001 package net.minecraft.src;
002
003 import java.io.DataInputStream;
004 import java.io.DataOutputStream;
005 import java.io.File;
006 import java.io.IOException;
007 import java.util.ArrayList;
008 import java.util.HashSet;
009 import java.util.Iterator;
010 import java.util.List;
011 import java.util.Set;
012 import java.util.logging.Level;
013
014 import cpw.mods.fml.common.FMLLog;
015
016 import net.minecraftforge.common.MinecraftForge;
017 import net.minecraftforge.event.world.ChunkDataEvent;
018
019 public class AnvilChunkLoader implements IThreadedFileIO, IChunkLoader
020 {
021 private List chunksToRemove = new ArrayList();
022 private Set pendingAnvilChunksCoordinates = new HashSet();
023 private Object syncLockObject = new Object();
024
025 /** Save directory for chunks using the Anvil format */
026 final File chunkSaveLocation;
027
028 public AnvilChunkLoader(File par1File)
029 {
030 this.chunkSaveLocation = par1File;
031 }
032
033 /**
034 * Loads the specified(XZ) chunk into the specified world.
035 */
036 public Chunk loadChunk(World par1World, int par2, int par3) throws IOException
037 {
038 NBTTagCompound var4 = null;
039 ChunkCoordIntPair var5 = new ChunkCoordIntPair(par2, par3);
040 Object var6 = this.syncLockObject;
041
042 synchronized (this.syncLockObject)
043 {
044 if (this.pendingAnvilChunksCoordinates.contains(var5))
045 {
046 Iterator var7 = this.chunksToRemove.iterator();
047
048 while (var7.hasNext())
049 {
050 AnvilChunkLoaderPending var8 = (AnvilChunkLoaderPending)var7.next();
051
052 if (var8.chunkCoordinate.equals(var5))
053 {
054 var4 = var8.nbtTags;
055 break;
056 }
057 }
058 }
059 }
060
061 if (var4 == null)
062 {
063 DataInputStream var11 = RegionFileCache.getChunkInputStream(this.chunkSaveLocation, par2, par3);
064
065 if (var11 == null)
066 {
067 return null;
068 }
069
070 var4 = CompressedStreamTools.read(var11);
071 }
072
073 return this.checkedReadChunkFromNBT(par1World, par2, par3, var4);
074 }
075
076 /**
077 * Wraps readChunkFromNBT. Checks the coordinates and several NBT tags.
078 */
079 protected Chunk checkedReadChunkFromNBT(World par1World, int par2, int par3, NBTTagCompound par4NBTTagCompound)
080 {
081 if (!par4NBTTagCompound.hasKey("Level"))
082 {
083 System.out.println("Chunk file at " + par2 + "," + par3 + " is missing level data, skipping");
084 return null;
085 }
086 else if (!par4NBTTagCompound.getCompoundTag("Level").hasKey("Sections"))
087 {
088 System.out.println("Chunk file at " + par2 + "," + par3 + " is missing block data, skipping");
089 return null;
090 }
091 else
092 {
093 Chunk var5 = this.readChunkFromNBT(par1World, par4NBTTagCompound.getCompoundTag("Level"));
094
095 if (!var5.isAtLocation(par2, par3))
096 {
097 System.out.println("Chunk file at " + par2 + "," + par3 + " is in the wrong location; relocating. (Expected " + par2 + ", " + par3 + ", got " + var5.xPosition + ", " + var5.zPosition + ")");
098 par4NBTTagCompound.setInteger("xPos", par2);
099 par4NBTTagCompound.setInteger("zPos", par3);
100 var5 = this.readChunkFromNBT(par1World, par4NBTTagCompound.getCompoundTag("Level"));
101 }
102
103 MinecraftForge.EVENT_BUS.post(new ChunkDataEvent.Load(var5, par4NBTTagCompound));
104 return var5;
105 }
106 }
107
108 public void saveChunk(World par1World, Chunk par2Chunk) throws MinecraftException, IOException
109 {
110 par1World.checkSessionLock();
111
112 try
113 {
114 NBTTagCompound var3 = new NBTTagCompound();
115 NBTTagCompound var4 = new NBTTagCompound();
116 var3.setTag("Level", var4);
117 this.writeChunkToNBT(par2Chunk, par1World, var4);
118 this.func_75824_a(par2Chunk.getChunkCoordIntPair(), var3);
119 MinecraftForge.EVENT_BUS.post(new ChunkDataEvent.Save(par2Chunk, var3));
120 }
121 catch (Exception var5)
122 {
123 var5.printStackTrace();
124 }
125 }
126
127 protected void func_75824_a(ChunkCoordIntPair par1ChunkCoordIntPair, NBTTagCompound par2NBTTagCompound)
128 {
129 Object var3 = this.syncLockObject;
130
131 synchronized (this.syncLockObject)
132 {
133 if (this.pendingAnvilChunksCoordinates.contains(par1ChunkCoordIntPair))
134 {
135 for (int var4 = 0; var4 < this.chunksToRemove.size(); ++var4)
136 {
137 if (((AnvilChunkLoaderPending)this.chunksToRemove.get(var4)).chunkCoordinate.equals(par1ChunkCoordIntPair))
138 {
139 this.chunksToRemove.set(var4, new AnvilChunkLoaderPending(par1ChunkCoordIntPair, par2NBTTagCompound));
140 return;
141 }
142 }
143 }
144
145 this.chunksToRemove.add(new AnvilChunkLoaderPending(par1ChunkCoordIntPair, par2NBTTagCompound));
146 this.pendingAnvilChunksCoordinates.add(par1ChunkCoordIntPair);
147 ThreadedFileIOBase.threadedIOInstance.queueIO(this);
148 }
149 }
150
151 /**
152 * Returns a boolean stating if the write was unsuccessful.
153 */
154 public boolean writeNextIO()
155 {
156 AnvilChunkLoaderPending var1 = null;
157 Object var2 = this.syncLockObject;
158
159 synchronized (this.syncLockObject)
160 {
161 if (this.chunksToRemove.isEmpty())
162 {
163 return false;
164 }
165
166 var1 = (AnvilChunkLoaderPending)this.chunksToRemove.remove(0);
167 this.pendingAnvilChunksCoordinates.remove(var1.chunkCoordinate);
168 }
169
170 if (var1 != null)
171 {
172 try
173 {
174 this.writeChunkNBTTags(var1);
175 }
176 catch (Exception var4)
177 {
178 var4.printStackTrace();
179 }
180 }
181
182 return true;
183 }
184
185 private void writeChunkNBTTags(AnvilChunkLoaderPending par1AnvilChunkLoaderPending) throws IOException
186 {
187 DataOutputStream var2 = RegionFileCache.getChunkOutputStream(this.chunkSaveLocation, par1AnvilChunkLoaderPending.chunkCoordinate.chunkXPos, par1AnvilChunkLoaderPending.chunkCoordinate.chunkZPos);
188 CompressedStreamTools.write(par1AnvilChunkLoaderPending.nbtTags, var2);
189 var2.close();
190 }
191
192 /**
193 * Save extra data associated with this Chunk not normally saved during autosave, only during chunk unload.
194 * Currently unused.
195 */
196 public void saveExtraChunkData(World par1World, Chunk par2Chunk) {}
197
198 /**
199 * Called every World.tick()
200 */
201 public void chunkTick() {}
202
203 /**
204 * Save extra data not associated with any Chunk. Not saved during autosave, only during world unload. Currently
205 * unused.
206 */
207 public void saveExtraData() {}
208
209 /**
210 * Writes the Chunk passed as an argument to the NBTTagCompound also passed, using the World argument to retrieve
211 * the Chunk's last update time.
212 */
213 private void writeChunkToNBT(Chunk par1Chunk, World par2World, NBTTagCompound par3NBTTagCompound)
214 {
215 par3NBTTagCompound.setInteger("xPos", par1Chunk.xPosition);
216 par3NBTTagCompound.setInteger("zPos", par1Chunk.zPosition);
217 par3NBTTagCompound.setLong("LastUpdate", par2World.getTotalWorldTime());
218 par3NBTTagCompound.setIntArray("HeightMap", par1Chunk.heightMap);
219 par3NBTTagCompound.setBoolean("TerrainPopulated", par1Chunk.isTerrainPopulated);
220 ExtendedBlockStorage[] var4 = par1Chunk.getBlockStorageArray();
221 NBTTagList var5 = new NBTTagList("Sections");
222 ExtendedBlockStorage[] var6 = var4;
223 int var7 = var4.length;
224 NBTTagCompound var10;
225
226 for (int var8 = 0; var8 < var7; ++var8)
227 {
228 ExtendedBlockStorage var9 = var6[var8];
229
230 if (var9 != null)
231 {
232 var10 = new NBTTagCompound();
233 var10.setByte("Y", (byte)(var9.getYLocation() >> 4 & 255));
234 var10.setByteArray("Blocks", var9.getBlockLSBArray());
235
236 if (var9.getBlockMSBArray() != null)
237 {
238 var10.setByteArray("Add", var9.getBlockMSBArray().data);
239 }
240
241 var10.setByteArray("Data", var9.getMetadataArray().data);
242 var10.setByteArray("SkyLight", var9.getSkylightArray().data);
243 var10.setByteArray("BlockLight", var9.getBlocklightArray().data);
244 var5.appendTag(var10);
245 }
246 }
247
248 par3NBTTagCompound.setTag("Sections", var5);
249 par3NBTTagCompound.setByteArray("Biomes", par1Chunk.getBiomeArray());
250 par1Chunk.hasEntities = false;
251 NBTTagList var15 = new NBTTagList();
252 Iterator var17;
253
254 for (var7 = 0; var7 < par1Chunk.entityLists.length; ++var7)
255 {
256 var17 = par1Chunk.entityLists[var7].iterator();
257
258 while (var17.hasNext())
259 {
260 Entity var19 = (Entity)var17.next();
261 par1Chunk.hasEntities = true;
262 var10 = new NBTTagCompound();
263
264 try
265 {
266 if (var19.addEntityID(var10))
267 {
268 var15.appendTag(var10);
269 }
270 }
271 catch (Exception e)
272 {
273 FMLLog.log(Level.SEVERE, e,
274 "An Entity type %s has thrown an exception trying to write state. It will not persist. Report this to the mod author",
275 var19.getClass().getName());
276 }
277 }
278 }
279
280 par3NBTTagCompound.setTag("Entities", var15);
281 NBTTagList var16 = new NBTTagList();
282 var17 = par1Chunk.chunkTileEntityMap.values().iterator();
283
284 while (var17.hasNext())
285 {
286 TileEntity var21 = (TileEntity)var17.next();
287 var10 = new NBTTagCompound();
288 try
289 {
290 var21.writeToNBT(var10);
291 var16.appendTag(var10);
292 }
293 catch (Exception e)
294 {
295 FMLLog.log(Level.SEVERE, e,
296 "A TileEntity type %s has throw an exception trying to write state. It will not persist. Report this to the mod author",
297 var21.getClass().getName());
298 }
299 }
300
301 par3NBTTagCompound.setTag("TileEntities", var16);
302 List var18 = par2World.getPendingBlockUpdates(par1Chunk, false);
303
304 if (var18 != null)
305 {
306 long var20 = par2World.getTotalWorldTime();
307 NBTTagList var11 = new NBTTagList();
308 Iterator var12 = var18.iterator();
309
310 while (var12.hasNext())
311 {
312 NextTickListEntry var13 = (NextTickListEntry)var12.next();
313 NBTTagCompound var14 = new NBTTagCompound();
314 var14.setInteger("i", var13.blockID);
315 var14.setInteger("x", var13.xCoord);
316 var14.setInteger("y", var13.yCoord);
317 var14.setInteger("z", var13.zCoord);
318 var14.setInteger("t", (int)(var13.scheduledTime - var20));
319 var11.appendTag(var14);
320 }
321
322 par3NBTTagCompound.setTag("TileTicks", var11);
323 }
324 }
325
326 /**
327 * Reads the data stored in the passed NBTTagCompound and creates a Chunk with that data in the passed World.
328 * Returns the created Chunk.
329 */
330 private Chunk readChunkFromNBT(World par1World, NBTTagCompound par2NBTTagCompound)
331 {
332 int var3 = par2NBTTagCompound.getInteger("xPos");
333 int var4 = par2NBTTagCompound.getInteger("zPos");
334 Chunk var5 = new Chunk(par1World, var3, var4);
335 var5.heightMap = par2NBTTagCompound.getIntArray("HeightMap");
336 var5.isTerrainPopulated = par2NBTTagCompound.getBoolean("TerrainPopulated");
337 NBTTagList var6 = par2NBTTagCompound.getTagList("Sections");
338 byte var7 = 16;
339 ExtendedBlockStorage[] var8 = new ExtendedBlockStorage[var7];
340
341 for (int var9 = 0; var9 < var6.tagCount(); ++var9)
342 {
343 NBTTagCompound var10 = (NBTTagCompound)var6.tagAt(var9);
344 byte var11 = var10.getByte("Y");
345 ExtendedBlockStorage var12 = new ExtendedBlockStorage(var11 << 4);
346 var12.setBlockLSBArray(var10.getByteArray("Blocks"));
347
348 if (var10.hasKey("Add"))
349 {
350 var12.setBlockMSBArray(new NibbleArray(var10.getByteArray("Add"), 4));
351 }
352
353 var12.setBlockMetadataArray(new NibbleArray(var10.getByteArray("Data"), 4));
354 var12.setSkylightArray(new NibbleArray(var10.getByteArray("SkyLight"), 4));
355 var12.setBlocklightArray(new NibbleArray(var10.getByteArray("BlockLight"), 4));
356 var12.removeInvalidBlocks();
357 var8[var11] = var12;
358 }
359
360 var5.setStorageArrays(var8);
361
362 if (par2NBTTagCompound.hasKey("Biomes"))
363 {
364 var5.setBiomeArray(par2NBTTagCompound.getByteArray("Biomes"));
365 }
366
367 NBTTagList var14 = par2NBTTagCompound.getTagList("Entities");
368
369 if (var14 != null)
370 {
371 for (int var17 = 0; var17 < var14.tagCount(); ++var17)
372 {
373 NBTTagCompound var16 = (NBTTagCompound)var14.tagAt(var17);
374 Entity var18 = EntityList.createEntityFromNBT(var16, par1World);
375 var5.hasEntities = true;
376
377 if (var18 != null)
378 {
379 var5.addEntity(var18);
380 }
381 }
382 }
383
384 NBTTagList var15 = par2NBTTagCompound.getTagList("TileEntities");
385
386 if (var15 != null)
387 {
388 for (int var21 = 0; var21 < var15.tagCount(); ++var21)
389 {
390 NBTTagCompound var20 = (NBTTagCompound)var15.tagAt(var21);
391 TileEntity var13 = TileEntity.createAndLoadEntity(var20);
392
393 if (var13 != null)
394 {
395 var5.addTileEntity(var13);
396 }
397 }
398 }
399
400 if (par2NBTTagCompound.hasKey("TileTicks"))
401 {
402 NBTTagList var19 = par2NBTTagCompound.getTagList("TileTicks");
403
404 if (var19 != null)
405 {
406 for (int var22 = 0; var22 < var19.tagCount(); ++var22)
407 {
408 NBTTagCompound var23 = (NBTTagCompound)var19.tagAt(var22);
409 par1World.scheduleBlockUpdateFromLoad(var23.getInteger("x"), var23.getInteger("y"), var23.getInteger("z"), var23.getInteger("i"), var23.getInteger("t"));
410 }
411 }
412 }
413
414 return var5;
415 }
416 }