Mercurial > projects > dwt2
annotate org.eclipse.core.databinding.beans/src/org/eclipse/core/internal/databinding/beans/JavaBeanObservableSet.d @ 97:c86eb8b3098e
packageimport
author | Frank Benoit <benoit@tionex.de> |
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date | Tue, 21 Apr 2009 11:18:25 +0200 |
parents | b74ac5dfcc06 |
children | 48d4ee626868 |
rev | line source |
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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 171616 |
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11 * Matthew Hall - bugs 221351, 223164, 244098 |
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12 *******************************************************************************/ |
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13 |
96
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14 module org.eclipse.core.internal.databinding.beans.JavaBeanObservableSet; |
97 | 15 import org.eclipse.core.internal.databinding.beans.ListenerSupport; |
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16 |
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17 import java.lang.all; |
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18 |
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19 import java.beans.PropertyChangeListener; |
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20 import java.beans.PropertyDescriptor; |
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21 import java.lang.reflect.Array; |
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22 import java.lang.reflect.InvocationTargetException; |
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23 import java.lang.reflect.Method; |
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24 import java.util.Arrays; |
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25 import java.util.Collection; |
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26 import java.util.Collections; |
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27 import java.util.HashSet; |
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28 import java.util.Iterator; |
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29 import java.util.Set; |
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30 |
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31 import org.eclipse.core.databinding.BindingException; |
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32 import org.eclipse.core.databinding.beans.IBeanObservable; |
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33 import org.eclipse.core.databinding.observable.Diffs; |
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34 import org.eclipse.core.databinding.observable.Realm; |
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35 import org.eclipse.core.databinding.observable.set.ObservableSet; |
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36 import org.eclipse.core.runtime.Assert; |
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37 |
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38 /** |
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39 * @since 1.0 |
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40 * |
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41 */ |
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42 public class JavaBeanObservableSet : ObservableSet , IBeanObservable { |
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43 |
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44 private final Object object; |
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45 |
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46 private bool updating = false; |
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47 |
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48 private PropertyDescriptor descriptor; |
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49 |
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50 private ListenerSupport listenerSupport; |
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51 |
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52 /** |
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53 * @param realm |
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54 * @param object |
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55 * @param descriptor |
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56 * @param elementType |
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57 */ |
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58 public this(Realm realm, Object object, |
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59 PropertyDescriptor descriptor, Class elementType) { |
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60 this(realm, object, descriptor, elementType, true); |
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61 } |
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62 |
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63 /** |
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64 * @param realm |
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65 * @param object |
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66 * @param descriptor |
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67 * @param elementType |
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68 * @param attachListeners |
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69 */ |
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70 public this(Realm realm, Object object, |
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71 PropertyDescriptor descriptor, Class elementType, |
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72 bool attachListeners) { |
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73 super(realm, new HashSet(), elementType); |
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74 this.object = object; |
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75 this.descriptor = descriptor; |
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76 if (attachListeners) { |
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77 PropertyChangeListener listener = new class() PropertyChangeListener { |
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78 public void propertyChange(java.beans.PropertyChangeEvent event) { |
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79 if (!updating) { |
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80 getRealm().exec(new class() Runnable { |
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81 public void run() { |
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82 Set newElements = new HashSet(Arrays |
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83 .asList(getValues())); |
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84 Set addedElements = new HashSet(newElements); |
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85 Set removedElements = new HashSet(wrappedSet); |
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86 // remove all new elements from old elements to |
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87 // compute |
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88 // the removed elements |
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89 removedElements.removeAll(newElements); |
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90 addedElements.removeAll(wrappedSet); |
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91 wrappedSet = newElements; |
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92 fireSetChange(Diffs.createSetDiff( |
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93 addedElements, removedElements)); |
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94 } |
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95 }); |
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96 } |
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97 } |
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98 }; |
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99 this.listenerSupport = new ListenerSupport(listener, descriptor |
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100 .getName()); |
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101 listenerSupport.hookListener(this.object); |
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102 } |
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103 |
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104 wrappedSet.addAll(Arrays.asList(getValues())); |
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105 } |
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106 |
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107 private Object primGetValues() { |
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108 try { |
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109 Method readMethod = descriptor.getReadMethod(); |
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110 if (!readMethod.isAccessible()) { |
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111 readMethod.setAccessible(true); |
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112 } |
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113 return readMethod.invoke(object, new Object[0]); |
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114 } catch (IllegalArgumentException e) { |
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115 } catch (IllegalAccessException e) { |
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116 } catch (InvocationTargetException e) { |
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117 } |
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118 Assert.isTrue(false, "Could not read collection values"); //$NON-NLS-1$ |
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119 return null; |
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120 } |
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121 |
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122 private Object[] getValues() { |
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123 Object[] values = null; |
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124 |
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125 Object result = primGetValues(); |
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126 if (descriptor.getPropertyType().isArray()) |
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127 values = cast(Object[]) result; |
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128 else { |
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129 // TODO add jUnit for POJO (var. SettableValue) collections |
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130 Collection list = cast(Collection) result; |
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131 if (list !is null) |
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132 values = list.toArray(); |
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133 } |
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134 if (values is null) |
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135 values = new Object[0]; |
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136 return values; |
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|
137 } |
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|
138 |
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139 private void setValues() { |
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140 if (descriptor.getPropertyType().isArray()) { |
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141 Class componentType = descriptor.getPropertyType() |
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142 .getComponentType(); |
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143 Object[] newArray = cast(Object[]) Array.newInstance(componentType, |
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144 wrappedSet.size()); |
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145 wrappedSet.toArray(newArray); |
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Frank Benoit <benoit@tionex.de>
parents:
diff
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|
146 primSetValues(newArray); |
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147 } else { |
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148 // assume that it is a java.util.Set |
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149 primSetValues(new HashSet(wrappedSet)); |
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150 } |
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|
151 } |
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152 |
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153 public bool add(Object o) { |
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154 getterCalled(); |
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155 updating = true; |
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156 try { |
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157 bool added = wrappedSet.add(o); |
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158 if (added) { |
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159 setValues(); |
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160 fireSetChange(Diffs.createSetDiff(Collections.singleton(o), |
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161 Collections.EMPTY_SET)); |
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162 } |
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163 return added; |
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164 } finally { |
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165 updating = false; |
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166 } |
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167 } |
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168 |
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169 public bool remove(Object o) { |
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170 getterCalled(); |
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171 updating = true; |
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172 try { |
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173 bool removed = wrappedSet.remove(o); |
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174 if (removed) { |
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175 setValues(); |
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176 fireSetChange(Diffs.createSetDiff(Collections.EMPTY_SET, |
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177 Collections.singleton(o))); |
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178 } |
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179 return removed; |
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180 } finally { |
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181 updating = false; |
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182 } |
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|
183 } |
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184 |
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185 public bool addAll(Collection c) { |
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186 getterCalled(); |
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187 updating = true; |
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188 try { |
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189 Set additions = new HashSet(); |
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190 for (Iterator iterator = c.iterator(); iterator.hasNext();) { |
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191 Object element = iterator.next(); |
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|
192 if (wrappedSet.add(element)) |
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193 additions.add(element); |
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|
194 } |
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195 bool changed = !additions.isEmpty(); |
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|
196 if (changed) { |
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197 setValues(); |
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198 fireSetChange(Diffs.createSetDiff(additions, |
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|
199 Collections.EMPTY_SET)); |
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diff
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|
200 } |
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|
201 return changed; |
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|
202 } finally { |
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diff
changeset
|
203 updating = false; |
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diff
changeset
|
204 } |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
205 } |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
206 |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
207 public bool removeAll(Collection c) { |
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parents:
diff
changeset
|
208 getterCalled(); |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
209 updating = true; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
210 try { |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
211 Set removals = new HashSet(); |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
212 for (Iterator iterator = c.iterator(); iterator.hasNext();) { |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
213 Object element = iterator.next(); |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
214 if (wrappedSet.remove(element)) |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
215 removals.add(element); |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
216 } |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
217 bool changed = !removals.isEmpty(); |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
218 if (changed) { |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
219 setValues(); |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
220 fireSetChange(Diffs.createSetDiff(Collections.EMPTY_SET, |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
221 removals)); |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
222 } |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
223 return changed; |
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parents:
diff
changeset
|
224 } finally { |
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parents:
diff
changeset
|
225 updating = false; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
226 } |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
227 } |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
228 |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
229 public bool retainAll(Collection c) { |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
230 getterCalled(); |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
231 updating = true; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
232 try { |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
233 Set removals = new HashSet(); |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
234 for (Iterator iterator = wrappedSet.iterator(); iterator.hasNext();) { |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
235 Object element = iterator.next(); |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
236 if (!c.contains(element)) { |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
237 iterator.remove(); |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
238 removals.add(element); |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
239 } |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
240 } |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
241 bool changed = !removals.isEmpty(); |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
242 if (changed) { |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
243 setValues(); |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
244 fireSetChange(Diffs.createSetDiff(Collections.EMPTY_SET, |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
245 removals)); |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
246 } |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
247 return changed; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
248 } finally { |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
249 updating = false; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
250 } |
6208d4f6a277
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
251 } |
6208d4f6a277
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
252 |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
253 public void clear() { |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
254 getterCalled(); |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
255 if (wrappedSet.isEmpty()) |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
256 return; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
257 |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
258 updating = true; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
259 try { |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
260 Set removals = new HashSet(wrappedSet); |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
261 wrappedSet.clear(); |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
262 setValues(); |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
263 fireSetChange(Diffs.createSetDiff(Collections.EMPTY_SET, removals)); |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
264 } finally { |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
265 updating = false; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
266 } |
6208d4f6a277
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
267 } |
6208d4f6a277
Added trees for databinding.beans and observable
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
268 |
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Added trees for databinding.beans and observable
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
269 private void primSetValues(Object newValue) { |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
270 Exception ex = null; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
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271 try { |
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272 Method writeMethod = descriptor.getWriteMethod(); |
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273 if (!writeMethod.isAccessible()) { |
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274 writeMethod.setAccessible(true); |
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275 } |
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276 writeMethod.invoke(object, new Object[] { newValue }); |
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277 return; |
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278 } catch (IllegalArgumentException e) { |
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279 ex = e; |
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280 } catch (IllegalAccessException e) { |
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281 ex = e; |
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282 } catch (InvocationTargetException e) { |
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283 ex = e; |
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284 } |
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285 throw new BindingException("Could not write collection values", ex); //$NON-NLS-1$ |
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286 } |
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287 |
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288 public Object getObserved() { |
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289 return object; |
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290 } |
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291 |
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292 public PropertyDescriptor getPropertyDescriptor() { |
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293 return descriptor; |
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294 } |
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295 |
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296 public synchronized void dispose() { |
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297 if (listenerSupport !is null) { |
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298 listenerSupport.dispose(); |
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299 listenerSupport = null; |
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300 } |
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301 |
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302 super.dispose(); |
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303 } |
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304 } |