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annotate org.eclipse.core.databinding.observable/src/org/eclipse/core/databinding/observable/map/AbstractObservableMap.d @ 97:c86eb8b3098e

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packageimport
author Frank Benoit <benoit@tionex.de>
date Tue, 21 Apr 2009 11:18:25 +0200
parents b74ac5dfcc06
children
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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 * Brad Reynolds - bug 164653
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11 * Matthew Hall - bugs 118516, 240931
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12 *******************************************************************************/
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13
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14 module org.eclipse.core.databinding.observable.map.AbstractObservableMap;
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15 import org.eclipse.core.databinding.observable.map.MapDiff;
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16 import org.eclipse.core.databinding.observable.map.MapChangeEvent;
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17 import org.eclipse.core.databinding.observable.map.IMapChangeListener;
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18 import org.eclipse.core.databinding.observable.map.IObservableMap;
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19
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20 import java.lang.all;
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21
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22 import java.util.AbstractMap;
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23
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24 import org.eclipse.core.databinding.observable.ChangeEvent;
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25 import org.eclipse.core.databinding.observable.ChangeSupport;
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26 import org.eclipse.core.databinding.observable.IChangeListener;
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27 import org.eclipse.core.databinding.observable.IStaleListener;
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28 import org.eclipse.core.databinding.observable.Realm;
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29 import org.eclipse.core.databinding.observable.StaleEvent;
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30 import org.eclipse.core.runtime.Assert;
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31 import org.eclipse.core.runtime.AssertionFailedException;
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32
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33 /**
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34 *
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35 * <p>
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36 * This class is thread safe. All state accessing methods must be invoked from
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37 * the {@link Realm#isCurrent() current realm}. Methods for adding and removing
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38 * listeners may be invoked from any thread.
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39 * </p>
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40 * @since 1.0
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41 */
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42 public abstract class AbstractObservableMap : AbstractMap ,
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43 IObservableMap {
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44
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45 private ChangeSupport changeSupport;
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46
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47 private bool stale;
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48
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49 /**
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50 */
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51 public this() {
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52 this(Realm.getDefault());
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53 }
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54
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55 /**
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56 *
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57 */
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58 protected void lastListenerRemoved() {
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59 }
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60
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61 /**
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62 *
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63 */
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64 protected void firstListenerAdded() {
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65 }
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66
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67 /**
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68 * @param realm
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69 */
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70 public this(Realm realm) {
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71 Assert.isNotNull(realm, "Realm cannot be null"); //$NON-NLS-1$
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72 changeSupport = new class(realm) ChangeSupport {
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73 protected void firstListenerAdded() {
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74 this.outer.firstListenerAdded();
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75 }
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76 protected void lastListenerRemoved() {
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77 this.outer.lastListenerRemoved();
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78 }
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79 };
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80 }
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81
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82 public synchronized void addMapChangeListener(IMapChangeListener listener) {
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83 if (changeSupport !is null) {
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84 changeSupport.addListener(MapChangeEvent.TYPE, listener);
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85 }
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86 }
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87
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88 public synchronized void removeMapChangeListener(IMapChangeListener listener) {
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89 if (changeSupport !is null) {
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90 changeSupport.removeListener(MapChangeEvent.TYPE, listener);
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91 }
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92 }
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93
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94 public synchronized void addChangeListener(IChangeListener listener) {
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95 if (changeSupport !is null) {
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96 changeSupport.addChangeListener(listener);
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97 }
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98 }
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99
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100 public synchronized void addStaleListener(IStaleListener listener) {
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101 if (changeSupport !is null) {
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102 changeSupport.addStaleListener(listener);
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103 }
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104 }
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105
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106 public synchronized void dispose() {
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107 if (changeSupport !is null) {
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108 changeSupport.dispose();
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109 changeSupport = null;
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110 }
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111 }
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112
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113 public Realm getRealm() {
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114 if (changeSupport !is null) {
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115 return changeSupport.getRealm();
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116 }
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117 return null;
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118 }
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119
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120 public bool isStale() {
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121 checkRealm();
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122 return stale;
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123 }
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124
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125 public synchronized void removeChangeListener(IChangeListener listener) {
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126 if (changeSupport !is null) {
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127 changeSupport.removeChangeListener(listener);
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128 }
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129 }
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130
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131 public synchronized void removeStaleListener(IStaleListener listener) {
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132 if (changeSupport !is null) {
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133 changeSupport.removeStaleListener(listener);
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134 }
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135 }
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136
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137 /**
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138 * Sets the stale state. Must be invoked from the current realm.
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139 *
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140 * @param stale
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141 */
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142 public void setStale(bool stale) {
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143 checkRealm();
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144 this.stale = stale;
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145 if (stale) {
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146 fireStale();
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147 }
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148 }
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149
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150 /**
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151 * Fires stale events. Must be invoked from current realm.
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152 */
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153 protected void fireStale() {
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154 checkRealm();
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155 changeSupport.fireEvent(new StaleEvent(this));
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156 }
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157
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158 /**
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159 * Fires change events. Must be invoked from current realm.
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160 */
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161 protected void fireChange() {
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162 checkRealm();
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163 changeSupport.fireEvent(new ChangeEvent(this));
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164 }
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165
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166 /**
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167 * Fires map change events. Must be invoked from current realm.
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168 *
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169 * @param diff
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170 */
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171 protected void fireMapChange(MapDiff diff) {
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172 checkRealm();
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173 changeSupport.fireEvent(new MapChangeEvent(this, diff));
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174 }
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175
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176 /**
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177 * Asserts that the realm is the current realm.
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178 *
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179 * @see Realm#isCurrent()
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180 * @throws AssertionFailedException
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181 * if the realm is not the current realm
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182 */
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183 protected void checkRealm() {
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184 Assert.isTrue(getRealm().isCurrent(),
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185 "This operation must be run within the observable's realm"); //$NON-NLS-1$
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186 }
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187 }