Mercurial > projects > dwt2
annotate org.eclipse.core.databinding.observable/src/org/eclipse/core/internal/databinding/observable/masterdetail/DetailObservableMap.d @ 95:6208d4f6a277
Added trees for databinding.beans and observable
author | Frank Benoit <benoit@tionex.de> |
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date | Tue, 21 Apr 2009 10:55:51 +0200 |
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children | b74ac5dfcc06 |
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1 /******************************************************************************* |
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2 * Copyright (c) 2008 Matthew Hall 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 * Matthew Hall - initial API and implementation (bug 221704) |
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10 * Matthew Hall - bug 223114 |
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11 ******************************************************************************/ |
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12 |
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13 package org.eclipse.core.internal.databinding.observable.masterdetail; |
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14 |
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15 import java.util.Collections; |
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16 import java.util.HashMap; |
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17 import java.util.Map; |
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18 |
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19 import org.eclipse.core.databinding.observable.Diffs; |
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20 import org.eclipse.core.databinding.observable.map.IMapChangeListener; |
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21 import org.eclipse.core.databinding.observable.map.IObservableMap; |
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22 import org.eclipse.core.databinding.observable.map.MapChangeEvent; |
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23 import org.eclipse.core.databinding.observable.map.ObservableMap; |
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24 import org.eclipse.core.databinding.observable.masterdetail.IObservableFactory; |
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25 import org.eclipse.core.databinding.observable.value.IObservableValue; |
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26 import org.eclipse.core.databinding.observable.value.IValueChangeListener; |
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27 import org.eclipse.core.databinding.observable.value.ValueChangeEvent; |
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28 |
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29 /** |
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30 * @since 1.1 |
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31 * |
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32 */ |
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33 public class DetailObservableMap : ObservableMap { |
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34 private bool updating = false; |
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35 |
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36 private IObservableValue master; |
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37 private IObservableFactory detailFactory; |
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38 |
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39 private IObservableMap detailMap; |
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40 |
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41 private IValueChangeListener masterChangeListener = new class() IValueChangeListener { |
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42 public void handleValueChange(ValueChangeEvent event) { |
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43 Map oldMap = new HashMap(wrappedMap); |
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44 updateDetailMap(); |
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45 fireMapChange(Diffs.computeMapDiff(oldMap, wrappedMap)); |
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46 } |
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47 }; |
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48 |
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49 private IMapChangeListener detailChangeListener = new class() IMapChangeListener { |
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50 public void handleMapChange(MapChangeEvent event) { |
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51 if (!updating) { |
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52 fireMapChange(event.diff); |
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53 } |
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54 } |
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55 }; |
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56 |
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57 /** |
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58 * Constructs a new DetailObservableMap |
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59 * |
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60 * @param detailFactory |
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61 * observable factory that creates IObservableMap instances given |
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62 * the current value of master observable value |
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63 * @param master |
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64 * |
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65 */ |
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66 public this(IObservableFactory detailFactory, |
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67 IObservableValue master) { |
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68 super(master.getRealm(), Collections.EMPTY_MAP); |
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69 this.master = master; |
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70 this.detailFactory = detailFactory; |
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71 |
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72 updateDetailMap(); |
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73 master.addValueChangeListener(masterChangeListener); |
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74 } |
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75 |
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76 private void updateDetailMap() { |
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77 Object masterValue = master.getValue(); |
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78 if (detailMap !is null) { |
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79 detailMap.removeMapChangeListener(detailChangeListener); |
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80 detailMap.dispose(); |
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81 } |
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82 |
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83 if (masterValue is null) { |
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84 detailMap = null; |
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85 wrappedMap = Collections.EMPTY_MAP; |
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86 } else { |
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87 detailMap = cast(IObservableMap) detailFactory |
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88 .createObservable(masterValue); |
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89 wrappedMap = detailMap; |
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90 detailMap.addMapChangeListener(detailChangeListener); |
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91 } |
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92 } |
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93 |
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94 public Object put(Object key, Object value) { |
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95 return detailMap.put(key, value); |
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96 } |
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97 |
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98 public void putAll(Map map) { |
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99 detailMap.putAll(map); |
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100 } |
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101 |
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102 public Object remove(Object key) { |
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103 return detailMap.remove(key); |
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104 } |
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105 |
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106 public void clear() { |
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107 detailMap.clear(); |
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108 } |
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109 |
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110 public synchronized void dispose() { |
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111 if (master !is null) { |
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112 master.removeValueChangeListener(masterChangeListener); |
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113 master = null; |
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114 masterChangeListener = null; |
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115 } |
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116 detailFactory = null; |
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117 if (detailMap !is null) { |
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118 detailMap.removeMapChangeListener(detailChangeListener); |
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119 detailMap.dispose(); |
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120 detailMap = null; |
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121 } |
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122 detailChangeListener = null; |
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123 super.dispose(); |
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124 } |
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125 |
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126 } |