blob: e50a387f3a33c534b3b8fe4175dedee40771689f (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
|
/*******************************************************************************
* Copyright (c) 2007, 2016 Oracle. All rights reserved.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0, which accompanies this distribution
* and is available at http://www.eclipse.org/legal/epl-v10.html.
*
* Contributors:
* Oracle - initial API and implementation
******************************************************************************/
package org.eclipse.jpt.common.utility.internal.model.value;
import org.eclipse.jpt.common.utility.model.Model;
import org.eclipse.jpt.common.utility.model.event.PropertyChangeEvent;
import org.eclipse.jpt.common.utility.model.listener.PropertyChangeAdapter;
import org.eclipse.jpt.common.utility.model.listener.PropertyChangeListener;
import org.eclipse.jpt.common.utility.model.value.PropertyValueModel;
/**
* This {@link AspectPropertyValueModelAdapter} provides basic property change support.
* This converts a set of one or more standard properties into
* a single {@link #VALUE} property.
* <p>
* The typical subclass will override the following methods (see the descriptions
* in {@link AspectPropertyValueModelAdapter}):<ul>
* <li>{@link #buildValue_()}
* <li>{@link #setValue_(Object)}
* <li>{@link #buildValue()}
* <li>{@link #setValue(Object)}
* </ul>
*
* @param <S> the type of the model's subject
* @param <V> the type of the subject's property aspect
*/
public abstract class PropertyAspectAdapterXXXX<S extends Model, V>
extends AspectPropertyValueModelAdapter<S, V>
{
/** The name of the subject's properties that we use for the value. */
protected final String[] aspectNames;
protected static final String[] EMPTY_ASPECT_NAMES = new String[0];
/** A listener that listens to the appropriate properties of the subject. */
protected final PropertyChangeListener aspectChangeListener;
// ********** constructors **********
/**
* Construct a property aspect adapter for the specified subject model
* and property aspects.
*/
protected PropertyAspectAdapterXXXX(PropertyValueModel<? extends S> subjectModel, String aspectName) {
super(subjectModel);
if (aspectName == null) {
throw new NullPointerException();
}
this.aspectNames = new String[] {aspectName};
this.aspectChangeListener = this.buildAspectChangeListener();
}
// ********** initialization **********
protected PropertyChangeListener buildAspectChangeListener() {
return new AspectChangeListener();
}
/**
* Transform the subject's property change events into
* {@link #VALUE} property change events.
*/
protected class AspectChangeListener
extends PropertyChangeAdapter
{
@Override
public void propertyChanged(PropertyChangeEvent event) {
aspectChanged(event);
}
}
// ********** AspectAdapter implementation **********
@Override
protected void engageSubject_() {
for (String propertyName : this.aspectNames) {
this.subject.addPropertyChangeListener(propertyName, this.aspectChangeListener);
}
}
@Override
protected void disengageSubject_() {
for (String propertyName : this.aspectNames) {
this.subject.removePropertyChangeListener(propertyName, this.aspectChangeListener);
}
}
protected void aspectChanged(@SuppressWarnings("unused") PropertyChangeEvent event) {
//TODO we have multiple PropertyAspectAdapters that depend on the aspectChanged()
//behavior because they do a transformation in the buildValue(). It would be
//nice to use the new value from the event instead of rebuilding it.
//this.fireAspectChanged((V) event.getOldValue(), this.value = (V) event.getNewValue());
aspectChanged();
}
}
|
