001 package net.minecraft.src;
002
003 import cpw.mods.fml.common.Side;
004 import cpw.mods.fml.common.asm.SideOnly;
005 import java.io.DataInputStream;
006 import java.io.DataOutputStream;
007 import java.io.IOException;
008 import java.util.ArrayList;
009 import java.util.HashMap;
010 import java.util.Iterator;
011 import java.util.List;
012 import java.util.Map;
013 import java.util.concurrent.locks.ReadWriteLock;
014 import java.util.concurrent.locks.ReentrantReadWriteLock;
015
016 public class DataWatcher
017 {
018 private static final HashMap dataTypes = new HashMap();
019 private final Map watchedObjects = new HashMap();
020
021 /** true if one or more object was changed */
022 private boolean objectChanged;
023 private ReadWriteLock field_75694_d = new ReentrantReadWriteLock();
024
025 /**
026 * adds a new object to dataWatcher to watch, to update an already existing object see updateObject. Arguments: data
027 * Value Id, Object to add
028 */
029 public void addObject(int par1, Object par2Obj)
030 {
031 Integer var3 = (Integer)dataTypes.get(par2Obj.getClass());
032
033 if (var3 == null)
034 {
035 throw new IllegalArgumentException("Unknown data type: " + par2Obj.getClass());
036 }
037 else if (par1 > 31)
038 {
039 throw new IllegalArgumentException("Data value id is too big with " + par1 + "! (Max is " + 31 + ")");
040 }
041 else if (this.watchedObjects.containsKey(Integer.valueOf(par1)))
042 {
043 throw new IllegalArgumentException("Duplicate id value for " + par1 + "!");
044 }
045 else
046 {
047 WatchableObject var4 = new WatchableObject(var3.intValue(), par1, par2Obj);
048 this.field_75694_d.writeLock().lock();
049 this.watchedObjects.put(Integer.valueOf(par1), var4);
050 this.field_75694_d.writeLock().unlock();
051 }
052 }
053
054 /**
055 * Add a new object for the DataWatcher to watch, using the specified data type.
056 */
057 public void addObjectByDataType(int par1, int par2)
058 {
059 WatchableObject var3 = new WatchableObject(par2, par1, (Object)null);
060 this.field_75694_d.writeLock().lock();
061 this.watchedObjects.put(Integer.valueOf(par1), var3);
062 this.field_75694_d.writeLock().unlock();
063 }
064
065 /**
066 * gets the bytevalue of a watchable object
067 */
068 public byte getWatchableObjectByte(int par1)
069 {
070 return ((Byte)this.getWatchedObject(par1).getObject()).byteValue();
071 }
072
073 public short getWatchableObjectShort(int par1)
074 {
075 return ((Short)this.getWatchedObject(par1).getObject()).shortValue();
076 }
077
078 /**
079 * gets a watchable object and returns it as a Integer
080 */
081 public int getWatchableObjectInt(int par1)
082 {
083 return ((Integer)this.getWatchedObject(par1).getObject()).intValue();
084 }
085
086 /**
087 * gets a watchable object and returns it as a String
088 */
089 public String getWatchableObjectString(int par1)
090 {
091 return (String)this.getWatchedObject(par1).getObject();
092 }
093
094 /**
095 * Get a watchable object as an ItemStack.
096 */
097 public ItemStack getWatchableObjectItemStack(int par1)
098 {
099 return (ItemStack)this.getWatchedObject(par1).getObject();
100 }
101
102 /**
103 * is threadsafe, unless it throws an exception, then
104 */
105 private WatchableObject getWatchedObject(int par1)
106 {
107 this.field_75694_d.readLock().lock();
108 WatchableObject var2;
109
110 try
111 {
112 var2 = (WatchableObject)this.watchedObjects.get(Integer.valueOf(par1));
113 }
114 catch (Throwable var6)
115 {
116 CrashReport var4 = CrashReport.func_85055_a(var6, "Getting synched entity data");
117 CrashReportCategory var5 = var4.func_85058_a("Synched entity data");
118 var5.addCrashSection("Data ID", Integer.valueOf(par1));
119 throw new ReportedException(var4);
120 }
121
122 this.field_75694_d.readLock().unlock();
123 return var2;
124 }
125
126 /**
127 * updates an already existing object
128 */
129 public void updateObject(int par1, Object par2Obj)
130 {
131 WatchableObject var3 = this.getWatchedObject(par1);
132
133 if (!par2Obj.equals(var3.getObject()))
134 {
135 var3.setObject(par2Obj);
136 var3.setWatched(true);
137 this.objectChanged = true;
138 }
139 }
140
141 public void func_82708_h(int par1)
142 {
143 WatchableObject.setWatchableObjectWatched(this.getWatchedObject(par1), true);
144 this.objectChanged = true;
145 }
146
147 public boolean hasChanges()
148 {
149 return this.objectChanged;
150 }
151
152 /**
153 * writes every object in passed list to dataoutputstream, terminated by 0x7F
154 */
155 public static void writeObjectsInListToStream(List par0List, DataOutputStream par1DataOutputStream) throws IOException
156 {
157 if (par0List != null)
158 {
159 Iterator var2 = par0List.iterator();
160
161 while (var2.hasNext())
162 {
163 WatchableObject var3 = (WatchableObject)var2.next();
164 writeWatchableObject(par1DataOutputStream, var3);
165 }
166 }
167
168 par1DataOutputStream.writeByte(127);
169 }
170
171 public List unwatchAndReturnAllWatched()
172 {
173 ArrayList var1 = null;
174
175 if (this.objectChanged)
176 {
177 this.field_75694_d.readLock().lock();
178 Iterator var2 = this.watchedObjects.values().iterator();
179
180 while (var2.hasNext())
181 {
182 WatchableObject var3 = (WatchableObject)var2.next();
183
184 if (var3.isWatched())
185 {
186 var3.setWatched(false);
187
188 if (var1 == null)
189 {
190 var1 = new ArrayList();
191 }
192
193 var1.add(var3);
194 }
195 }
196
197 this.field_75694_d.readLock().unlock();
198 }
199
200 this.objectChanged = false;
201 return var1;
202 }
203
204 public void writeWatchableObjects(DataOutputStream par1DataOutputStream) throws IOException
205 {
206 this.field_75694_d.readLock().lock();
207 Iterator var2 = this.watchedObjects.values().iterator();
208
209 while (var2.hasNext())
210 {
211 WatchableObject var3 = (WatchableObject)var2.next();
212 writeWatchableObject(par1DataOutputStream, var3);
213 }
214
215 this.field_75694_d.readLock().unlock();
216 par1DataOutputStream.writeByte(127);
217 }
218
219 public List func_75685_c()
220 {
221 ArrayList var1 = null;
222 this.field_75694_d.readLock().lock();
223 WatchableObject var3;
224
225 for (Iterator var2 = this.watchedObjects.values().iterator(); var2.hasNext(); var1.add(var3))
226 {
227 var3 = (WatchableObject)var2.next();
228
229 if (var1 == null)
230 {
231 var1 = new ArrayList();
232 }
233 }
234
235 this.field_75694_d.readLock().unlock();
236 return var1;
237 }
238
239 private static void writeWatchableObject(DataOutputStream par0DataOutputStream, WatchableObject par1WatchableObject) throws IOException
240 {
241 int var2 = (par1WatchableObject.getObjectType() << 5 | par1WatchableObject.getDataValueId() & 31) & 255;
242 par0DataOutputStream.writeByte(var2);
243
244 switch (par1WatchableObject.getObjectType())
245 {
246 case 0:
247 par0DataOutputStream.writeByte(((Byte)par1WatchableObject.getObject()).byteValue());
248 break;
249 case 1:
250 par0DataOutputStream.writeShort(((Short)par1WatchableObject.getObject()).shortValue());
251 break;
252 case 2:
253 par0DataOutputStream.writeInt(((Integer)par1WatchableObject.getObject()).intValue());
254 break;
255 case 3:
256 par0DataOutputStream.writeFloat(((Float)par1WatchableObject.getObject()).floatValue());
257 break;
258 case 4:
259 Packet.writeString((String)par1WatchableObject.getObject(), par0DataOutputStream);
260 break;
261 case 5:
262 ItemStack var4 = (ItemStack)par1WatchableObject.getObject();
263 Packet.writeItemStack(var4, par0DataOutputStream);
264 break;
265 case 6:
266 ChunkCoordinates var3 = (ChunkCoordinates)par1WatchableObject.getObject();
267 par0DataOutputStream.writeInt(var3.posX);
268 par0DataOutputStream.writeInt(var3.posY);
269 par0DataOutputStream.writeInt(var3.posZ);
270 }
271 }
272
273 public static List readWatchableObjects(DataInputStream par0DataInputStream) throws IOException
274 {
275 ArrayList var1 = null;
276
277 for (byte var2 = par0DataInputStream.readByte(); var2 != 127; var2 = par0DataInputStream.readByte())
278 {
279 if (var1 == null)
280 {
281 var1 = new ArrayList();
282 }
283
284 int var3 = (var2 & 224) >> 5;
285 int var4 = var2 & 31;
286 WatchableObject var5 = null;
287
288 switch (var3)
289 {
290 case 0:
291 var5 = new WatchableObject(var3, var4, Byte.valueOf(par0DataInputStream.readByte()));
292 break;
293 case 1:
294 var5 = new WatchableObject(var3, var4, Short.valueOf(par0DataInputStream.readShort()));
295 break;
296 case 2:
297 var5 = new WatchableObject(var3, var4, Integer.valueOf(par0DataInputStream.readInt()));
298 break;
299 case 3:
300 var5 = new WatchableObject(var3, var4, Float.valueOf(par0DataInputStream.readFloat()));
301 break;
302 case 4:
303 var5 = new WatchableObject(var3, var4, Packet.readString(par0DataInputStream, 64));
304 break;
305 case 5:
306 var5 = new WatchableObject(var3, var4, Packet.readItemStack(par0DataInputStream));
307 break;
308 case 6:
309 int var6 = par0DataInputStream.readInt();
310 int var7 = par0DataInputStream.readInt();
311 int var8 = par0DataInputStream.readInt();
312 var5 = new WatchableObject(var3, var4, new ChunkCoordinates(var6, var7, var8));
313 }
314
315 var1.add(var5);
316 }
317
318 return var1;
319 }
320
321 @SideOnly(Side.CLIENT)
322 public void updateWatchedObjectsFromList(List par1List)
323 {
324 this.field_75694_d.writeLock().lock();
325 Iterator var2 = par1List.iterator();
326
327 while (var2.hasNext())
328 {
329 WatchableObject var3 = (WatchableObject)var2.next();
330 WatchableObject var4 = (WatchableObject)this.watchedObjects.get(Integer.valueOf(var3.getDataValueId()));
331
332 if (var4 != null)
333 {
334 var4.setObject(var3.getObject());
335 }
336 }
337
338 this.field_75694_d.writeLock().unlock();
339 }
340
341 static
342 {
343 dataTypes.put(Byte.class, Integer.valueOf(0));
344 dataTypes.put(Short.class, Integer.valueOf(1));
345 dataTypes.put(Integer.class, Integer.valueOf(2));
346 dataTypes.put(Float.class, Integer.valueOf(3));
347 dataTypes.put(String.class, Integer.valueOf(4));
348 dataTypes.put(ItemStack.class, Integer.valueOf(5));
349 dataTypes.put(ChunkCoordinates.class, Integer.valueOf(6));
350 }
351 }