001 /*
002 GRANITE DATA SERVICES
003 Copyright (C) 2012 GRANITE DATA SERVICES S.A.S.
004
005 This file is part of Granite Data Services.
006
007 Granite Data Services is free software; you can redistribute it and/or modify
008 it under the terms of the GNU Library General Public License as published by
009 the Free Software Foundation; either version 2 of the License, or (at your
010 option) any later version.
011
012 Granite Data Services is distributed in the hope that it will be useful, but
013 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
014 FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License
015 for more details.
016
017 You should have received a copy of the GNU Library General Public License
018 along with this library; if not, see <http://www.gnu.org/licenses/>.
019 */
020
021 package org.granite.client.tide.data.spi;
022
023 import java.util.HashMap;
024 import java.util.HashSet;
025 import java.util.IdentityHashMap;
026 import java.util.LinkedList;
027 import java.util.List;
028 import java.util.Map;
029 import java.util.Set;
030
031 import org.granite.client.tide.data.Conflicts;
032 import org.granite.client.tide.data.EntityManager;
033 import org.granite.client.tide.data.Identifiable;
034 import org.granite.client.tide.server.ServerSession;
035
036 /**
037 * @author William DRAI
038 */
039 public class MergeContext {
040
041 private static ThreadLocal<Map<EntityManager, MergeContext>> mergeContext = new ThreadLocal<Map<EntityManager, MergeContext>>() {
042 @Override
043 protected Map<EntityManager, MergeContext> initialValue() {
044 return new HashMap<EntityManager, MergeContext>();
045 }
046 };
047
048 private final EntityManager entityManager;
049 private final DirtyCheckContext dirtyCheckContext;
050 private IdentityHashMap<Object, Object> entityCache = null;
051 private LinkedList<Object> mergeStack = new LinkedList<Object>();
052
053 private String externalDataSessionId = null;
054 private EntityManager sourceEntityManager = null;
055 private ServerSession serverSession = null;
056 private boolean mergeUpdate = false;
057 private boolean merging = false;
058 private Set<Object> versionChangeCache = null;
059 private boolean resolvingConflict = false;
060 private boolean skipDirtyCheck = false;
061 private Conflicts mergeConflicts = null;
062 private boolean uninitializing = false;
063
064
065 public static MergeContext get(EntityManager entityManager) {
066 return mergeContext.get().get(entityManager);
067 }
068
069 public static void destroy(EntityManager entityManager) {
070 mergeContext.get().remove(entityManager);
071 }
072
073
074 public MergeContext(EntityManager entityManager, DirtyCheckContext dirtyCheckContext, ServerSession serverSession) {
075 this.entityManager = entityManager;
076 this.dirtyCheckContext = dirtyCheckContext;
077 this.serverSession = serverSession;
078 mergeContext.get().put(entityManager, this);
079 }
080
081
082 public void initMerge() {
083 if (this.entityCache == null) {
084 this.entityCache = new IdentityHashMap<Object, Object>();
085 this.mergeUpdate = true;
086 }
087 }
088
089 public void clear() {
090 this.entityCache = null;
091 this.mergeConflicts = null;
092 this.versionChangeCache = null;
093 this.resolvingConflict = false;
094 this.uninitializing = false;
095 this.merging = false;
096 this.mergeUpdate = false;
097 }
098
099 public void addConflict(Identifiable localEntity, Identifiable receivedEntity, List<String> properties) {
100 if (this.mergeConflicts == null)
101 this.mergeConflicts = new Conflicts(this.entityManager);
102
103 this.mergeConflicts.addConflict(localEntity, receivedEntity, properties);
104 }
105
106 public void initMergeConflicts() {
107 this.entityCache = null;
108 this.versionChangeCache = null;
109 this.resolvingConflict = false;
110 }
111
112 public void checkConflictsResolved() {
113 if (this.mergeConflicts != null && this.mergeConflicts.isAllResolved())
114 this.mergeConflicts = null;
115 }
116
117 public boolean isResolvingConflict() {
118 return this.resolvingConflict;
119 }
120
121 public void setResolvingConflict(boolean resolvingConflict) {
122 this.resolvingConflict = resolvingConflict;
123 }
124
125 public Conflicts getMergeConflicts() {
126 return this.mergeConflicts;
127 }
128
129 public Map<?, ?> getEntityCache() {
130 return this.entityCache;
131 }
132
133 public IdentityHashMap<Object, Object> saveEntityCache() {
134 IdentityHashMap<Object, Object> entityCache = this.entityCache;
135 this.entityCache = new IdentityHashMap<Object, Object>();
136 return entityCache;
137 }
138 public void restoreEntityCache(IdentityHashMap<Object, Object> entityCache) {
139 this.entityCache = entityCache;
140 }
141
142 public String getExternalDataSessionId() {
143 return this.externalDataSessionId;
144 }
145
146 public void setExternalDataSessionId(String externalDataSessionId) {
147 this.externalDataSessionId = externalDataSessionId;
148 }
149
150 public void setServerSession(ServerSession serverSession) {
151 this.serverSession = serverSession;
152 }
153
154 public ServerSession getServerSession() {
155 return serverSession;
156 }
157
158 public void setSourceEntityManager(EntityManager sourceEntityManager) {
159 this.sourceEntityManager = sourceEntityManager;
160 }
161
162 public EntityManager getSourceEntityManager() {
163 return this.sourceEntityManager;
164 }
165
166 public boolean isMergeUpdate() {
167 return this.mergeUpdate;
168 }
169
170 public void setMergeUpdate(boolean mergeUpdate) {
171 this.mergeUpdate = mergeUpdate;
172 }
173
174 public boolean isMerging() {
175 return this.merging;
176 }
177
178 public void setMerging(boolean merging) {
179 this.merging = merging;
180 }
181
182 public boolean isSkipDirtyCheck() {
183 return this.skipDirtyCheck;
184 }
185
186 public void setSkipDirtyCheck(boolean skipDirtyCheck) {
187 this.skipDirtyCheck = skipDirtyCheck;
188 }
189
190 public Object getFromCache(Object obj) {
191 if (this.entityCache == null)
192 return null;
193 return this.entityCache.get(obj);
194 }
195
196 public void pushMerge(Object obj, Object dest) {
197 pushMerge(obj, dest, true);
198 }
199 public void pushMerge(Object obj, Object dest, boolean push) {
200 if (this.entityCache != null)
201 this.entityCache.put(obj, dest);
202 if (push)
203 this.mergeStack.push(dest);
204 }
205 public Object getCachedMerge(Object obj) {
206 return this.entityCache.get(obj);
207 }
208 public Object popMerge() {
209 return this.mergeStack.pop();
210 }
211 public Object getCurrentMerge() {
212 return this.mergeStack.peek();
213 }
214 public void setCurrentMerge(Object merge) {
215 this.mergeStack.set(0, merge);
216 }
217 public int getMergeStackSize() {
218 return this.mergeStack.size();
219 }
220
221 public Object getSavedProperties(Object object) {
222 return dirtyCheckContext.getSavedProperties(object);
223 }
224
225 public Object getCachedObject(Object object) {
226 return entityManager.getCachedObject(object, true);
227 }
228
229 public Object[] getOwnerEntity(Object entity) {
230 return entityManager.getOwnerEntity(entity);
231 }
232
233 public boolean isUnsaved(Object object) {
234 return dirtyCheckContext.isUnsaved(object);
235 }
236
237 public void clearCache() {
238 this.entityCache = null;
239 }
240
241 private Set<Object> getVersionChangeCache() {
242 if (this.versionChangeCache == null)
243 this.versionChangeCache = new HashSet<Object>();
244 return this.versionChangeCache;
245 }
246
247 public void markVersionChanged(Object obj) {
248 getVersionChangeCache().add(obj);
249 }
250
251 public boolean hasVersionChanged(Object obj) {
252 return this.versionChangeCache != null ? this.versionChangeCache.contains(obj) : false;
253 }
254
255 public void setUninitializing(boolean uninitializing) {
256 this.uninitializing = uninitializing;
257 }
258
259 public boolean isUninitializing() {
260 return this.uninitializing;
261 }
262
263 public boolean isUninitializeAllowed() {
264 return this.entityManager.isUninitializeAllowed();
265 }
266 }