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annotate org.eclipse.core.databinding.observable/src/org/eclipse/core/databinding/observable/list/AbstractObservableList.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 * Brad Reynolds - bug 164653
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11 * Brad Reynolds - bug 167204
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12 * Matthew Hall - bug 118516
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13 * Matthew Hall - bug 208858
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14 * Matthew Hall - bug 208332
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15 *******************************************************************************/
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16
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17 package org.eclipse.core.databinding.observable.list;
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18
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19 import java.util.AbstractList;
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20 import java.util.Collection;
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21 import java.util.Iterator;
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22
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23 import org.eclipse.core.databinding.observable.ChangeEvent;
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24 import org.eclipse.core.databinding.observable.ChangeSupport;
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25 import org.eclipse.core.databinding.observable.IChangeListener;
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26 import org.eclipse.core.databinding.observable.IStaleListener;
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27 import org.eclipse.core.databinding.observable.ObservableTracker;
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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 * Subclasses should override at least get(int index) and size().
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35 *
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36 * <p>
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37 * This class is thread safe. All state accessing methods must be invoked from
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38 * the {@link Realm#isCurrent() current realm}. Methods for adding and removing
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39 * listeners may be invoked from any thread.
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40 * </p>
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41 *
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42 * @since 1.0
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43 *
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44 */
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45 public abstract class AbstractObservableList : AbstractList ,
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46 IObservableList {
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47
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48 private ChangeSupport changeSupport;
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49
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50 /**
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51 * @param realm
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52 *
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53 */
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54 public this(Realm realm) {
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55 Assert.isNotNull(realm, "Realm cannot be null"); //$NON-NLS-1$
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56 changeSupport = new class(realm) ChangeSupport {
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57 protected void firstListenerAdded() {
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58 this.outer.firstListenerAdded();
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59 }
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60 protected void lastListenerRemoved() {
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61 this.outer.lastListenerRemoved();
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62 }
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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 *
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68 */
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69 public this() {
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70 this(Realm.getDefault());
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71 }
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72
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73 public bool isStale() {
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74 getterCalled();
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75 return false;
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76 }
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77
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78 public synchronized void addListChangeListener(IListChangeListener listener) {
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79 changeSupport.addListener(ListChangeEvent.TYPE, listener);
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80 }
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81
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82 public synchronized void removeListChangeListener(IListChangeListener listener) {
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83 changeSupport.removeListener(ListChangeEvent.TYPE, listener);
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84 }
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85
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86 protected void fireListChange(ListDiff diff) {
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87 // fire general change event first
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88 fireChange();
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89 changeSupport.fireEvent(new ListChangeEvent(this, diff));
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90 }
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91
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92 public synchronized void addChangeListener(IChangeListener listener) {
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93 changeSupport.addChangeListener(listener);
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94 }
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95
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96 public synchronized void removeChangeListener(IChangeListener listener) {
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97 changeSupport.removeChangeListener(listener);
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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 changeSupport.addStaleListener(listener);
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102 }
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103
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104 public synchronized void removeStaleListener(IStaleListener listener) {
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105 changeSupport.removeStaleListener(listener);
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106 }
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107
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108 /**
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109 * Fires change event. Must be invoked from the current realm.
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110 */
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111 protected void fireChange() {
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112 checkRealm();
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113 changeSupport.fireEvent(new ChangeEvent(this));
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114 }
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115
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116 /**
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117 * Fires stale event. Must be invoked from the current realm.
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118 */
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119 protected void fireStale() {
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120 checkRealm();
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121 changeSupport.fireEvent(new StaleEvent(this));
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122 }
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123
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124 /**
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125 *
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126 */
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127 protected void firstListenerAdded() {
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128 }
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129
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130 /**
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131 *
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132 */
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133 protected void lastListenerRemoved() {
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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 */
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139 public synchronized void dispose() {
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140 changeSupport = null;
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141 lastListenerRemoved();
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142 }
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143
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144 public final int size() {
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145 getterCalled();
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146 return doGetSize();
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147 }
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148
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149 /**
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150 * @return the size
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151 */
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152 protected abstract int doGetSize();
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153
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154 /**
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155 *
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156 */
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157 private void getterCalled() {
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158 ObservableTracker.getterCalled(this);
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159 }
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160
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161 public bool isEmpty() {
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162 getterCalled();
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163 return super.isEmpty();
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164 }
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165
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166 public bool contains(Object o) {
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167 getterCalled();
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168 return super.contains(o);
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169 }
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170
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171 public Iterator iterator() {
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172 getterCalled();
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173 final Iterator wrappedIterator = super.iterator();
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174 return new class() Iterator {
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175 public void remove() {
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176 wrappedIterator.remove();
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177 }
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178
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179 public bool hasNext() {
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180 return wrappedIterator.hasNext();
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181 }
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182
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183 public Object next() {
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184 return wrappedIterator.next();
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185 }
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186 };
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187 }
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188
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189 public Object[] toArray() {
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190 getterCalled();
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191 return super.toArray();
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192 }
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193
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194 public Object[] toArray(Object a[]) {
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195 getterCalled();
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196 return super.toArray(a);
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197 }
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198
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199 // Modification Operations
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200
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201 public bool add(Object o) {
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202 getterCalled();
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203 return super.add(o);
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204 }
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205
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206 /**
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207 * Moves the element located at <code>oldIndex</code> to
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208 * <code>newIndex</code>. This method is equivalent to calling
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209 * <code>add(newIndex, remove(oldIndex))</code>.
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210 * <p>
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211 * Subclasses should override this method to deliver list change
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212 * notification for the remove and add operations in the same
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213 * ListChangeEvent, as this allows {@link ListDiff#acceptcast(ListDiffVisitor)}
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214 * to recognize the operation as a move.
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215 *
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216 * @param oldIndex
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217 * the element's position before the move. Must be within the
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218 * range <code>0 &lt;= oldIndex &lt; size()</code>.
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219 * @param newIndex
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220 * the element's position after the move. Must be within the
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221 * range <code>0 &lt;= newIndex &lt; size()</code>.
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222 * @return the element that was moved.
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223 * @throws IndexOutOfBoundsException
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224 * if either argument is out of range (<code>0 &lt;= index &lt; size()</code>).
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225 * @see ListDiffVisitor#handleMove(int, int, Object)
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226 * @see ListDiff#acceptcast(ListDiffVisitor)
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227 * @since 1.1
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228 */
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229 public Object move(int oldIndex, int newIndex) {
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230 checkRealm();
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231 int size = doGetSize();
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232 if (oldIndex < 0 || oldIndex >= size)
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233 throw new IndexOutOfBoundsException(
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234 "oldIndex: " + oldIndex + ", size:" + size); //$NON-NLS-1$ //$NON-NLS-2$
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235 if (newIndex < 0 || newIndex >= size)
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236 throw new IndexOutOfBoundsException(
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237 "newIndex: " + newIndex + ", size:" + size); //$NON-NLS-1$ //$NON-NLS-2$
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238 Object element = remove(oldIndex);
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239 add(newIndex, element);
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240 return element;
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241 }
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242
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243 public bool remove(Object o) {
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244 getterCalled();
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245 return super.remove(o);
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246 }
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247
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248 // Bulk Modification Operations
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249
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250 public bool containsAll(Collection c) {
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251 getterCalled();
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252 return super.containsAll(c);
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253 }
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254
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255 public bool addAll(Collection c) {
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256 getterCalled();
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257 return super.addAll(c);
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258 }
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259
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260 public bool addAll(int index, Collection c) {
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261 getterCalled();
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262 return super.addAll(c);
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263 }
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264
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265 public bool removeAll(Collection c) {
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266 getterCalled();
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267 return super.removeAll(c);
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268 }
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269
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270 public bool retainAll(Collection c) {
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271 getterCalled();
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272 return super.retainAll(c);
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273 }
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274
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275 // Comparison and hashing
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276
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277 public override equals_t opEquals(Object o) {
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278 getterCalled();
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279 return super.equals(o);
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280 }
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281
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282 public override hash_t toHash() {
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283 getterCalled();
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284 return super.hashCode();
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285 }
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286
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287 public int indexOf(Object o) {
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288 getterCalled();
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289 return super.indexOf(o);
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290 }
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291
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292 public int lastIndexOf(Object o) {
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293 getterCalled();
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294 return super.lastIndexOf(o);
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295 }
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296
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297 public Realm getRealm() {
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298 return changeSupport.getRealm();
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299 }
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300
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301 /**
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302 * Asserts that the realm is the current realm.
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303 *
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304 * @see Realm#isCurrent()
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305 * @throws AssertionFailedException
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306 * if the realm is not the current realm
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307 */
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308 protected void checkRealm() {
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309 Assert.isTrue(getRealm().isCurrent(),
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310 "This operation must be run within the observable's realm"); //$NON-NLS-1$
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311 }
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312 }