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annotate dwtx/jface/resource/ResourceRegistry.d @ 104:04b47443bb01

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Reworked the collection uses to make use of a wrapper collection that is compatible to the Java Collections. These new wrappers now use the tango.util.containers instead of the tango.util.collections.
author Frank Benoit <benoit@tionex.de>
date Thu, 07 Aug 2008 15:01:33 +0200
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1 /*******************************************************************************
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2 * Copyright (c) 2004, 2005 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.resource.ResourceRegistry;
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14
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15
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16 import dwtx.core.commands.common.EventManager;
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17 import dwtx.jface.util.IPropertyChangeListener;
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18 import dwtx.jface.util.PropertyChangeEvent;
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19
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20 import dwt.dwthelper.utils;
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21 import dwtx.dwtxhelper.Collection;
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23 /**
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24 * Abstract base class for various JFace registries.
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25 *
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26 * @since 3.0
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27 */
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28 public abstract class ResourceRegistry : EventManager {
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29
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30 /**
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31 * Adds a property change listener to this registry.
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32 *
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33 * @param listener a property change listener
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34 */
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35 public void addListener(IPropertyChangeListener listener) {
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36 addListenerObject(cast(Object)listener);
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37 }
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38
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39 /**
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40 * Disposes all currently allocated resources.
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41 */
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42 protected abstract void clearCaches();
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43
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44 /**
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45 * @return the set of keys this manager knows about. This collection
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46 * should be immutable.
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47 */
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48 public abstract Set getKeySet();
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49
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50 /**
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51 * Return whether or not the receiver has a value for the supplied key.
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52 *
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53 * @param key the key
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54 * @return <code>true</code> if there is a value for this key
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55 */
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56 public abstract bool hasValueFor(String key);
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57
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58 /**
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59 * Fires a <code>PropertyChangeEvent</code>.
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60 *
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61 * @param name the name of the symbolic value that is changing.
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62 * @param oldValue the old value.
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63 * @param newValue the new value.
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64 */
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65 protected void fireMappingChanged(String name, Object oldValue,
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66 Object newValue) {
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67 Object[] myListeners = getListeners();
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68 if (myListeners.length > 0) {
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69 PropertyChangeEvent event = new PropertyChangeEvent(this, name,
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70 oldValue, newValue);
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71 for (int i = 0; i < myListeners.length; ++i) {
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72 try {
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73 (cast(IPropertyChangeListener) myListeners[i])
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74 .propertyChange(event);
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75 } catch (Exception e) {
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76 // TODO: how to log?
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77 }
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78 }
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79 }
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80 }
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81
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82 /**
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83 * Removes the given listener from this registry. Has no affect if the
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84 * listener is not registered.
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85 *
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86 * @param listener a property change listener
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87 */
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88 public void removeListener(IPropertyChangeListener listener) {
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89 removeListenerObject(cast(Object)listener);
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90 }
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91 }