Mercurial > projects > dwt2
annotate org.eclipse.core.databinding.observable/src/org/eclipse/core/databinding/observable/map/WritableMap.d @ 96:b74ac5dfcc06
package to module and java.lang.all import
author | Frank Benoit <benoit@tionex.de> |
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date | Tue, 21 Apr 2009 11:03:33 +0200 |
parents | 6208d4f6a277 |
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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 * Matthew Hall - bug 184830 |
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12 *******************************************************************************/ |
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13 |
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14 module org.eclipse.core.databinding.observable.map.WritableMap; |
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15 |
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16 import java.lang.all; |
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17 |
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18 import java.util.Collections; |
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19 import java.util.HashMap; |
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20 import java.util.HashSet; |
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21 import java.util.Iterator; |
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22 import java.util.Map; |
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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 import org.eclipse.core.internal.databinding.Util; |
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28 |
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29 /** |
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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 * @since 1.0 |
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37 */ |
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38 public class WritableMap : ObservableMap { |
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39 |
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40 /** |
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41 * Constructs a new WritableMap on the default realm. |
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42 */ |
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43 public this() { |
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44 this(Realm.getDefault()); |
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45 } |
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46 |
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47 /** |
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48 * Constructs a new WritableMap on the given realm. |
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49 * |
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50 * @param realm |
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51 * the realm |
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52 */ |
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53 public this(Realm realm) { |
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54 super(realm, new HashMap()); |
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55 } |
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56 |
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57 /** |
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58 * Associates the provided <code>value</code> with the <code>key</code>. Must be invoked from the current realm. |
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59 */ |
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60 public Object put(Object key, Object value) { |
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61 checkRealm(); |
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62 Object result = wrappedMap.put(key, value); |
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63 if (!Util.equals(result, value)) { |
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64 if (resultisnull) { |
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65 fireMapChange(Diffs.createMapDiffSingleAdd(key, value)); |
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66 } else { |
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67 fireMapChange(Diffs.createMapDiffSingleChange(key, result, |
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68 value)); |
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69 } |
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70 } |
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71 return result; |
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72 } |
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73 |
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74 /** |
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75 * Removes the value with the provide <code>key</code>. Must be invoked from the current realm. |
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76 */ |
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77 public Object remove(Object key) { |
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78 checkRealm(); |
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79 Object result = wrappedMap.remove(key); |
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80 if (result!isnull) { |
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81 fireMapChange(Diffs.createMapDiffSingleRemove(key, result)); |
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82 } |
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83 return result; |
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84 } |
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85 |
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86 /** |
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87 * Clears the map. Must be invoked from the current realm. |
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88 */ |
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89 public void clear() { |
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90 checkRealm(); |
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91 if (!isEmpty()) { |
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92 Map copy = new HashMap(wrappedMap); |
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93 wrappedMap.clear(); |
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94 fireMapChange(Diffs.createMapDiffRemoveAll(copy)); |
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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 * Adds the provided <code>map</code>'s contents to this map. Must be invoked from the current realm. |
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100 */ |
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101 public void putAll(Map map) { |
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102 checkRealm(); |
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103 Set addedKeys = new HashSet(map.size()); |
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104 Map changes = new HashMap(map.size()); |
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105 for (Iterator it = map.entrySet().iterator(); it.hasNext();) { |
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106 Map.Entry entry = cast(Entry) it.next(); |
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107 Object previousValue = wrappedMap.put(entry.getKey(), entry.getValue()); |
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108 if (previousValueisnull) { |
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109 addedKeys.add(entry.getKey()); |
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110 } else { |
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111 changes.put(entry.getKey(), previousValue); |
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112 } |
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113 } |
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114 if (!addedKeys.isEmpty() || !changes.isEmpty()) { |
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115 fireMapChange(Diffs.createMapDiff(addedKeys, Collections.EMPTY_SET, changes.keySet(), changes, wrappedMap)); |
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116 } |
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117 } |
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118 |
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119 } |