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1 /*******************************************************************************
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2 * Copyright (c) 2004, 2006 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 * Port to the D programming language:
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11 * Frank Benoit <benoit@tionex.de>
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12 *******************************************************************************/
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13 module dwtx.jface.viewers.deferred.SetModel;
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14
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15 import dwtx.jface.viewers.deferred.AbstractConcurrentModel;
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16 import dwtx.jface.viewers.deferred.IConcurrentModelListener;
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17
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18 import tango.util.collection.HashSet;
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19 import tango.util.collection.model.View;
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20
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21 import dwtx.core.runtime.Assert;
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22
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23 import dwt.dwthelper.utils;
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24
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25 /**
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26 * Trivial implementation of an <code>IConcurrentModel</code>. Implements
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27 * an unordered set of elements that fires off change notifications whenever
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28 * elements are added or removed from the set. All notifications are sent
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29 * synchronously.
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30 *
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31 * @since 3.1
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32 */
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33 public class SetModel : AbstractConcurrentModel {
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34
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35 private HashSet!(Object) data;
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36
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37 public this(){
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38 data = new HashSet!(Object);
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39 }
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40
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41 /**
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42 * Return the contents of the model.
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43 * @return the array of elements
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44 *
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45 */
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46 public Object[] getElements() {
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47 return data.toArray();
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48 }
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49
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50 /**
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51 * Sets the contents to the given array of elements
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52 *
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53 * @param newContents new contents of this set
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54 */
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55 public void set(Object[] newContents) {
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56 // Assert.isNotNull(newContents);
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57 data.clear();
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58 for (int i = 0; i < newContents.length; i++) {
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59 Object object = newContents[i];
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60
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61 data.add(object);
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62 }
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63
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64 IConcurrentModelListener[] listeners = getListeners();
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65 foreach( listener; listeners ){
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66 listener.setContents(newContents);
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67 }
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68 }
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69
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70 /**
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71 * Empties the set
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72 */
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73 public void clear() {
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74 Object[] removed = data.toArray();
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75 data.clear();
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76 fireRemove(removed);
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77 }
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78
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79 /**
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80 * Adds the given elements to the set
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81 *
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82 * @param toAdd elements to add
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83 */
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84 public void addAll(Object[] toAdd) {
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85 // Assert.isNotNull(toAdd);
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86 for (int i = 0; i < toAdd.length; i++) {
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87 Object object = toAdd[i];
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88
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89 data.add(object);
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90 }
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91
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92 fireAdd(toAdd);
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93 }
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94
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95 /**
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96 * Adds the given elements to the set. Duplicate elements are ignored.
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97 *
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98 * @param toAdd elements to add
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99 */
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100 public void addAll(View!(Object) toAdd) {
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101 Assert.isNotNull(cast(Object)toAdd);
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102 addAll(toAdd.toArray());
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103 }
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104
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105 /**
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106 * Fires a change notification for all elements in the given array
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107 *
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108 * @param changed array of elements that have changed
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109 */
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110 public void changeAll(Object[] changed) {
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111 // Assert.isNotNull(changed);
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112 fireUpdate(changed);
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113 }
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114
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115 /**
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116 * Removes all of the given elements from the set.
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117 *
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118 * @param toRemove elements to remove
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119 */
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120 public void removeAll(Object[] toRemove) {
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121 // Assert.isNotNull(toRemove);
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122 for (int i = 0; i < toRemove.length; i++) {
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123 Object object = toRemove[i];
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124
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125 data.remove(object);
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126 }
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127
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128 fireRemove(toRemove);
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129 }
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130
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131 /* (non-Javadoc)
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132 * @see dwtx.jface.viewers.deferred.IConcurrentModel#requestUpdate(dwtx.jface.viewers.deferred.IConcurrentModelListener)
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133 */
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134 public void requestUpdate(IConcurrentModelListener listener) {
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135 Assert.isNotNull(cast(Object)listener);
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136 listener.setContents(getElements());
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137 }
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138 }
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