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annotate org.eclipse.core.databinding.observable/src/org/eclipse/core/databinding/observable/set/WritableSet.d @ 97:c86eb8b3098e

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packageimport
author Frank Benoit <benoit@tionex.de>
date Tue, 21 Apr 2009 11:18:25 +0200
parents b74ac5dfcc06
children
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1 /*******************************************************************************
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2 * Copyright (c) 2006-2008 IBM Corporation and others.
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3 * All rights reserved. This program and the accompanying materials
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4 * are made available under the terms of the Eclipse Public License v1.0
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5 * which accompanies this distribution, and is available at
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6 * http://www.eclipse.org/legal/epl-v10.html
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7 *
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8 * Contributors:
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9 * IBM Corporation - initial API and implementation
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10 * Brad Reynolds - bug 147515
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11 * Matthew Hall - bug 221351
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12 *******************************************************************************/
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13
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14 module org.eclipse.core.databinding.observable.set.WritableSet;
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15 import org.eclipse.core.databinding.observable.set.ObservableSet;
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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.util.Collection;
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20 import java.util.Collections;
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21 import java.util.HashSet;
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22 import java.util.Iterator;
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23 import java.util.Set;
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24
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25 import org.eclipse.core.databinding.observable.Diffs;
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26 import org.eclipse.core.databinding.observable.Realm;
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27
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28 /**
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29 * Mutable (writable) implementation of {@link IObservableSet}.
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30 *
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31 * <p>
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32 * This class is thread safe. All state accessing methods must be invoked from
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33 * the {@link Realm#isCurrent() current realm}. Methods for adding and removing
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34 * listeners may be invoked from any thread.
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35 * </p>
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36 *
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37 * @since 1.0
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38 */
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39 public class WritableSet : ObservableSet {
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40
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41 /**
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42 * Constructs a new empty instance in the default realm with a
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43 * <code>null</code> element type.
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44 *
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45 */
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46 public this() {
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47 this(Realm.getDefault());
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48 }
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49
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50 /**
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51 * Constructs a new instance in the default realm containing the
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52 * elements of the given collection. Changes to the given collection after
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53 * calling this method do not affect the contents of the created WritableSet.
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54 *
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55 * @param c
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56 * @param elementType
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57 * can be <code>null</code>
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58 */
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59 public this(Collection c, Object elementType) {
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60 this(Realm.getDefault(), new HashSet(c), elementType);
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61 }
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62
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63 /**
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64 * Constructs a new empty instance in the given realm and a
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65 * <code>null</code> element type.
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66 *
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67 * @param realm
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68 */
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69 public this(Realm realm) {
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70 this(realm, new HashSet(), null);
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71 }
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72
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73 /**
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74 * Constructs a new instance in the default realm with the given element
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75 * type, containing the elements of the given collection. Changes to the
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76 * given collection after calling this method do not affect the contents of
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77 * the created WritableSet.
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78 *
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79 * @param realm
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80 * @param c
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81 * @param elementType
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82 * can be <code>null</code>
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83 */
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84 public this(Realm realm, Collection c, Object elementType) {
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85 super(realm, new HashSet(c), elementType);
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86 this.elementType = elementType;
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87 }
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88
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89 public bool add(Object o) {
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90 getterCalled();
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91 bool added = wrappedSet.add(o);
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92 if (added) {
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93 fireSetChange(Diffs.createSetDiff(Collections.singleton(o), Collections.EMPTY_SET));
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94 }
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95 return added;
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96 }
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97
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98 public bool addAll(Collection c) {
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99 getterCalled();
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100 Set additions = new HashSet();
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101 Iterator it = c.iterator();
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102 while (it.hasNext()) {
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103 Object element = it.next();
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104 if (wrappedSet.add(element)) {
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105 additions.add(element);
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106 }
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107 }
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108 if (additions.size() > 0) {
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109 fireSetChange(Diffs.createSetDiff(additions, Collections.EMPTY_SET));
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110 return true;
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111 }
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112 return false;
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113 }
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114
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115 public bool remove(Object o) {
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116 getterCalled();
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117 bool removed = wrappedSet.remove(o);
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118 if (removed) {
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119 fireSetChange(Diffs.createSetDiff(Collections.EMPTY_SET, Collections
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120 .singleton(o)));
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121 }
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122 return removed;
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123 }
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124
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125 public bool removeAll(Collection c) {
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126 getterCalled();
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127 Set removes = new HashSet();
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128 Iterator it = c.iterator();
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129 while (it.hasNext()) {
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130 Object element = it.next();
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131 if (wrappedSet.remove(element)) {
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132 removes.add(element);
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133 }
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134 }
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135 if (removes.size() > 0) {
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136 fireSetChange(Diffs.createSetDiff(Collections.EMPTY_SET, removes));
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137 return true;
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138 }
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139 return false;
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140 }
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141
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142 public bool retainAll(Collection c) {
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143 getterCalled();
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144 Set removes = new HashSet();
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145 Iterator it = wrappedSet.iterator();
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146 while (it.hasNext()) {
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147 Object element = it.next();
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148 if (!c.contains(element)) {
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149 it.remove();
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150 removes.add(element);
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151 }
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152 }
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153 if (removes.size() > 0) {
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154 fireSetChange(Diffs.createSetDiff(Collections.EMPTY_SET, removes));
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155 return true;
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156 }
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157 return false;
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158 }
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159
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160 public void clear() {
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161 getterCalled();
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162 Set removes = new HashSet(wrappedSet);
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163 wrappedSet.clear();
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164 fireSetChange(Diffs.createSetDiff(Collections.EMPTY_SET, removes));
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165 }
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166
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167 /**
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168 * @param elementType can be <code>null</code>
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169 * @return new instance with the default realm
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170 */
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171 public static WritableSet withElementType(Object elementType) {
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172 return new WritableSet(Realm.getDefault(), new HashSet(), elementType);
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173 }
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174 }