uuid changes

src/main/java/net/minecraft/server/Entity.java

@@ -910,7 +910,8 @@ public abstract class Entity {
         nbttagcompound.a("Air", (short) this.airTicks);
         nbttagcompound.a("OnGround", this.onGround);
         // CraftBukkit start
-        nbttagcompound.setLong("WorldUID", this.world.worldData.getWorldUID());
+        nbttagcompound.setLong("WorldUUIDLeast", this.world.getUUID().getLeastSignificantBits());
+        nbttagcompound.setLong("WorldUUIDMost", this.world.getUUID().getMostSignificantBits());
         nbttagcompound.setLong("UUIDLeast", this.uniqueId.getLeastSignificantBits());
         nbttagcompound.setLong("UUIDMost", this.uniqueId.getMostSignificantBits());
         // CraftBukkit end
@@ -983,23 +984,17 @@ public abstract class Entity {
         org.bukkit.World bworld = null;
 
         // TODO: Remove World related checks, replaced with WorldUID.
-        if (this instanceof EntityPlayer) {
-            EntityPlayer entityPlayer = (EntityPlayer) this;
         String worldName = nbttagcompound.getString("World");
 
-            if (nbttagcompound.hasKey("WorldUID")) {
+        if (nbttagcompound.hasKey("WorldUUIDMost") && nbttagcompound.hasKey("WorldUUIDLeast")) {
-                bworld = server.getWorld(nbttagcompound.getLong("WorldUID"));
+            UUID uid = new UUID(nbttagcompound.getLong("WorldUUIDMost"), nbttagcompound.getLong("WorldUUIDLeast"));
-            } else if ("".equals(worldName)) {
+            bworld = server.getWorld(uid);
-                bworld = ((org.bukkit.craftbukkit.CraftServer) server).getServer().getWorldServer(entityPlayer.dimension).getWorld();
         } else {
             bworld = server.getWorld(worldName);
         }
-        } else {
+        if(bworld == null && this instanceof EntityPlayer) {
-            if (nbttagcompound.hasKey("WorldUID")) {
+            EntityPlayer entityPlayer = (EntityPlayer) this;
-                bworld = server.getWorld(nbttagcompound.getLong("WorldUID"));
+            bworld = ((org.bukkit.craftbukkit.CraftServer) server).getServer().getWorldServer(entityPlayer.dimension).getWorld();
-            } else {
-                bworld = server.getWorld(nbttagcompound.getString("World"));
-            }
         }
 
         this.spawnIn(bworld == null ? null : ((org.bukkit.craftbukkit.CraftWorld) bworld).getHandle());

src/main/java/net/minecraft/server/IDataManager.java

@@ -0,0 +1,26 @@
+package net.minecraft.server;
+
+import java.io.File;
+import java.util.List;
+import java.util.UUID;
+
+public interface IDataManager {
+
+    WorldData c();
+
+    void b();
+
+    IChunkLoader a(WorldProvider worldprovider);
+
+    void a(WorldData worlddata, List list);
+
+    void a(WorldData worlddata);
+
+    PlayerFileData d();
+
+    void e();
+
+    File b(String s);
+
+    UUID getUUID();
+}

src/main/java/net/minecraft/server/PlayerNBTManager.java

@@ -0,0 +1,246 @@
+package net.minecraft.server;
+
+import java.io.DataInputStream;
+import java.io.DataOutputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.util.List;
+import java.util.UUID;
+import java.util.logging.Logger;
+
+public class PlayerNBTManager implements PlayerFileData, IDataManager {
+
+    private static final Logger a = Logger.getLogger("Minecraft");
+    private final File b;
+    private final File c;
+    private final File d;
+    private final long e = System.currentTimeMillis();
+
+    public PlayerNBTManager(File file1, String s, boolean flag) {
+        this.b = new File(file1, s);
+        this.b.mkdirs();
+        this.c = new File(this.b, "players");
+        this.d = new File(this.b, "data");
+        this.d.mkdirs();
+        if (flag) {
+            this.c.mkdirs();
+        }
+
+        this.f();
+    }
+
+    private void f() {
+        try {
+            File file1 = new File(this.b, "session.lock");
+            DataOutputStream dataoutputstream = new DataOutputStream(new FileOutputStream(file1));
+
+            try {
+                dataoutputstream.writeLong(this.e);
+            } finally {
+                dataoutputstream.close();
+            }
+        } catch (IOException ioexception) {
+            ioexception.printStackTrace();
+            throw new RuntimeException("Failed to check session lock, aborting");
+        }
+    }
+
+    protected File a() {
+        return this.b;
+    }
+
+    public void b() {
+        try {
+            File file1 = new File(this.b, "session.lock");
+            DataInputStream datainputstream = new DataInputStream(new FileInputStream(file1));
+
+            try {
+                if (datainputstream.readLong() != this.e) {
+                    throw new MinecraftException("The save is being accessed from another location, aborting");
+                }
+            } finally {
+                datainputstream.close();
+            }
+        } catch (IOException ioexception) {
+            throw new MinecraftException("Failed to check session lock, aborting");
+        }
+    }
+
+    public IChunkLoader a(WorldProvider worldprovider) {
+        if (worldprovider instanceof WorldProviderHell) {
+            File file1 = new File(this.b, "DIM-1");
+
+            file1.mkdirs();
+            return new ChunkLoader(file1, true);
+        } else {
+            return new ChunkLoader(this.b, true);
+        }
+    }
+
+    public WorldData c() {
+        File file1 = new File(this.b, "level.dat");
+        NBTTagCompound nbttagcompound;
+        NBTTagCompound nbttagcompound1;
+
+        if (file1.exists()) {
+            try {
+                nbttagcompound = CompressedStreamTools.a((InputStream) (new FileInputStream(file1)));
+                nbttagcompound1 = nbttagcompound.k("Data");
+                return new WorldData(nbttagcompound1);
+            } catch (Exception exception) {
+                exception.printStackTrace();
+            }
+        }
+
+        file1 = new File(this.b, "level.dat_old");
+        if (file1.exists()) {
+            try {
+                nbttagcompound = CompressedStreamTools.a((InputStream) (new FileInputStream(file1)));
+                nbttagcompound1 = nbttagcompound.k("Data");
+                return new WorldData(nbttagcompound1);
+            } catch (Exception exception1) {
+                exception1.printStackTrace();
+            }
+        }
+
+        return null;
+    }
+
+    public void a(WorldData worlddata, List list) {
+        NBTTagCompound nbttagcompound = worlddata.a(list);
+        NBTTagCompound nbttagcompound1 = new NBTTagCompound();
+
+        nbttagcompound1.a("Data", (NBTBase) nbttagcompound);
+
+        try {
+            File file1 = new File(this.b, "level.dat_new");
+            File file2 = new File(this.b, "level.dat_old");
+            File file3 = new File(this.b, "level.dat");
+
+            CompressedStreamTools.a(nbttagcompound1, (OutputStream) (new FileOutputStream(file1)));
+            if (file2.exists()) {
+                file2.delete();
+            }
+
+            file3.renameTo(file2);
+            if (file3.exists()) {
+                file3.delete();
+            }
+
+            file1.renameTo(file3);
+            if (file1.exists()) {
+                file1.delete();
+            }
+        } catch (Exception exception) {
+            exception.printStackTrace();
+        }
+    }
+
+    public void a(WorldData worlddata) {
+        NBTTagCompound nbttagcompound = worlddata.a();
+        NBTTagCompound nbttagcompound1 = new NBTTagCompound();
+
+        nbttagcompound1.a("Data", (NBTBase) nbttagcompound);
+
+        try {
+            File file1 = new File(this.b, "level.dat_new");
+            File file2 = new File(this.b, "level.dat_old");
+            File file3 = new File(this.b, "level.dat");
+
+            CompressedStreamTools.a(nbttagcompound1, (OutputStream) (new FileOutputStream(file1)));
+            if (file2.exists()) {
+                file2.delete();
+            }
+
+            file3.renameTo(file2);
+            if (file3.exists()) {
+                file3.delete();
+            }
+
+            file1.renameTo(file3);
+            if (file1.exists()) {
+                file1.delete();
+            }
+        } catch (Exception exception) {
+            exception.printStackTrace();
+        }
+    }
+
+    public void a(EntityHuman entityhuman) {
+        try {
+            NBTTagCompound nbttagcompound = new NBTTagCompound();
+
+            entityhuman.d(nbttagcompound);
+            File file1 = new File(this.c, "_tmp_.dat");
+            File file2 = new File(this.c, entityhuman.name + ".dat");
+
+            CompressedStreamTools.a(nbttagcompound, (OutputStream) (new FileOutputStream(file1)));
+            if (file2.exists()) {
+                file2.delete();
+            }
+
+            file1.renameTo(file2);
+        } catch (Exception exception) {
+            a.warning("Failed to save player data for " + entityhuman.name);
+        }
+    }
+
+    public void b(EntityHuman entityhuman) {
+        NBTTagCompound nbttagcompound = this.a(entityhuman.name);
+
+        if (nbttagcompound != null) {
+            entityhuman.e(nbttagcompound);
+        }
+    }
+
+    public NBTTagCompound a(String s) {
+        try {
+            File file1 = new File(this.c, s + ".dat");
+
+            if (file1.exists()) {
+                return CompressedStreamTools.a((InputStream) (new FileInputStream(file1)));
+            }
+        } catch (Exception exception) {
+            a.warning("Failed to load player data for " + s);
+        }
+
+        return null;
+    }
+
+    public PlayerFileData d() {
+        return this;
+    }
+
+    public void e() {}
+
+    public File b(String s) {
+        return new File(this.d, s + ".dat");
+    }
+
+    // CraftBukkit start
+    public UUID getUUID() {
+        try {
+            File file1 = new File(this.b, "uid.dat");
+            UUID id;
+            if(!file1.exists()) {
+                DataOutputStream dos = new DataOutputStream(new FileOutputStream(file1));
+                id = UUID.randomUUID();
+                dos.writeLong(id.getMostSignificantBits());
+                dos.writeLong(id.getLeastSignificantBits());
+            }
+            else {
+                DataInputStream dis = new DataInputStream(new FileInputStream(file1));
+                id = new UUID(dis.readLong(), dis.readLong());
+            }
+            return id;
+        }
+        catch (IOException ex) {
+            return null;
+        }
+    }
+    // CraftBukkit end
+}

src/main/java/net/minecraft/server/World.java

@@ -8,6 +8,7 @@ import java.util.List;
 import java.util.Random;
 import java.util.Set;
 import java.util.TreeSet;
+import java.util.UUID;
 
 // CraftBukkit start
 import org.bukkit.Bukkit;
@@ -2407,4 +2408,9 @@ public class World implements IBlockAccess {
             ((IWorldAccess) this.u.get(j1)).a(entityhuman, i, j, k, l, i1);
         }
     }
+
+    // CraftBukkit start
+    public UUID getUUID() {
+        return this.w.getUUID();
+    }
 }

src/main/java/net/minecraft/server/WorldData.java

@@ -1,7 +1,6 @@
 package net.minecraft.server;
 
 import java.util.List;
-import org.bukkit.Bukkit;
 
 public class WorldData {
 
@@ -20,7 +19,6 @@ public class WorldData {
     private int m;
     private boolean n;
     private int o;
-    private long worldUID; // CraftBukkit
 
     public WorldData(NBTTagCompound nbttagcompound) {
         this.a = nbttagcompound.getLong("RandomSeed");
@@ -40,24 +38,11 @@ public class WorldData {
             this.h = nbttagcompound.k("Player");
             this.i = this.h.e("Dimension");
         }
-        // CraftBukkit start
-        if (nbttagcompound.hasKey("WorldUID")) {
-            this.worldUID = nbttagcompound.getLong("WorldUID");
-        } else {
-            this.worldUID = (System.nanoTime() << 20) + this.a;
-            nbttagcompound.setLong("WorldUID", this.worldUID);
-        }
-
-        if (Bukkit.getServer().getWorld(worldUID) != null) {
-            throw new IllegalStateException("World '" + name + "' contains a conflicting UID with existing world. Please edit its level.dat and remove WorldUID, or delete its level.dat (and lose its seed/etc).");
-        }
-        // CraftBukkit end
     }
 
     public WorldData(long i, String s) {
         this.a = i;
         this.name = s;
-        this.worldUID = (System.nanoTime() << 20) + this.a; // CraftBukkit
     }
 
     public WorldData(WorldData worlddata) {
@@ -120,7 +105,6 @@ public class WorldData {
         if (nbttagcompound1 != null) {
             nbttagcompound.a("Player", nbttagcompound1);
         }
-        nbttagcompound.setLong("WorldUID", this.worldUID); // CraftBukkit
     }
 
     public long getSeed() {
@@ -208,10 +192,4 @@ public class WorldData {
     public void setWeatherDuration(int i) {
         this.m = i;
     }
-
-    // CraftBukkit start
-    public long getWorldUID() {
-        return this.worldUID;
-    }
-    // CraftBukkit end
 }

src/main/java/net/minecraft/server/WorldMap.java

@@ -4,6 +4,7 @@ import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.UUID;
 
 // CraftBukkit start
 import org.bukkit.Bukkit;
@@ -25,7 +26,7 @@ public class WorldMap extends WorldMapBase {
 
     // CraftBukkit start
     private CraftServer server;
-    private long worldUID = 0L;
+    private UUID uniqueId = null;
     // CraftBukkit end
 
     public WorldMap(String s) {
@@ -38,8 +39,13 @@ public class WorldMap extends WorldMapBase {
         byte dimension = nbttagcompound.c("dimension");
 
         if (dimension >= 10) {
-            this.worldUID = nbttagcompound.getLong("WorldUID");
+            long least = nbttagcompound.getLong("UUIDLeast");
-            CraftWorld world = (CraftWorld) server.getWorld(this.worldUID);
+            long most = nbttagcompound.getLong("UUIDMost");
+
+            if (least != 0L && most != 0L) {
+                this.uniqueId = new UUID(most, least);
+            }
+            CraftWorld world = (CraftWorld) server.getWorld(this.uniqueId);
             // Check if the stored world details are correct.
             if (world == null) {
                 /* All Maps which do not have their valid world loaded are set to a dimension which hopefully won't be reached.
@@ -94,16 +100,17 @@ public class WorldMap extends WorldMapBase {
     public void b(NBTTagCompound nbttagcompound) {
         // CraftBukkit start
         if (this.map >= 10) {
-            if (this.worldUID == 0L) {
+            if (this.uniqueId == null) {
                 for (org.bukkit.World world : server.getWorlds()) {
                     CraftWorld cWorld = (CraftWorld) world;
                     if (cWorld.getHandle().dimension == this.map) {
-                        this.worldUID = cWorld.getUID();
+                        this.uniqueId = cWorld.getUID();
                         break;
                     }
                 }
             }
-            nbttagcompound.setLong("WorldUID", this.worldUID);
+            nbttagcompound.setLong("UUIDLeast", this.uniqueId.getLeastSignificantBits());
+            nbttagcompound.setLong("UUIDMost", this.uniqueId.getMostSignificantBits());
         }
         // CraftBukkit end
         nbttagcompound.a("dimension", this.map);

src/main/java/org/bukkit/craftbukkit/CraftServer.java

@@ -24,6 +24,7 @@ import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.Random;
+import java.util.UUID;
 import java.util.logging.Level;
 import java.util.logging.Logger;
 import jline.ConsoleReader;
@@ -494,9 +495,9 @@ public final class CraftServer implements Server {
         return worlds.get(name.toLowerCase());
     }
 
-    public World getWorld(long uid) {
+    public World getWorld(UUID uid) {
         for (World world : worlds.values()) {
-            if (world.getUID() == uid) {
+            if (world.getUID().equals(uid)) {
                 return world;
             }
         }

src/main/java/org/bukkit/craftbukkit/CraftWorld.java

@@ -8,6 +8,8 @@ import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Random;
+import java.util.UUID;
+
 import net.minecraft.server.*;
 
 import org.bukkit.entity.Arrow;
@@ -400,8 +402,8 @@ public class CraftWorld implements World {
         return world.worldData.getSeed();
     }
 
-    public long getUID() {
+    public UUID getUID() {
-        return world.worldData.getWorldUID();
+        return world.getUUID();
     }
 
     @Override