Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
CollectionSupport |
|
| 0.0;0 |
1 | /* | |
2 | * Copyright (c) 2000 | |
3 | * Jon Schewe. All rights reserved | |
4 | * | |
5 | * Redistribution and use in source and binary forms, with or without | |
6 | * modification, are permitted provided that the following conditions | |
7 | * are met: | |
8 | * 1. Redistributions of source code must retain the above copyright | |
9 | * notice, this list of conditions and the following disclaimer. | |
10 | * 2. Redistributions in binary form must reproduce the above copyright | |
11 | * notice, this list of conditions and the following disclaimer in the | |
12 | * documentation and/or other materials provided with the distribution. | |
13 | * | |
14 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
15 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
16 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
17 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
18 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
19 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
20 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
21 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
22 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
23 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
24 | * SUCH DAMAGE. | |
25 | * | |
26 | * I'd appreciate comments/suggestions on the code jpschewe@mtu.net | |
27 | */ | |
28 | package net.mtu.eggplant.util.event; | |
29 | ||
30 | import java.util.Collection; | |
31 | import java.util.function.BiConsumer; | |
32 | ||
33 | import javax.swing.event.EventListenerList; | |
34 | ||
35 | /** | |
36 | * Adds support for Collection events. | |
37 | * | |
38 | * @version $Revision$ | |
39 | */ | |
40 | public class CollectionSupport { | |
41 | ||
42 | /** | |
43 | * @param source the object that is to be the source of the events | |
44 | * @pre (source != null) | |
45 | **/ | |
46 | 0 | public CollectionSupport(final Object source) { |
47 | 0 | _source = source; |
48 | 0 | _listeners = new EventListenerList(); |
49 | 0 | } |
50 | ||
51 | private Object _source; | |
52 | ||
53 | /** | |
54 | * @param data the objects that were added | |
55 | * @pre (data != null) | |
56 | **/ | |
57 | public void fireObjectsAdded(final Collection<?> data) { | |
58 | 0 | fireObjectsEvent(data, (listener, |
59 | 0 | event) -> listener.objectsAdded(event)); |
60 | ||
61 | 0 | } |
62 | ||
63 | /** | |
64 | * @param data the objects that were removed | |
65 | * @pre (data != null) | |
66 | **/ | |
67 | public void fireObjectsRemoved(final Collection<?> data) { | |
68 | 0 | fireObjectsEvent(data, (listener, |
69 | 0 | event) -> listener.objectsRemoved(event)); |
70 | 0 | } |
71 | ||
72 | private void fireObjectsEvent(final Collection<?> data, | |
73 | BiConsumer<CollectionListener, CollectionEvent> eventCallback) { | |
74 | 0 | final CollectionEvent ce = new CollectionEvent(_source, data); |
75 | 0 | final Object[] listeners = _listeners.getListenerList(); |
76 | 0 | for (int i = listeners.length |
77 | 0 | - 2; i >= 0; i -= 2) { |
78 | 0 | if (listeners[i] == CollectionListener.class) { |
79 | 0 | eventCallback.accept(((CollectionListener) listeners[i |
80 | + 1]), ce); | |
81 | } | |
82 | } | |
83 | 0 | } |
84 | ||
85 | private EventListenerList _listeners; | |
86 | ||
87 | /** | |
88 | * @pre (listener != null) | |
89 | **/ | |
90 | public void addCollectionListener(final CollectionListener listener) { | |
91 | 0 | _listeners.add(CollectionListener.class, listener); |
92 | 0 | } |
93 | ||
94 | /** | |
95 | * @pre (listener != null) | |
96 | **/ | |
97 | public void removeCollectionListener(final CollectionListener listener) { | |
98 | 0 | _listeners.remove(CollectionListener.class, listener); |
99 | 0 | } |
100 | ||
101 | } |