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    }