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comparison org.eclipse.core.databinding/src/org/eclipse/core/internal/databinding/observable/UnmodifiableObservableSet.d @ 78:0a55d2d5a946

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Added file for databinding
author Frank Benoit <benoit@tionex.de>
date Tue, 14 Apr 2009 11:35:29 +0200
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76:f05e6e8b2f2d 78:0a55d2d5a946
1 /*******************************************************************************
2 * Copyright (c) 2007 Matthew Hall and others.
3 * All rights reserved. This program and the accompanying materials
4 * are made available under the terms of the Eclipse Public License v1.0
5 * which accompanies this distribution, and is available at
6 * http://www.eclipse.org/legal/epl-v10.html
7 *
8 * Contributors:
9 * Matthew Hall - initial API and implementation (bug 208332)
10 * Brad Reynolds - initial API and implementation
11 * (through UnmodifiableObservableList.java)
12 ******************************************************************************/
13
14 module org.eclipse.core.internal.databinding.observable.UnmodifiableObservableSet;
15
16 import java.lang.all;
17
18 import org.eclipse.core.databinding.observable.IStaleListener;
19 import org.eclipse.core.databinding.observable.StaleEvent;
20 import org.eclipse.core.databinding.observable.set.IObservableSet;
21 import org.eclipse.core.databinding.observable.set.ISetChangeListener;
22 import org.eclipse.core.databinding.observable.set.ObservableSet;
23 import org.eclipse.core.databinding.observable.set.SetChangeEvent;
24
25 /**
26 * ObservableList implementation that prevents modification by consumers. Events
27 * in the originating wrapped list are propagated and thrown from this instance
28 * when appropriate. All mutators throw an UnsupportedOperationException.
29 *
30 * @since 1.1
31 */
32 public class UnmodifiableObservableSet : ObservableSet {
33 private ISetChangeListener setChangeListener = new class() ISetChangeListener {
34 public void handleSetChange(SetChangeEvent event) {
35 fireSetChange(event.diff);
36 }
37 };
38
39 private IStaleListener staleListener = new class() IStaleListener {
40 public void handleStale(StaleEvent event) {
41 fireStale();
42 }
43 };
44
45 private IObservableSet wrappedSet;
46
47 /**
48 * @param wrappedSet
49 */
50 public this(IObservableSet wrappedSet) {
51 super(wrappedSet.getRealm(), wrappedSet, wrappedSet.getElementType());
52
53 this.wrappedSet = wrappedSet;
54
55 wrappedSet.addSetChangeListener(setChangeListener);
56 wrappedSet.addStaleListener(staleListener);
57 }
58
59 /**
60 * Because this instance is immutable staleness cannot be changed.
61 */
62 public void setStale(bool stale) {
63 throw new UnsupportedOperationException();
64 }
65
66 public bool isStale() {
67 getterCalled();
68 return wrappedSet is null ? false : wrappedSet.isStale();
69 }
70
71 public synchronized void dispose() {
72 if (wrappedSet !is null) {
73 wrappedSet.removeSetChangeListener(setChangeListener);
74 wrappedSet.removeStaleListener(staleListener);
75 wrappedSet = null;
76 }
77 setChangeListener = null;
78 staleListener = null;
79 super.dispose();
80 }
81 }