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.FileInputStream;
007 import java.io.FileOutputStream;
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
014 public class MapStorage
015 {
016 private ISaveHandler saveHandler;
017
018 /** Map of item data String id to loaded MapDataBases */
019 private Map loadedDataMap = new HashMap();
020
021 /** List of loaded MapDataBases. */
022 private List loadedDataList = new ArrayList();
023
024 /**
025 * Map of MapDataBase id String prefixes ('map' etc) to max known unique Short id (the 0 part etc) for that prefix
026 */
027 private Map idCounts = new HashMap();
028
029 public MapStorage(ISaveHandler par1ISaveHandler)
030 {
031 this.saveHandler = par1ISaveHandler;
032 this.loadIdCounts();
033 }
034
035 /**
036 * Loads an existing MapDataBase corresponding to the given String id from disk, instantiating the given Class, or
037 * returns null if none such file exists. args: Class to instantiate, String dataid
038 */
039 public WorldSavedData loadData(Class par1Class, String par2Str)
040 {
041 WorldSavedData var3 = (WorldSavedData)this.loadedDataMap.get(par2Str);
042
043 if (var3 != null)
044 {
045 return var3;
046 }
047 else
048 {
049 if (this.saveHandler != null)
050 {
051 try
052 {
053 File var4 = this.saveHandler.getMapFileFromName(par2Str);
054
055 if (var4 != null && var4.exists())
056 {
057 try
058 {
059 var3 = (WorldSavedData)par1Class.getConstructor(new Class[] {String.class}).newInstance(new Object[] {par2Str});
060 }
061 catch (Exception var7)
062 {
063 throw new RuntimeException("Failed to instantiate " + par1Class.toString(), var7);
064 }
065
066 FileInputStream var5 = new FileInputStream(var4);
067 NBTTagCompound var6 = CompressedStreamTools.readCompressed(var5);
068 var5.close();
069 var3.readFromNBT(var6.getCompoundTag("data"));
070 }
071 }
072 catch (Exception var8)
073 {
074 var8.printStackTrace();
075 }
076 }
077
078 if (var3 != null)
079 {
080 this.loadedDataMap.put(par2Str, var3);
081 this.loadedDataList.add(var3);
082 }
083
084 return var3;
085 }
086 }
087
088 /**
089 * Assigns the given String id to the given MapDataBase, removing any existing ones of the same id.
090 */
091 public void setData(String par1Str, WorldSavedData par2WorldSavedData)
092 {
093 if (par2WorldSavedData == null)
094 {
095 throw new RuntimeException("Can\'t set null data");
096 }
097 else
098 {
099 if (this.loadedDataMap.containsKey(par1Str))
100 {
101 this.loadedDataList.remove(this.loadedDataMap.remove(par1Str));
102 }
103
104 this.loadedDataMap.put(par1Str, par2WorldSavedData);
105 this.loadedDataList.add(par2WorldSavedData);
106 }
107 }
108
109 /**
110 * Saves all dirty loaded MapDataBases to disk.
111 */
112 public void saveAllData()
113 {
114 Iterator var1 = this.loadedDataList.iterator();
115
116 while (var1.hasNext())
117 {
118 WorldSavedData var2 = (WorldSavedData)var1.next();
119
120 if (var2.isDirty())
121 {
122 this.saveData(var2);
123 var2.setDirty(false);
124 }
125 }
126 }
127
128 /**
129 * Saves the given MapDataBase to disk.
130 */
131 private void saveData(WorldSavedData par1WorldSavedData)
132 {
133 if (this.saveHandler != null)
134 {
135 try
136 {
137 File var2 = this.saveHandler.getMapFileFromName(par1WorldSavedData.mapName);
138
139 if (var2 != null)
140 {
141 NBTTagCompound var3 = new NBTTagCompound();
142 par1WorldSavedData.writeToNBT(var3);
143 NBTTagCompound var4 = new NBTTagCompound();
144 var4.setCompoundTag("data", var3);
145 FileOutputStream var5 = new FileOutputStream(var2);
146 CompressedStreamTools.writeCompressed(var4, var5);
147 var5.close();
148 }
149 }
150 catch (Exception var6)
151 {
152 var6.printStackTrace();
153 }
154 }
155 }
156
157 /**
158 * Loads the idCounts Map from the 'idcounts' file.
159 */
160 private void loadIdCounts()
161 {
162 try
163 {
164 this.idCounts.clear();
165
166 if (this.saveHandler == null)
167 {
168 return;
169 }
170
171 File var1 = this.saveHandler.getMapFileFromName("idcounts");
172
173 if (var1 != null && var1.exists())
174 {
175 DataInputStream var2 = new DataInputStream(new FileInputStream(var1));
176 NBTTagCompound var3 = CompressedStreamTools.read(var2);
177 var2.close();
178 Iterator var4 = var3.getTags().iterator();
179
180 while (var4.hasNext())
181 {
182 NBTBase var5 = (NBTBase)var4.next();
183
184 if (var5 instanceof NBTTagShort)
185 {
186 NBTTagShort var6 = (NBTTagShort)var5;
187 String var7 = var6.getName();
188 short var8 = var6.data;
189 this.idCounts.put(var7, Short.valueOf(var8));
190 }
191 }
192 }
193 }
194 catch (Exception var9)
195 {
196 var9.printStackTrace();
197 }
198 }
199
200 /**
201 * Returns an unique new data id for the given prefix and saves the idCounts map to the 'idcounts' file.
202 */
203 public int getUniqueDataId(String par1Str)
204 {
205 Short var2 = (Short)this.idCounts.get(par1Str);
206
207 if (var2 == null)
208 {
209 var2 = Short.valueOf((short)0);
210 }
211 else
212 {
213 var2 = Short.valueOf((short)(var2.shortValue() + 1));
214 }
215
216 this.idCounts.put(par1Str, var2);
217
218 if (this.saveHandler == null)
219 {
220 return var2.shortValue();
221 }
222 else
223 {
224 try
225 {
226 File var3 = this.saveHandler.getMapFileFromName("idcounts");
227
228 if (var3 != null)
229 {
230 NBTTagCompound var4 = new NBTTagCompound();
231 Iterator var5 = this.idCounts.keySet().iterator();
232
233 while (var5.hasNext())
234 {
235 String var6 = (String)var5.next();
236 short var7 = ((Short)this.idCounts.get(var6)).shortValue();
237 var4.setShort(var6, var7);
238 }
239
240 DataOutputStream var9 = new DataOutputStream(new FileOutputStream(var3));
241 CompressedStreamTools.write(var4, var9);
242 var9.close();
243 }
244 }
245 catch (Exception var8)
246 {
247 var8.printStackTrace();
248 }
249
250 return var2.shortValue();
251 }
252 }
253 }