractList<T> impleme
     }
 
     public T set(int i, T t0) {
-        NBTBase nbtbase = this.get(i);
+        T nbtbase = this.get(i); // Paper - decompile fix
 
         this.a(i, t0);
         return nbtbase;
@@ -25,11 +25,5 @@ public abstract class NBTList<T extends NBTBase> extends AbstractList<T> impleme
 
     public abstract void b(int i);
 
-    public Object set(int i, Object object) {
-        return this.set(i, (NBTBase) object);
-    }
-
-    public Object get(int i) {
-        return this.get(i);
-    }
+    public abstract NBTList<T> clone(); // Paper - decompile fix
 }
diff --git a/src/main/java/net/minecraft/server/NBTTagByteArray.java b/src/main/java/net/minecraft/server/NBTTagByteArray.java
index 11ffa6c342..3ff3a29835 100644
--- a/src/main/java/net/minecraft/server/NBTTagByteArray.java
+++ b/src/main/java/net/minecraft/server/NBTTagByteArray.java
@@ -66,7 +66,8 @@ public class NBTTagByteArray extends NBTList<NBTTagByte> {
         return stringbuilder.append(']').toString();
     }
 
-    public NBTBase clone() {
+    @Override
+    public NBTTagByteArray clone() {
         byte[] abyte = new byte[this.data.length];
 
         System.arraycopy(this.data, 0, abyte, 0, this.data.length);
diff --git a/src/main/java/net/minecraft/server/NBTTagCompound.java b/src/main/java/net/minecraft/server/NBTTagCompound.java
index 7fc9b5ff32..e658816c24 100644
--- a/src/main/java/net/minecraft/server/NBTTagCompound.java
+++ b/src/main/java/net/minecraft/server/NBTTagCompound.java
@@ -24,7 +24,7 @@ public class NBTTagCompound implements NBTBase {
 
     private static final Logger f = LogManager.getLogger();
     private static final Pattern g = Pattern.compile("[A-Za-z0-9._+-]+");
-    private final Map<String, NBTBase> map = Maps.newHashMap();
+    public final Map<String, NBTBase> map = Maps.newHashMap(); // Paper
 
     public NBTTagCompound() {}
 
@@ -96,11 +96,13 @@ public class NBTTagCompound implements NBTBase {
         this.map.put(s, new NBTTagLong(i));
     }
 
+    public void setUUID(String prefix, UUID uuid) { a(prefix, uuid); } // Paper - OBFHELPER
     public void a(String s, UUID uuid) {
         this.setLong(s + "Most", uuid.getMostSignificantBits());
         this.setLong(s + "Least", uuid.getLeastSignificantBits());
     }
 
+    public UUID getUUID(String prefix) { return a(prefix); } // Paper - OBFHELPER
     @Nullable
     public UUID a(String s) {
         return new UUID(this.getLong(s + "Most"), this.getLong(s + "Least"));
@@ -492,8 +494,4 @@ public class NBTTagCompound implements NBTBase {
             return chatcomponenttext;
         }
     }
-
-    public NBTBase clone() {
-        return this.clone();
-    }
 }
diff --git a/src/main/java/net/minecraft/server/NBTTagIntArray.java b/src/main/java/net/minecraft/server/NBTTagIntArray.java
index f5c9b97d5c..d121ad4f7a 100644
--- a/src/main/java/net/minecraft/server/NBTTagIntArray.java
+++ b/src/main/java/net/minecraft/server/NBTTagIntArray.java
@@ -132,7 +132,7 @@ public class NBTTagIntArray extends NBTList<NBTTagInt> {
         return this.a(i);
     }
 
-    public NBTBase clone() {
+    public NBTTagIntArray clone() { // Paper - decompile fix
         return this.c();
     }
 }
diff --git a/src/main/java/net/minecraft/server/NBTTagList.java b/src/main/java/net/minecraft/server/NBTTagList.java
index b3c944d701..a8280acf94 100644
--- a/src/main/java/net/minecraft/server/NBTTagList.java
+++ b/src/main/java/net/minecraft/server/NBTTagList.java
@@ -14,7 +14,7 @@ import org.apache.logging.log4j.Logger;
 public class NBTTagList extends NBTList<NBTBase> {
 
     private static final Logger f = LogManager.getLogger();
-    private List<NBTBase> list = Lists.newArrayList();
+    public List<NBTBase> list = Lists.newArrayList(); // Paper
     private byte type = 0;
 
     public NBTTagList() {}
@@ -294,23 +294,7 @@ public class NBTTagList extends NBTList<NBTBase> {
         return this.type;
     }
 
-    public NBTBase clone() {
+    public NBTTagList clone() {
         return this.c();
     }
-
-    public Object remove(int i) {
-        return this.remove(i);
-    }
-
-    public Object set(int i, Object object) {
-        return this.set(i, (NBTBase) object);
-    }
-
-    public Object get(int i) {
-        return this.get(i);
-    }
-
-    public boolean add(Object object) {
-        return this.add((NBTBase) object);
-    }
 }
diff --git a/src/main/java/net/minecraft/server/PlayerConnection.java b/src/main/java/net/minecraft/server/PlayerConnection.java
index 0618962e75..42e0630e60 100644
--- a/src/main/java/net/minecraft/server/PlayerConnection.java
+++ b/src/main/java/net/minecraft/server/PlayerConnection.java
@@ -66,9 +66,9 @@ public class PlayerConnection implements PacketListenerPlayIn, ITickable {
     private final MinecraftServer minecraftServer;
     public EntityPlayer player;
     private int e;
-    private long f;
-    private boolean g;
-    private long h;
+    private long f; private void setLastPing(long lastPing) { this.f = lastPing;}; private long getLastPing() { return this.f;}; // Paper - OBFHELPER
+    private boolean g; private void setPendingPing(boolean isPending) { this.g = isPending;}; private boolean isPendingPing() { return this.g;}; // Paper - OBFHELPER
+    private long h; private void setKeepAliveID(long keepAliveID) { this.h = keepAliveID;}; private long getKeepAliveID() {return this.h; };  // Paper - OBFHELPER
     // CraftBukkit start - multithreaded fields
     private volatile int chatThrottle;
     private static final AtomicIntegerFieldUpdater chatSpamField = AtomicIntegerFieldUpdater.newUpdater(PlayerConnection.class, "chatThrottle");
diff --git a/src/main/java/net/minecraft/server/RegistryBlockID.java b/src/main/java/net/minecraft/server/RegistryBlockID.java
index ef332d6517..7cc7eb7735 100644
--- a/src/main/java/net/minecraft/server/RegistryBlockID.java
+++ b/src/main/java/net/minecraft/server/RegistryBlockID.java
@@ -8,7 +8,7 @@ import java.util.Iterator;
 import java.util.List;
 import javax.annotation.Nullable;
 
-public class RegistryBlockID<T> implements Registry<T> {
+public class RegistryBlockID<T> implements Registry { // Paper - decompile fix
 
     private int a;
     private final IdentityHashMap<T, Integer> b;
@@ -27,7 +27,7 @@ public class RegistryBlockID<T> implements Registry<T> {
         this.b.put(t0, Integer.valueOf(i));
 
         while (this.c.size() <= i) {
-            this.c.add((Object) null);
+            this.c.add(null); // Paper - decompile fix
         }
 
         this.c.set(i, t0);
diff --git a/src/main/java/net/minecraft/server/ServerPing.java b/src/main/java/net/minecraft/server/ServerPing.java
index 2179664a0c..d7e1ecc031 100644
--- a/src/main/java/net/minecraft/server/ServerPing.java
+++ b/src/main/java/net/minecraft/server/ServerPing.java
@@ -102,11 +102,11 @@ public class ServerPing {
             return jsonobject;
         }
 
-        public JsonElement serialize(Object object, Type type, JsonSerializationContext jsonserializationcontext) {
+        public JsonElement serialize(ServerPing object, Type type, JsonSerializationContext jsonserializationcontext) { // Paper - decompile fix
             return this.a((ServerPing) object, type, jsonserializationcontext);
         }
 
-        public Object deserialize(JsonElement jsonelement, Type type, JsonDeserializationContext jsondeserializationcontext) throws JsonParseException {
+        public ServerPing deserialize(JsonElement jsonelement, Type type, JsonDeserializationContext jsondeserializationcontext) throws JsonParseException { // Paper - decompile fix
             return this.a(jsonelement, type, jsondeserializationcontext);
         }
     }
@@ -147,11 +147,11 @@ public class ServerPing {
                 return jsonobject;
             }
 
-            public JsonElement serialize(Object object, Type type, JsonSerializationContext jsonserializationcontext) {
+            public JsonElement serialize(ServerPing.ServerData object, Type type, JsonSerializationContext jsonserializationcontext) { // Paper - decompile fix
                 return this.a((ServerPing.ServerData) object, type, jsonserializationcontext);
             }
 
-            public Object deserialize(JsonElement jsonelement, Type type, JsonDeserializationContext jsondeserializationcontext) throws JsonParseException {
+            public ServerPing.ServerData deserialize(JsonElement jsonelement, Type type, JsonDeserializationContext jsondeserializationcontext) throws JsonParseException { // Paper - decompile fix
                 return this.a(jsonelement, type, jsondeserializationcontext);
             }
         }
@@ -235,11 +235,11 @@ public class ServerPing {
                 return jsonobject;
             }
 
-            public JsonElement serialize(Object object, Type type, JsonSerializationContext jsonserializationcontext) {
+            public JsonElement serialize(ServerPing.ServerPingPlayerSample object, Type type, JsonSerializationContext jsonserializationcontext) { // Paper - decompile fix
                 return this.a((ServerPing.ServerPingPlayerSample) object, type, jsonserializationcontext);
             }
 
-            public Object deserialize(JsonElement jsonelement, Type type, JsonDeserializationContext jsondeserializationcontext) throws JsonParseException {
+            public ServerPing.ServerPingPlayerSample deserialize(JsonElement jsonelement, Type type, JsonDeserializationContext jsondeserializationcontext) throws JsonParseException { // Paper - decompile fix
                 return this.a(jsonelement, type, jsondeserializationcontext);
             }
         }
-- 
2.18.0