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1
56
57 package org.objectstyle.cayenne.client;
58
59 import java.util.ArrayList  ;
60 import java.util.Collection ;
61 import java.util.Collections ;
62 import java.util.HashSet ;
63 import java.util.Iterator ;
64 import java.util.List ;
65 import java.util.Set ;
66
67 import org.objectstyle.cayenne.PersistenceState;
68 import org.objectstyle.cayenne.Persistent;
69 import org.objectstyle.cayenne.graph.GraphChangeHandler;
70 import org.objectstyle.cayenne.graph.GraphMap;
71
72
78 class ClientStateRecorder implements GraphChangeHandler {
79
80 Set dirtyIds;
81
82 ClientStateRecorder() {
83 this.dirtyIds = new HashSet ();
84 }
85
86 void clear() {
87 dirtyIds = new HashSet ();
88 }
89
90
93 void processCommit(GraphMap graphMap) {
94 Iterator it = dirtyIds.iterator();
95 while (it.hasNext()) {
96 Object node = graphMap.getNode(it.next());
97 if (node instanceof Persistent) {
98 Persistent persistentNode = (Persistent) node;
99 switch (persistentNode.getPersistenceState()) {
100 case PersistenceState.MODIFIED:
101 case PersistenceState.NEW:
102 persistentNode.setPersistenceState(PersistenceState.COMMITTED);
103 break;
104 case PersistenceState.DELETED:
105 persistentNode.setPersistenceState(PersistenceState.TRANSIENT);
106 break;
107 }
108 }
109 }
110
111 clear();
112 }
113
114 boolean hasChanges() {
115 return !dirtyIds.isEmpty();
116 }
117
118 Collection dirtyNodes(GraphMap graphMap) {
119 if (dirtyIds.isEmpty()) {
120 return Collections.EMPTY_SET;
121 }
122
123 List objects = new ArrayList (dirtyIds.size());
124 Iterator it = dirtyIds.iterator();
125 while (it.hasNext()) {
126 objects.add(graphMap.getNode(it.next()));
127 }
128
129 return objects;
130 }
131
132 Collection dirtyNodes(GraphMap graphMap, int state) {
133 if (dirtyIds.isEmpty()) {
134 return Collections.EMPTY_SET;
135 }
136
137 int size = dirtyIds.size();
138 List objects = new ArrayList (size > 50 ? size / 2 : size);
139 Iterator it = dirtyIds.iterator();
140 while (it.hasNext()) {
141 Persistent o = (Persistent) graphMap.getNode(it.next());
142
143 if (o.getPersistenceState() == state) {
144 objects.add(o);
145 }
146 }
147
148 return objects;
149 }
150
151
153 public void nodeIdChanged(Object nodeId, Object newId) {
154 if (dirtyIds.remove(nodeId)) {
155 dirtyIds.add(newId);
156 }
157 }
158
159 public void nodeCreated(Object nodeId) {
160 dirtyIds.add(nodeId);
161 }
162
163 public void nodeRemoved(Object nodeId) {
164 dirtyIds.add(nodeId);
165 }
166
167 public void nodePropertyChanged(
168 Object nodeId,
169 String property,
170 Object oldValue,
171 Object newValue) {
172 dirtyIds.add(nodeId);
173 }
174
175 public void arcCreated(Object nodeId, Object targetNodeId, Object arcId) {
176 dirtyIds.add(nodeId);
177 }
178
179 public void arcDeleted(Object nodeId, Object targetNodeId, Object arcId) {
180 dirtyIds.add(nodeId);
181 }
182 }
183 |
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