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annotate org.eclipse.core.databinding.beans/src/org/eclipse/core/internal/databinding/beans/JavaBeanObservableMap.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 48d4ee626868
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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 - bug 223164
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12 *******************************************************************************/
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13
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14 module org.eclipse.core.internal.databinding.beans.JavaBeanObservableMap;
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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.Method;
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22
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23 import org.eclipse.core.databinding.beans.IBeanObservable;
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24 import org.eclipse.core.databinding.observable.Diffs;
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25 import org.eclipse.core.databinding.observable.map.ComputedObservableMap;
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26 import org.eclipse.core.databinding.observable.set.IObservableSet;
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27 import org.eclipse.core.databinding.util.Policy;
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28 import org.eclipse.core.runtime.IStatus;
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29 import org.eclipse.core.runtime.Status;
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30
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31 /**
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32 * @since 1.0
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33 *
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34 */
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35 public class JavaBeanObservableMap : ComputedObservableMap ,
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36 IBeanObservable {
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37
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38 private PropertyDescriptor propertyDescriptor;
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39
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40 private PropertyChangeListener elementListener = new class() PropertyChangeListener {
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41 public void propertyChange(final java.beans.PropertyChangeEvent event) {
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42 if (!updating) {
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43 getRealm().exec(new class() Runnable {
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44 public void run() {
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45 fireMapChange(Diffs.createMapDiffSingleChange(
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46 event.getSource(), event.getOldValue(), event
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47 .getNewValue()));
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48 }
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49 });
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50 }
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51 }
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52 };
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53
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54 private ListenerSupport listenerSupport;
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55
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56 private bool updating = false;
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57
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58 private bool attachListeners;
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59
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60 /**
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61 * @param domain
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62 * @param propertyDescriptor
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63 */
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64 public this(IObservableSet domain,
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65 PropertyDescriptor propertyDescriptor) {
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66 this(domain, propertyDescriptor, true);
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67 }
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68
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69 /**
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70 * @param domain
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71 * @param propertyDescriptor
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72 * @param attachListeners
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73 */
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74 public this(IObservableSet domain,
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75 PropertyDescriptor propertyDescriptor, bool attachListeners) {
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76 super(domain);
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77
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78 this.propertyDescriptor = propertyDescriptor;
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79 this.attachListeners = attachListeners;
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80 if (attachListeners) {
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81 this.listenerSupport = new ListenerSupport(elementListener,
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82 propertyDescriptor.getName());
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83 }
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84 init();
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85 }
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86
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87 protected void hookListener(Object domainElement) {
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88 if (attachListeners && domainElement !is null) {
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89 listenerSupport.hookListener(domainElement);
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90 }
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91 }
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92
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93 protected void unhookListener(Object domainElement) {
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94 if (attachListeners && domainElement !is null) {
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95 listenerSupport.unhookListener(domainElement);
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96 }
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97 }
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98
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99 protected Object doGet(Object key) {
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100 if (key is null) {
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101 return null;
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102 }
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103 try {
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104 Method readMethod = propertyDescriptor.getReadMethod();
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105 if (!readMethod.isAccessible()) {
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106 readMethod.setAccessible(true);
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107 }
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108 return readMethod.invoke(key, new Object[0]);
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109 } catch (Exception e) {
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110 Policy.getLog().log(
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111 new Status(IStatus.ERROR, Policy.JFACE_DATABINDING,
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112 IStatus.ERROR, "cannot get value", e)); //$NON-NLS-1$
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113 throw new RuntimeException(e);
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114 }
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115 }
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116
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117 protected Object doPut(Object key, Object value) {
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118 try {
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119 Object oldValue = get(key);
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120 propertyDescriptor.getWriteMethod().invoke(key,
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121 new Object[] { value });
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122 keySet().add(key);
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123 return oldValue;
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124 } catch (Exception e) {
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125 Policy.getLog().log(
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126 new Status(IStatus.ERROR, Policy.JFACE_DATABINDING,
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127 IStatus.ERROR, "cannot set value", e)); //$NON-NLS-1$
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128 throw new RuntimeException(e);
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129 }
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130 }
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131
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132 /* (non-Javadoc)
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133 * @see org.eclipse.core.databinding.beans.IBeanObservable#getObserved()
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134 */
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135 public Object getObserved() {
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136 return keySet();
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137 }
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138
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139 /* (non-Javadoc)
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140 * @see org.eclipse.core.databinding.beans.IBeanObservable#getPropertyDescriptor()
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141 */
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142 public PropertyDescriptor getPropertyDescriptor() {
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143 return propertyDescriptor;
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144 }
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145 }