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annotate org.eclipse.core.databinding.observable/src/org/eclipse/core/databinding/observable/list/ObservableList.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 - bugs 164653, 167204
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11 * Matthew Hall - bugs 208858, 208332, 245183
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12 * Tom Schindl - bug 245183
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13 *******************************************************************************/
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14
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15 module org.eclipse.core.databinding.observable.list.ObservableList;
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16 import org.eclipse.core.databinding.observable.list.IListChangeListener;
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17 import org.eclipse.core.databinding.observable.list.AbstractObservableList;
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18 import org.eclipse.core.databinding.observable.list.ListChangeEvent;
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19 import org.eclipse.core.databinding.observable.list.ListDiff;
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20 import org.eclipse.core.databinding.observable.list.IObservableList;
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21
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22 import java.lang.all;
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23
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24 import java.util.Collection;
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25 import java.util.Iterator;
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26 import java.util.List;
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27 import java.util.ListIterator;
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28
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29 import org.eclipse.core.databinding.observable.AbstractObservable;
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30 import org.eclipse.core.databinding.observable.Diffs;
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31 import org.eclipse.core.databinding.observable.ObservableTracker;
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32 import org.eclipse.core.databinding.observable.Realm;
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33
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34 /**
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35 *
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36 * Abstract implementation of {@link IObservableList}, based on an underlying regular list.
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37 * <p>
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38 * This class is thread safe. All state accessing methods must be invoked from
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39 * the {@link Realm#isCurrent() current realm}. Methods for adding and removing
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40 * listeners may be invoked from any thread.
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41 * </p>
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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 ObservableList : AbstractObservable ,
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46 IObservableList {
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47
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48 protected List wrappedList;
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49
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50 /**
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51 * Stale state of the list. Access must occur in the current realm.
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52 */
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53 private bool stale = false;
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54
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55 private Object elementType;
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56
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57 protected this(List wrappedList, Object elementType) {
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58 this(Realm.getDefault(), wrappedList, elementType);
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59 }
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60
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61 protected this(Realm realm, List wrappedList, Object elementType) {
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62 super(realm);
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63 this.wrappedList = wrappedList;
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64 this.elementType = elementType;
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65 }
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66
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67 public synchronized void addListChangeListener(IListChangeListener listener) {
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68 addListener(ListChangeEvent.TYPE, listener);
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69 }
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70
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71 public synchronized void removeListChangeListener(IListChangeListener listener) {
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72 removeListener(ListChangeEvent.TYPE, listener);
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73 }
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74
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75 protected void fireListChange(ListDiff diff) {
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76 // fire general change event first
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77 super.fireChange();
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78 fireEvent(new ListChangeEvent(this, diff));
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79 }
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80
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81 public bool contains(Object o) {
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82 getterCalled();
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83 return wrappedList.contains(o);
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84 }
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85
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86 public bool containsAll(Collection c) {
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87 getterCalled();
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88 return wrappedList.containsAll(c);
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89 }
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90
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91 public override equals_t opEquals(Object o) {
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92 getterCalled();
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93
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94 if (o is this)
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95 return true;
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96 if (o is null)
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97 return false;
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98 if (getClass() is o.getClass()) {
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99 return wrappedList.equals((cast(ObservableList) o).wrappedList);
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100 }
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101
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102 return wrappedList.equals(o);
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103 }
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104
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105 public override hash_t toHash() {
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106 getterCalled();
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107 return wrappedList.hashCode();
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108 }
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109
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110 public bool isEmpty() {
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111 getterCalled();
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112 return wrappedList.isEmpty();
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113 }
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114
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115 public Iterator iterator() {
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116 getterCalled();
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117 final Iterator wrappedIterator = wrappedList.iterator();
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118 return new class() Iterator {
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119
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120 public void remove() {
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121 throw new UnsupportedOperationException();
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122 }
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123
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124 public bool hasNext() {
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125 return wrappedIterator.hasNext();
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126 }
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127
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128 public Object next() {
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129 return wrappedIterator.next();
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130 }
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131 };
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132 }
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133
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134 public int size() {
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135 getterCalled();
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136 return wrappedList.size();
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137 }
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138
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139 public Object[] toArray() {
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140 getterCalled();
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141 return wrappedList.toArray();
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142 }
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143
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144 public Object[] toArray(Object[] a) {
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145 getterCalled();
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146 return wrappedList.toArray(a);
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147 }
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148
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149 public String toString() {
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150 getterCalled();
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151 return wrappedList.toString();
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152 }
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153
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154 /**
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155 * @TrackedGetter
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156 */
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157 public Object get(int index) {
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158 getterCalled();
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159 return wrappedList.get(index);
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160 }
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161
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162 /**
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163 * @TrackedGetter
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164 */
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165 public int indexOf(Object o) {
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166 getterCalled();
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167 return wrappedList.indexOf(o);
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168 }
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169
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170 /**
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171 * @TrackedGetter
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172 */
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173 public int lastIndexOf(Object o) {
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174 getterCalled();
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175 return wrappedList.lastIndexOf(o);
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176 }
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177
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178 // List Iterators
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179
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180 /**
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181 * @TrackedGetter
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182 */
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183 public ListIterator listIterator() {
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184 return listIterator(0);
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185 }
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186
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187 /**
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188 * @TrackedGetter
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189 */
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190 public ListIterator listIterator(int index) {
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191 getterCalled();
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192 final ListIterator wrappedIterator = wrappedList.listIterator(index);
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193 return new class() ListIterator {
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194
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195 public int nextIndex() {
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196 return wrappedIterator.nextIndex();
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197 }
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198
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199 public int previousIndex() {
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200 return wrappedIterator.previousIndex();
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201 }
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202
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203 public void remove() {
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204 throw new UnsupportedOperationException();
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205 }
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206
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207 public bool hasNext() {
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208 return wrappedIterator.hasNext();
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209 }
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210
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211 public bool hasPrevious() {
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212 return wrappedIterator.hasPrevious();
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213 }
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214
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215 public Object next() {
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216 return wrappedIterator.next();
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217 }
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218
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219 public Object previous() {
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220 return wrappedIterator.previous();
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221 }
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222
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223 public void add(Object o) {
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224 throw new UnsupportedOperationException();
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225 }
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226
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227 public void set(Object o) {
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228 throw new UnsupportedOperationException();
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229 }
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230 };
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231 }
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232
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233
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234 public List subList(final int fromIndex, final int toIndex) {
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235 getterCalled();
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236 if (fromIndex < 0 || fromIndex > toIndex || toIndex > size()) {
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237 throw new IndexOutOfBoundsException();
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238 }
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239 return new AbstractObservableList(getRealm()) {
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240
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241 public Object getElementType() {
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242 return this.outer.getElementType();
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243 }
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244
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245 public Object get(int location) {
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246 return this.outer.get(fromIndex + location);
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247 }
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248
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249 protected int doGetSize() {
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250 return toIndex - fromIndex;
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251 }
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252 };
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253 }
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254
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255 protected void getterCalled() {
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256 ObservableTracker.getterCalled(this);
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257 }
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258
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259 public Object set(int index, Object element) {
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260 throw new UnsupportedOperationException();
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261 }
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262
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263 /**
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264 * Moves the element located at <code>oldIndex</code> to
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265 * <code>newIndex</code>. This method is equivalent to calling
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266 * <code>add(newIndex, remove(oldIndex))</code>.
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267 * <p>
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268 * Subclasses should override this method to deliver list change
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269 * notification for the remove and add operations in the same
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270 * ListChangeEvent, as this allows {@link ListDiff#acceptcast(ListDiffVisitor)}
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271 * to recognize the operation as a move.
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272 *
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273 * @param oldIndex
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274 * the element's position before the move. Must be within the
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275 * range <code>0 &lt;= oldIndex &lt; size()</code>.
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276 * @param newIndex
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277 * the element's position after the move. Must be within the
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278 * range <code>0 &lt;= newIndex &lt; size()</code>.
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279 * @return the element that was moved.
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280 * @throws IndexOutOfBoundsException
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281 * if either argument is out of range (<code>0 &lt;= index &lt; size()</code>).
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282 * @see ListDiffVisitor#handleMove(int, int, Object)
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283 * @see ListDiff#acceptcast(ListDiffVisitor)
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284 * @since 1.1
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285 */
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286 public Object move(int oldIndex, int newIndex) {
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287 checkRealm();
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288 int size = wrappedList.size();
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289 if (oldIndex < 0 || oldIndex >= size)
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290 throw new IndexOutOfBoundsException(
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291 "oldIndex: " + oldIndex + ", size:" + size); //$NON-NLS-1$ //$NON-NLS-2$
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292 if (newIndex < 0 || newIndex >= size)
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293 throw new IndexOutOfBoundsException(
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294 "newIndex: " + newIndex + ", size:" + size); //$NON-NLS-1$ //$NON-NLS-2$
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295 Object element = remove(oldIndex);
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296 add(newIndex, element);
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297 return element;
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298 }
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299
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300 public Object remove(int index) {
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301 throw new UnsupportedOperationException();
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302 }
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303
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304 public bool add(Object o) {
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305 throw new UnsupportedOperationException();
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306 }
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307
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308 public void add(int index, Object element) {
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309 throw new UnsupportedOperationException();
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310 }
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311
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312 public bool addAll(Collection c) {
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313 throw new UnsupportedOperationException();
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314 }
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315
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316 public bool addAll(int index, Collection c) {
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317 throw new UnsupportedOperationException();
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318 }
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319
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320 public bool remove(Object o) {
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321 throw new UnsupportedOperationException();
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322 }
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323
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324 public bool removeAll(Collection c) {
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325 throw new UnsupportedOperationException();
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326 }
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327
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328 public bool retainAll(Collection c) {
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329 throw new UnsupportedOperationException();
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330 }
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331
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332 public void clear() {
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333 throw new UnsupportedOperationException();
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334 }
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335
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336 /**
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337 * Returns the stale state. Must be invoked from the current realm.
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338 *
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339 * @return stale state
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340 */
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341 public bool isStale() {
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342 getterCalled();
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343 return stale;
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344 }
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345
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346 /**
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347 * Sets the stale state. Must be invoked from the current realm.
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348 *
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349 * @param stale
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350 * The stale state to list. This will fire a stale event if the
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351 * given bool is true and this observable list was not already
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352 * stale.
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353 */
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354 public void setStale(bool stale) {
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355 checkRealm();
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356
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357 bool wasStale = this.stale;
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358 this.stale = stale;
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359 if (!wasStale && stale) {
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360 fireStale();
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361 }
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362 }
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363
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364 protected void fireChange() {
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365 throw new RuntimeException("fireChange should not be called, use fireListChange() instead"); //$NON-NLS-1$
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366 }
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367
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368 /* (non-Javadoc)
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369 * @see org.eclipse.jface.provisional.databinding.observable.AbstractObservable#dispose()
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370 */
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371 public synchronized void dispose() {
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372 super.dispose();
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373 }
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374
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375 public Object getElementType() {
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376 return elementType;
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377 }
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378
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379 protected void updateWrappedList(List newList) {
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380 List oldList = wrappedList;
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381 ListDiff listDiff = Diffs.computeListDiff(oldList, newList);
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382 wrappedList = newList;
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383 fireListChange(listDiff);
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384 }
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385
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386 }