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annotate org.eclipse.core.databinding.observable/src/org/eclipse/core/databinding/observable/set/AbstractObservableSet.d @ 95:6208d4f6a277

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Added trees for databinding.beans and observable
author Frank Benoit <benoit@tionex.de>
date Tue, 21 Apr 2009 10:55:51 +0200
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children b74ac5dfcc06
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1 /*******************************************************************************
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2 * Copyright (c) 2006, 2008 IBM Corporation and others.
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3 * All rights reserved. This program and the accompanying materials
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4 * are made available under the terms of the Eclipse Public License v1.0
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5 * which accompanies this distribution, and is available at
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6 * http://www.eclipse.org/legal/epl-v10.html
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7 *
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8 * Contributors:
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9 * IBM Corporation - initial API and implementation
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10 * Matthew Hall - bug 208332
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11 *******************************************************************************/
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12
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13 package org.eclipse.core.databinding.observable.set;
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14
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15 import java.util.Collection;
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16 import java.util.Iterator;
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17 import java.util.Set;
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18
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19 import org.eclipse.core.databinding.observable.AbstractObservable;
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20 import org.eclipse.core.databinding.observable.ChangeSupport;
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21 import org.eclipse.core.databinding.observable.ObservableTracker;
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22 import org.eclipse.core.databinding.observable.Realm;
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23
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24 /**
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25 *
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26 * Abstract implementation of {@link IObservableSet}.
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27 *
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28 * <p>
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29 * This class is thread safe. All state accessing methods must be invoked from
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30 * the {@link Realm#isCurrent() current realm}. Methods for adding and removing
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31 * listeners may be invoked from any thread.
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32 * </p>
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33 *
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34 * @since 1.0
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35 */
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36 public abstract class AbstractObservableSet : AbstractObservable ,
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37 IObservableSet {
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38
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39 private ChangeSupport changeSupport;
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40
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41 private bool stale = false;
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42
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43 protected this() {
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44 this(Realm.getDefault());
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45 }
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46
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47 protected void firstListenerAdded() {
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48 super.firstListenerAdded();
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49 }
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50
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51 protected void lastListenerRemoved() {
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52 super.lastListenerRemoved();
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53 }
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54
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55 protected this(Realm realm) {
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56 super(realm);
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57 changeSupport = new class(realm) ChangeSupport {
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58 protected void firstListenerAdded() {
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59 this.outer.firstListenerAdded();
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60 }
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61 protected void lastListenerRemoved() {
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62 this.outer.lastListenerRemoved();
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63 }
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64 };
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65 }
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66
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67 public synchronized void addSetChangeListener(ISetChangeListener listener) {
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68 changeSupport.addListener(SetChangeEvent.TYPE, listener);
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69 }
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70
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71 public synchronized void removeSetChangeListener(ISetChangeListener listener) {
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72 changeSupport.removeListener(SetChangeEvent.TYPE, listener);
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73 }
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74
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75 protected abstract Set getWrappedSet();
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76
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77 protected void fireSetChange(SetDiff diff) {
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78 // fire general change event first
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79 super.fireChange();
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80
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81 changeSupport.fireEvent(new SetChangeEvent(this, diff));
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82 }
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83
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84 public bool contains(Object o) {
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85 getterCalled();
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86 return getWrappedSet().contains(o);
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87 }
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88
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89 public bool containsAll(Collection c) {
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90 getterCalled();
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91 return getWrappedSet().containsAll(c);
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92 }
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93
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94 public override equals_t opEquals(Object o) {
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95 getterCalled();
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96 return getWrappedSet().equals(o);
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97 }
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98
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99 public override hash_t toHash() {
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100 getterCalled();
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101 return getWrappedSet().hashCode();
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102 }
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103
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104 public bool isEmpty() {
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105 getterCalled();
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106 return getWrappedSet().isEmpty();
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107 }
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108
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109 public Iterator iterator() {
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110 getterCalled();
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111 final Iterator wrappedIterator = getWrappedSet().iterator();
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112 return new class() Iterator {
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113
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114 public void remove() {
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115 throw new UnsupportedOperationException();
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116 }
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117
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118 public bool hasNext() {
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119 ObservableTracker.getterCalled(this.outer);
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120 return wrappedIterator.hasNext();
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121 }
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122
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123 public Object next() {
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124 ObservableTracker.getterCalled(this.outer);
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125 return wrappedIterator.next();
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126 }
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127 };
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128 }
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129
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130 public int size() {
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131 getterCalled();
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132 return getWrappedSet().size();
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133 }
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134
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135 public Object[] toArray() {
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136 getterCalled();
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137 return getWrappedSet().toArray();
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138 }
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139
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140 public Object[] toArray(Object[] a) {
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141 getterCalled();
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142 return getWrappedSet().toArray(a);
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143 }
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144
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145 public String toString() {
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146 getterCalled();
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147 return getWrappedSet().toString();
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148 }
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149
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150 protected void getterCalled() {
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151 ObservableTracker.getterCalled(this);
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152 }
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153
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154 public bool add(Object o) {
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155 throw new UnsupportedOperationException();
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156 }
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157
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158 public bool addAll(Collection c) {
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159 throw new UnsupportedOperationException();
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160 }
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161
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162 public bool remove(Object o) {
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163 throw new UnsupportedOperationException();
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164 }
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165
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166 public bool removeAll(Collection c) {
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167 throw new UnsupportedOperationException();
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168 }
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169
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170 public bool retainAll(Collection c) {
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171 throw new UnsupportedOperationException();
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172 }
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173
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174 public void clear() {
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175 throw new UnsupportedOperationException();
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176 }
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177
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178 /**
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179 * @return Returns the stale state.
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180 */
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181 public bool isStale() {
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182 getterCalled();
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183 return stale;
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184 }
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185
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186 /**
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187 * @param stale
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188 * The stale state to set. This will fire a stale event if the
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189 * given bool is true and this observable set was not already
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190 * stale.
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191 */
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192 public void setStale(bool stale) {
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193 checkRealm();
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194 bool wasStale = this.stale;
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195 this.stale = stale;
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196 if (!wasStale && stale) {
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197 fireStale();
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198 }
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199 }
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200
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201
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202 protected void fireChange() {
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203 throw new RuntimeException("fireChange should not be called, use fireSetChange() instead"); //$NON-NLS-1$
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204 }
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205
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206 /* (non-Javadoc)
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207 * @see org.eclipse.jface.provisional.databinding.observable.AbstractObservable#dispose()
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208 */
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209 public synchronized void dispose() {
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210 super.dispose();
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211
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212 if (changeSupport !is null) {
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213 changeSupport.dispose();
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214 changeSupport = null;
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215 }
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216 }
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217
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218 }