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annotate org.eclipse.core.databinding.observable/src/org/eclipse/core/internal/databinding/observable/tree/AbstractObservableTree.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, 2007 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 164134
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11 *******************************************************************************/
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12
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13 module org.eclipse.core.internal.databinding.observable.tree.AbstractObservableTree;
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14 import org.eclipse.core.internal.databinding.observable.tree.ITreeChangeListener;
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15 import org.eclipse.core.internal.databinding.observable.tree.TreeChangeEvent;
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16 import org.eclipse.core.internal.databinding.observable.tree.IObservableTree;
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17 import org.eclipse.core.internal.databinding.observable.tree.TreePath;
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18 import org.eclipse.core.internal.databinding.observable.tree.IChildrenCountUpdate;
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19 import org.eclipse.core.internal.databinding.observable.tree.IHasChildrenUpdate;
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20 import org.eclipse.core.internal.databinding.observable.tree.TreeDiff;
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21 import org.eclipse.core.internal.databinding.observable.tree.IChildrenUpdate;
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22
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23 import java.lang.all;
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24
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25 import org.eclipse.core.databinding.observable.AbstractObservable;
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26 import org.eclipse.core.databinding.observable.Realm;
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27 import org.eclipse.core.databinding.util.Policy;
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28 import org.eclipse.core.internal.databinding.BindingMessages;
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29 import org.eclipse.core.runtime.IStatus;
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30 import org.eclipse.core.runtime.ListenerList;
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31 import org.eclipse.core.runtime.Status;
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32
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33 /**
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34 * @since 3.3
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35 *
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36 */
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37 public abstract class AbstractObservableTree : AbstractObservable
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38 , IObservableTree {
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39
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40 private bool stale;
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41
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42 private ListenerList treeListeners = new ListenerListcast(ListenerList.IDENTITY);
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43
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44 /**
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45 * @param realm
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46 */
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47 public this(Realm realm) {
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48 super(realm);
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49 }
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50
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51 public void addChild(TreePath parentPath, Object childElement) {
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52 throw new UnsupportedOperationException();
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53 }
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54
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55 public void addTreeChangeListener(ITreeChangeListener listener) {
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56 treeListeners.add(listener);
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57 }
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58
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59 public int getChildCount(TreePath parentPath) {
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60 return getChildren(parentPath).length;
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61 }
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62
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63 public bool hasChildren(TreePath parentPath) {
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64 return getChildCount(parentPath) > 0;
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65 }
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66
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67 public void insertChild(TreePath parentPath, int index, Object childElement) {
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68 throw new UnsupportedOperationException();
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69 }
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70
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71 public bool isLazy() {
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72 return false;
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73 }
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74
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75 public bool isOrdered() {
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76 return false;
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77 }
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78
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79 public void removeChild(TreePath parentPath, Object childElement) {
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80 throw new UnsupportedOperationException();
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81 }
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82
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83 public void removeChild(TreePath parentPath, int index) {
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84 throw new UnsupportedOperationException();
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85 }
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86
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87 public void removeTreeChangeListener(ITreeChangeListener listener) {
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88 treeListeners.remove(listener);
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89 }
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90
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91 public void setChildCount(TreePath parentPath, int count) {
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92 throw new UnsupportedOperationException();
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93 }
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94
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95 public void setChildren(TreePath parentPath, Object[] children) {
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96 throw new UnsupportedOperationException();
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97 }
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98
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99 public void updateChildren(IChildrenUpdate update) {
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100 TreePath parent = update.getParent();
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101 Object[] children = getChildren(parent);
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102 for (int i = 0; i < update.getLength(); i++) {
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103 int targetIndex = update.getOffset() + i;
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104 if (targetIndex < children.length) {
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105 update.setChild(children[targetIndex], targetIndex);
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106 } else {
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107 update
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108 .setStatus(new Status(
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109 IStatus.WARNING,
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110 Policy.JFACE_DATABINDING,
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111 IStatus.OK,
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112 BindingMessages
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113 .getStringcast(BindingMessages.INDEX_OUT_OF_RANGE),
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114 null));
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115 }
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116 }
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117 update.done();
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118 }
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119
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120 public void updateChildrenCount(IChildrenCountUpdate update) {
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121 TreePath[] parents = update.getParents();
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122 for (int i = 0; i < parents.length; i++) {
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123 update.setChildCount(parents[i], getChildCount(parents[i]));
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124 }
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125 update.done();
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126 }
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127
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128 public void updateHasChildren(IHasChildrenUpdate update) {
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129 TreePath[] parents = update.getElements();
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130 for (int i = 0; i < parents.length; i++) {
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131 update.setHasChilren(parents[i], hasChildren(parents[i]));
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132 }
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133 update.done();
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134 }
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135
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136 public bool isStale() {
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137 return stale;
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138 }
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139
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140 /**
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141 * @param stale
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142 */
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143 public void setStale(bool stale) {
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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 protected void fireTreeChange(TreeDiff diff) {
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151 // fire general change event first
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152 fireChange();
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153
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154 Object[] listeners = treeListeners.getListeners();
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155 TreeChangeEvent event = new TreeChangeEvent(this, diff);
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156 for (int i = 0; i < listeners.length; i++) {
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157 (cast(ITreeChangeListener) listeners[i]).handleTreeChange(event);
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158 }
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159 }
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160
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161 }