PaperSpigot-Parent/CraftBukkit-Patches/0002-mc-dev-imports.patch

From 5df0962615a66779058f3ca87ea05ac17be54059 Mon Sep 17 00:00:00 2001
From: md_5 <md_5@live.com.au>
Date: Sun, 1 Dec 2013 15:10:48 +1100
Subject: [PATCH] mc-dev imports


diff --git a/src/main/java/net/minecraft/server/BlockBrewingStand.java b/src/main/java/net/minecraft/server/BlockBrewingStand.java
new file mode 100644
index 0000000..3287d77
--- /dev/null
+++ b/src/main/java/net/minecraft/server/BlockBrewingStand.java
@@ -0,0 +1,109 @@
+package net.minecraft.server;
+
+import java.util.List;
+import java.util.Random;
+
+public class BlockBrewingStand extends BlockContainer {
+
+    private Random a = new Random();
+
+    public BlockBrewingStand() {
+        super(Material.ORE);
+    }
+
+    public boolean c() {
+        return false;
+    }
+
+    public int b() {
+        return 25;
+    }
+
+    public TileEntity a(World world, int i) {
+        return new TileEntityBrewingStand();
+    }
+
+    public boolean d() {
+        return false;
+    }
+
+    public void a(World world, int i, int j, int k, AxisAlignedBB axisalignedbb, List list, Entity entity) {
+        this.a(0.4375F, 0.0F, 0.4375F, 0.5625F, 0.875F, 0.5625F);
+        super.a(world, i, j, k, axisalignedbb, list, entity);
+        this.g();
+        super.a(world, i, j, k, axisalignedbb, list, entity);
+    }
+
+    public void g() {
+        this.a(0.0F, 0.0F, 0.0F, 1.0F, 0.125F, 1.0F);
+    }
+
+    public boolean interact(World world, int i, int j, int k, EntityHuman entityhuman, int l, float f, float f1, float f2) {
+        if (world.isStatic) {
+            return true;
+        } else {
+            TileEntityBrewingStand tileentitybrewingstand = (TileEntityBrewingStand) world.getTileEntity(i, j, k);
+
+            if (tileentitybrewingstand != null) {
+                entityhuman.openBrewingStand(tileentitybrewingstand);
+            }
+
+            return true;
+        }
+    }
+
+    public void postPlace(World world, int i, int j, int k, EntityLiving entityliving, ItemStack itemstack) {
+        if (itemstack.hasName()) {
+            ((TileEntityBrewingStand) world.getTileEntity(i, j, k)).a(itemstack.getName());
+        }
+    }
+
+    public void remove(World world, int i, int j, int k, Block block, int l) {
+        TileEntity tileentity = world.getTileEntity(i, j, k);
+
+        if (tileentity instanceof TileEntityBrewingStand) {
+            TileEntityBrewingStand tileentitybrewingstand = (TileEntityBrewingStand) tileentity;
+
+            for (int i1 = 0; i1 < tileentitybrewingstand.getSize(); ++i1) {
+                ItemStack itemstack = tileentitybrewingstand.getItem(i1);
+
+                if (itemstack != null) {
+                    float f = this.a.nextFloat() * 0.8F + 0.1F;
+                    float f1 = this.a.nextFloat() * 0.8F + 0.1F;
+                    float f2 = this.a.nextFloat() * 0.8F + 0.1F;
+
+                    while (itemstack.count > 0) {
+                        int j1 = this.a.nextInt(21) + 10;
+
+                        if (j1 > itemstack.count) {
+                            j1 = itemstack.count;
+                        }
+
+                        itemstack.count -= j1;
+                        EntityItem entityitem = new EntityItem(world, (double) ((float) i + f), (double) ((float) j + f1), (double) ((float) k + f2), new ItemStack(itemstack.getItem(), j1, itemstack.getData()));
+                        float f3 = 0.05F;
+
+                        entityitem.motX = (double) ((float) this.a.nextGaussian() * f3);
+                        entityitem.motY = (double) ((float) this.a.nextGaussian() * f3 + 0.2F);
+                        entityitem.motZ = (double) ((float) this.a.nextGaussian() * f3);
+                        world.addEntity(entityitem);
+                    }
+                }
+            }
+        }
+
+        super.remove(world, i, j, k, block, l);
+    }
+
+    public Item getDropType(int i, Random random, int j) {
+        return Items.BREWING_STAND;
+    }
+
+    public boolean M() {
+        return true;
+    }
+
+    public int g(World world, int i, int j, int k, int l) {
+        return Container.b((IInventory) world.getTileEntity(i, j, k));
+    }
+}
diff --git a/src/main/java/net/minecraft/server/BlockTNT.java b/src/main/java/net/minecraft/server/BlockTNT.java
new file mode 100644
index 0000000..6d5090b
--- /dev/null
+++ b/src/main/java/net/minecraft/server/BlockTNT.java
@@ -0,0 +1,80 @@
+package net.minecraft.server;
+
+import java.util.Random;
+
+public class BlockTNT extends Block {
+
+    public BlockTNT() {
+        super(Material.TNT);
+        this.a(CreativeModeTab.d);
+    }
+
+    public void onPlace(World world, int i, int j, int k) {
+        super.onPlace(world, i, j, k);
+        if (world.isBlockIndirectlyPowered(i, j, k)) {
+            this.postBreak(world, i, j, k, 1);
+            world.setAir(i, j, k);
+        }
+    }
+
+    public void doPhysics(World world, int i, int j, int k, Block block) {
+        if (world.isBlockIndirectlyPowered(i, j, k)) {
+            this.postBreak(world, i, j, k, 1);
+            world.setAir(i, j, k);
+        }
+    }
+
+    public int a(Random random) {
+        return 1;
+    }
+
+    public void wasExploded(World world, int i, int j, int k, Explosion explosion) {
+        if (!world.isStatic) {
+            EntityTNTPrimed entitytntprimed = new EntityTNTPrimed(world, (double) ((float) i + 0.5F), (double) ((float) j + 0.5F), (double) ((float) k + 0.5F), explosion.c());
+
+            entitytntprimed.fuseTicks = world.random.nextInt(entitytntprimed.fuseTicks / 4) + entitytntprimed.fuseTicks / 8;
+            world.addEntity(entitytntprimed);
+        }
+    }
+
+    public void postBreak(World world, int i, int j, int k, int l) {
+        this.a(world, i, j, k, l, (EntityLiving) null);
+    }
+
+    public void a(World world, int i, int j, int k, int l, EntityLiving entityliving) {
+        if (!world.isStatic) {
+            if ((l & 1) == 1) {
+                EntityTNTPrimed entitytntprimed = new EntityTNTPrimed(world, (double) ((float) i + 0.5F), (double) ((float) j + 0.5F), (double) ((float) k + 0.5F), entityliving);
+
+                world.addEntity(entitytntprimed);
+                world.makeSound(entitytntprimed, "game.tnt.primed", 1.0F, 1.0F);
+            }
+        }
+    }
+
+    public boolean interact(World world, int i, int j, int k, EntityHuman entityhuman, int l, float f, float f1, float f2) {
+        if (entityhuman.bD() != null && entityhuman.bD().getItem() == Items.FLINT_AND_STEEL) {
+            this.a(world, i, j, k, 1, entityhuman);
+            world.setAir(i, j, k);
+            entityhuman.bD().damage(1, entityhuman);
+            return true;
+        } else {
+            return super.interact(world, i, j, k, entityhuman, l, f, f1, f2);
+        }
+    }
+
+    public void a(World world, int i, int j, int k, Entity entity) {
+        if (entity instanceof EntityArrow && !world.isStatic) {
+            EntityArrow entityarrow = (EntityArrow) entity;
+
+            if (entityarrow.isBurning()) {
+                this.a(world, i, j, k, 1, entityarrow.shooter instanceof EntityLiving ? (EntityLiving) entityarrow.shooter : null);
+                world.setAir(i, j, k);
+            }
+        }
+    }
+
+    public boolean a(Explosion explosion) {
+        return false;
+    }
+}
diff --git a/src/main/java/net/minecraft/server/NextTickListEntry.java b/src/main/java/net/minecraft/server/NextTickListEntry.java
new file mode 100644
index 0000000..06934a1
--- /dev/null
+++ b/src/main/java/net/minecraft/server/NextTickListEntry.java
@@ -0,0 +1,60 @@
+package net.minecraft.server;
+
+public class NextTickListEntry implements Comparable {
+
+    private static long f;
+    private final Block g;
+    public int a;
+    public int b;
+    public int c;
+    public long d;
+    public int e;
+    private long h;
+
+    public NextTickListEntry(int i, int j, int k, Block block) {
+        this.h = (long) (f++);
+        this.a = i;
+        this.b = j;
+        this.c = k;
+        this.g = block;
+    }
+
+    public boolean equals(Object object) {
+        if (!(object instanceof NextTickListEntry)) {
+            return false;
+        } else {
+            NextTickListEntry nextticklistentry = (NextTickListEntry) object;
+
+            return this.a == nextticklistentry.a && this.b == nextticklistentry.b && this.c == nextticklistentry.c && Block.a(this.g, nextticklistentry.g);
+        }
+    }
+
+    public int hashCode() {
+        return (this.a * 1024 * 1024 + this.c * 1024 + this.b) * 256;
+    }
+
+    public NextTickListEntry a(long i) {
+        this.d = i;
+        return this;
+    }
+
+    public void a(int i) {
+        this.e = i;
+    }
+
+    public int compareTo(NextTickListEntry nextticklistentry) {
+        return this.d < nextticklistentry.d ? -1 : (this.d > nextticklistentry.d ? 1 : (this.e != nextticklistentry.e ? this.e - nextticklistentry.e : (this.h < nextticklistentry.h ? -1 : (this.h > nextticklistentry.h ? 1 : 0))));
+    }
+
+    public String toString() {
+        return Block.b(this.g) + ": (" + this.a + ", " + this.b + ", " + this.c + "), " + this.d + ", " + this.e + ", " + this.h;
+    }
+
+    public Block a() {
+        return this.g;
+    }
+
+    public int compareTo(Object object) {
+        return this.compareTo((NextTickListEntry) object);
+    }
+}
diff --git a/src/main/java/net/minecraft/server/NibbleArray.java b/src/main/java/net/minecraft/server/NibbleArray.java
new file mode 100644
index 0000000..5d75a54
--- /dev/null
+++ b/src/main/java/net/minecraft/server/NibbleArray.java
@@ -0,0 +1,40 @@
+package net.minecraft.server;
+
+public class NibbleArray {
+
+    public final byte[] a;
+    private final int b;
+    private final int c;
+
+    public NibbleArray(int i, int j) {
+        this.a = new byte[i >> 1];
+        this.b = j;
+        this.c = j + 4;
+    }
+
+    public NibbleArray(byte[] abyte, int i) {
+        this.a = abyte;
+        this.b = i;
+        this.c = i + 4;
+    }
+
+    public int a(int i, int j, int k) {
+        int l = j << this.c | k << this.b | i;
+        int i1 = l >> 1;
+        int j1 = l & 1;
+
+        return j1 == 0 ? this.a[i1] & 15 : this.a[i1] >> 4 & 15;
+    }
+
+    public void a(int i, int j, int k, int l) {
+        int i1 = j << this.c | k << this.b | i;
+        int j1 = i1 >> 1;
+        int k1 = i1 & 1;
+
+        if (k1 == 0) {
+            this.a[j1] = (byte) (this.a[j1] & 240 | l & 15);
+        } else {
+            this.a[j1] = (byte) (this.a[j1] & 15 | (l & 15) << 4);
+        }
+    }
+}
diff --git a/src/main/java/net/minecraft/server/OldChunkLoader.java b/src/main/java/net/minecraft/server/OldChunkLoader.java
new file mode 100644
index 0000000..fcb9912
--- /dev/null
+++ b/src/main/java/net/minecraft/server/OldChunkLoader.java
@@ -0,0 +1,120 @@
+package net.minecraft.server;
+
+public class OldChunkLoader {
+
+    public static OldChunk a(NBTTagCompound nbttagcompound) {
+        int i = nbttagcompound.getInt("xPos");
+        int j = nbttagcompound.getInt("zPos");
+        OldChunk oldchunk = new OldChunk(i, j);
+
+        oldchunk.g = nbttagcompound.getByteArray("Blocks");
+        oldchunk.f = new OldNibbleArray(nbttagcompound.getByteArray("Data"), 7);
+        oldchunk.e = new OldNibbleArray(nbttagcompound.getByteArray("SkyLight"), 7);
+        oldchunk.d = new OldNibbleArray(nbttagcompound.getByteArray("BlockLight"), 7);
+        oldchunk.c = nbttagcompound.getByteArray("HeightMap");
+        oldchunk.b = nbttagcompound.getBoolean("TerrainPopulated");
+        oldchunk.h = nbttagcompound.getList("Entities", 10);
+        oldchunk.i = nbttagcompound.getList("TileEntities", 10);
+        oldchunk.j = nbttagcompound.getList("TileTicks", 10);
+
+        try {
+            oldchunk.a = nbttagcompound.getLong("LastUpdate");
+        } catch (ClassCastException classcastexception) {
+            oldchunk.a = (long) nbttagcompound.getInt("LastUpdate");
+        }
+
+        return oldchunk;
+    }
+
+    public static void a(OldChunk oldchunk, NBTTagCompound nbttagcompound, WorldChunkManager worldchunkmanager) {
+        nbttagcompound.setInt("xPos", oldchunk.k);
+        nbttagcompound.setInt("zPos", oldchunk.l);
+        nbttagcompound.setLong("LastUpdate", oldchunk.a);
+        int[] aint = new int[oldchunk.c.length];
+
+        for (int i = 0; i < oldchunk.c.length; ++i) {
+            aint[i] = oldchunk.c[i];
+        }
+
+        nbttagcompound.setIntArray("HeightMap", aint);
+        nbttagcompound.setBoolean("TerrainPopulated", oldchunk.b);
+        NBTTagList nbttaglist = new NBTTagList();
+
+        int j;
+
+        for (int k = 0; k < 8; ++k) {
+            boolean flag = true;
+
+            for (j = 0; j < 16 && flag; ++j) {
+                int l = 0;
+
+                while (l < 16 && flag) {
+                    int i1 = 0;
+
+                    while (true) {
+                        if (i1 < 16) {
+                            int j1 = j << 11 | i1 << 7 | l + (k << 4);
+                            byte b0 = oldchunk.g[j1];
+
+                            if (b0 == 0) {
+                                ++i1;
+                                continue;
+                            }
+
+                            flag = false;
+                        }
+
+                        ++l;
+                        break;
+                    }
+                }
+            }
+
+            if (!flag) {
+                byte[] abyte = new byte[4096];
+                NibbleArray nibblearray = new NibbleArray(abyte.length, 4);
+                NibbleArray nibblearray1 = new NibbleArray(abyte.length, 4);
+                NibbleArray nibblearray2 = new NibbleArray(abyte.length, 4);
+
+                for (int k1 = 0; k1 < 16; ++k1) {
+                    for (int l1 = 0; l1 < 16; ++l1) {
+                        for (int i2 = 0; i2 < 16; ++i2) {
+                            int j2 = k1 << 11 | i2 << 7 | l1 + (k << 4);
+                            byte b1 = oldchunk.g[j2];
+
+                            abyte[l1 << 8 | i2 << 4 | k1] = (byte) (b1 & 255);
+                            nibblearray.a(k1, l1, i2, oldchunk.f.a(k1, l1 + (k << 4), i2));
+                            nibblearray1.a(k1, l1, i2, oldchunk.e.a(k1, l1 + (k << 4), i2));
+                            nibblearray2.a(k1, l1, i2, oldchunk.d.a(k1, l1 + (k << 4), i2));
+                        }
+                    }
+                }
+
+                NBTTagCompound nbttagcompound1 = new NBTTagCompound();
+
+                nbttagcompound1.setByte("Y", (byte) (k & 255));
+                nbttagcompound1.setByteArray("Blocks", abyte);
+                nbttagcompound1.setByteArray("Data", nibblearray.a);
+                nbttagcompound1.setByteArray("SkyLight", nibblearray1.a);
+                nbttagcompound1.setByteArray("BlockLight", nibblearray2.a);
+                nbttaglist.add(nbttagcompound1);
+            }
+        }
+
+        nbttagcompound.set("Sections", nbttaglist);
+        byte[] abyte1 = new byte[256];
+
+        for (int k2 = 0; k2 < 16; ++k2) {
+            for (j = 0; j < 16; ++j) {
+                abyte1[j << 4 | k2] = (byte) (worldchunkmanager.getBiome(oldchunk.k << 4 | k2, oldchunk.l << 4 | j).id & 255);
+            }
+        }
+
+        nbttagcompound.setByteArray("Biomes", abyte1);
+        nbttagcompound.set("Entities", oldchunk.h);
+        nbttagcompound.set("TileEntities", oldchunk.i);
+        if (oldchunk.j != null) {
+            nbttagcompound.set("TileTicks", oldchunk.j);
+        }
+    }
+}
diff --git a/src/main/java/net/minecraft/server/RegionFileCache.java b/src/main/java/net/minecraft/server/RegionFileCache.java
new file mode 100644
index 0000000..900ed68
--- /dev/null
+++ b/src/main/java/net/minecraft/server/RegionFileCache.java
@@ -0,0 +1,67 @@
+package net.minecraft.server;
+
+import java.io.DataInputStream;
+import java.io.DataOutputStream;
+import java.io.File;
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.Map;
+
+public class RegionFileCache {
+
+    private static final Map a = new HashMap();
+
+    public static synchronized RegionFile a(File file1, int i, int j) {
+        File file2 = new File(file1, "region");
+        File file3 = new File(file2, "r." + (i >> 5) + "." + (j >> 5) + ".mca");
+        RegionFile regionfile = (RegionFile) a.get(file3);
+
+        if (regionfile != null) {
+            return regionfile;
+        } else {
+            if (!file2.exists()) {
+                file2.mkdirs();
+            }
+
+            if (a.size() >= 256) {
+                a();
+            }
+
+            RegionFile regionfile1 = new RegionFile(file3);
+
+            a.put(file3, regionfile1);
+            return regionfile1;
+        }
+    }
+
+    public static synchronized void a() {
+        Iterator iterator = a.values().iterator();
+
+        while (iterator.hasNext()) {
+            RegionFile regionfile = (RegionFile) iterator.next();
+
+            try {
+                if (regionfile != null) {
+                    regionfile.c();
+                }
+            } catch (IOException ioexception) {
+                ioexception.printStackTrace();
+            }
+        }
+
+        a.clear();
+    }
+
+    public static DataInputStream c(File file1, int i, int j) {
+        RegionFile regionfile = a(file1, i, j);
+
+        return regionfile.a(i & 31, j & 31);
+    }
+
+    public static DataOutputStream d(File file1, int i, int j) {
+        RegionFile regionfile = a(file1, i, j);
+
+        return regionfile.b(i & 31, j & 31);
+    }
+}
diff --git a/src/main/java/net/minecraft/server/StructureGenerator.java b/src/main/java/net/minecraft/server/StructureGenerator.java
new file mode 100644
index 0000000..1eb87ae
--- /dev/null
+++ b/src/main/java/net/minecraft/server/StructureGenerator.java
@@ -0,0 +1,217 @@
+package net.minecraft.server;
+
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+import java.util.Random;
+import java.util.concurrent.Callable;
+
+public abstract class StructureGenerator extends WorldGenBase {
+
+    private PersistentStructure e;
+    protected Map d = new HashMap();
+
+    public StructureGenerator() {}
+
+    public abstract String a();
+
+    protected final void a(World world, int i, int j, int k, int l, Block[] ablock) {
+        this.a(world);
+        if (!this.d.containsKey(Long.valueOf(ChunkCoordIntPair.a(i, j)))) {
+            this.b.nextInt();
+
+            try {
+                if (this.a(i, j)) {
+                    StructureStart structurestart = this.b(i, j);
+
+                    this.d.put(Long.valueOf(ChunkCoordIntPair.a(i, j)), structurestart);
+                    this.a(i, j, structurestart);
+                }
+            } catch (Throwable throwable) {
+                CrashReport crashreport = CrashReport.a(throwable, "Exception preparing structure feature");
+                CrashReportSystemDetails crashreportsystemdetails = crashreport.a("Feature being prepared");
+
+                crashreportsystemdetails.a("Is feature chunk", (Callable) (new CrashReportIsFeatureChunk(this, i, j)));
+                crashreportsystemdetails.a("Chunk location", String.format("%d,%d", new Object[] { Integer.valueOf(i), Integer.valueOf(j)}));
+                crashreportsystemdetails.a("Chunk pos hash", (Callable) (new CrashReportChunkPosHash(this, i, j)));
+                crashreportsystemdetails.a("Structure type", (Callable) (new CrashReportStructureType(this)));
+                throw new ReportedException(crashreport);
+            }
+        }
+    }
+
+    public boolean a(World world, Random random, int i, int j) {
+        this.a(world);
+        int k = (i << 4) + 8;
+        int l = (j << 4) + 8;
+        boolean flag = false;
+        Iterator iterator = this.d.values().iterator();
+
+        while (iterator.hasNext()) {
+            StructureStart structurestart = (StructureStart) iterator.next();
+
+            if (structurestart.d() && structurestart.a().a(k, l, k + 15, l + 15)) {
+                structurestart.a(world, random, new StructureBoundingBox(k, l, k + 15, l + 15));
+                flag = true;
+                this.a(structurestart.e(), structurestart.f(), structurestart);
+            }
+        }
+
+        return flag;
+    }
+
+    public boolean b(int i, int j, int k) {
+        this.a(this.c);
+        return this.c(i, j, k) != null;
+    }
+
+    protected StructureStart c(int i, int j, int k) {
+        Iterator iterator = this.d.values().iterator();
+
+        while (iterator.hasNext()) {
+            StructureStart structurestart = (StructureStart) iterator.next();
+
+            if (structurestart.d() && structurestart.a().a(i, k, i, k)) {
+                Iterator iterator1 = structurestart.b().iterator();
+
+                while (iterator1.hasNext()) {
+                    StructurePiece structurepiece = (StructurePiece) iterator1.next();
+
+                    if (structurepiece.c().b(i, j, k)) {
+                        return structurestart;
+                    }
+                }
+            }
+        }
+
+        return null;
+    }
+
+    public boolean d(int i, int j, int k) {
+        this.a(this.c);
+        Iterator iterator = this.d.values().iterator();
+
+        StructureStart structurestart;
+
+        do {
+            if (!iterator.hasNext()) {
+                return false;
+            }
+
+            structurestart = (StructureStart) iterator.next();
+        } while (!structurestart.d());
+
+        return structurestart.a().a(i, k, i, k);
+    }
+
+    public ChunkPosition getNearestGeneratedFeature(World world, int i, int j, int k) {
+        this.c = world;
+        this.a(world);
+        this.b.setSeed(world.getSeed());
+        long l = this.b.nextLong();
+        long i1 = this.b.nextLong();
+        long j1 = (long) (i >> 4) * l;
+        long k1 = (long) (k >> 4) * i1;
+
+        this.b.setSeed(j1 ^ k1 ^ world.getSeed());
+        this.a(world, i >> 4, k >> 4, 0, 0, (Block[]) null);
+        double d0 = Double.MAX_VALUE;
+        ChunkPosition chunkposition = null;
+        Iterator iterator = this.d.values().iterator();
+
+        ChunkPosition chunkposition1;
+        int l1;
+        int i2;
+        double d1;
+        int j2;
+
+        while (iterator.hasNext()) {
+            StructureStart structurestart = (StructureStart) iterator.next();
+
+            if (structurestart.d()) {
+                StructurePiece structurepiece = (StructurePiece) structurestart.b().get(0);
+
+                chunkposition1 = structurepiece.a();
+                i2 = chunkposition1.x - i;
+                l1 = chunkposition1.y - j;
+                j2 = chunkposition1.z - k;
+                d1 = (double) (i2 * i2 + l1 * l1 + j2 * j2);
+                if (d1 < d0) {
+                    d0 = d1;
+                    chunkposition = chunkposition1;
+                }
+            }
+        }
+
+        if (chunkposition != null) {
+            return chunkposition;
+        } else {
+            List list = this.o_();
+
+            if (list != null) {
+                ChunkPosition chunkposition2 = null;
+                Iterator iterator1 = list.iterator();
+
+                while (iterator1.hasNext()) {
+                    chunkposition1 = (ChunkPosition) iterator1.next();
+                    i2 = chunkposition1.x - i;
+                    l1 = chunkposition1.y - j;
+                    j2 = chunkposition1.z - k;
+                    d1 = (double) (i2 * i2 + l1 * l1 + j2 * j2);
+                    if (d1 < d0) {
+                        d0 = d1;
+                        chunkposition2 = chunkposition1;
+                    }
+                }
+
+                return chunkposition2;
+            } else {
+                return null;
+            }
+        }
+    }
+
+    protected List o_() {
+        return null;
+    }
+
+    private void a(World world) {
+        if (this.e == null) {
+            this.e = (PersistentStructure) world.a(PersistentStructure.class, this.a());
+            if (this.e == null) {
+                this.e = new PersistentStructure(this.a());
+                world.a(this.a(), (PersistentBase) this.e);
+            } else {
+                NBTTagCompound nbttagcompound = this.e.a();
+                Iterator iterator = nbttagcompound.c().iterator();
+
+                while (iterator.hasNext()) {
+                    String s = (String) iterator.next();
+                    NBTBase nbtbase = nbttagcompound.get(s);
+
+                    if (nbtbase.getTypeId() == 10) {
+                        NBTTagCompound nbttagcompound1 = (NBTTagCompound) nbtbase;
+
+                        if (nbttagcompound1.hasKey("ChunkX") && nbttagcompound1.hasKey("ChunkZ")) {
+                            int i = nbttagcompound1.getInt("ChunkX");
+                            int j = nbttagcompound1.getInt("ChunkZ");
+                            StructureStart structurestart = WorldGenFactory.a(nbttagcompound1, world);
+
+                            this.d.put(Long.valueOf(ChunkCoordIntPair.a(i, j)), structurestart);
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    private void a(int i, int j, StructureStart structurestart) {
+        this.e.a(structurestart.a(i, j), i, j);
+        this.e.c();
+    }
+
+    protected abstract boolean a(int i, int j);
+
+    protected abstract StructureStart b(int i, int j);
+}
-- 
1.8.3.2