1 /***
2 * Copyright (c) 2003 held jointly by the individual authors.
3 *
4 * This library is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU Lesser General Public License as published
6 * by the Free Software Foundation; either version 2.1 of the License, or
7 * (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; with out even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public License
15 * along with this library; if not, write to the Free Software Foundation,
16 * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
17 *
18 * > http://www.gnu.org/copyleft/lesser.html
19 * > http://www.opensource.org/licenses/lgpl-license.php
20 */
21 package net.mlw.gfw.event;
22
23 import java.util.ArrayList;
24 import java.util.Iterator;
25 import java.util.List;
26
27 /*** A PublisherGroup holds meany Publisher(s), and allows
28 * them to be treated as one.
29 *
30 * @author Matthew L. Wilson
31 * @version $Revision: 1.4 $ $Date: 2004/06/29 20:32:57 $
32 */
33 public class EventHandlerList implements EventHandler, EventHandlerContainer
34 {
35 /*** Holds all the publisher. */
36 private List eventHandlers = new ArrayList();
37
38 /*** Adds a EventHandler to the internal List of EventHandlers.
39 *
40 * @param eventHandler The EventHandler to add.
41 */
42 public EventHandler addEventHandler(EventHandler eventHandler)
43 {
44 eventHandlers.add(eventHandler);
45 return eventHandler;
46 }
47
48 /*** Removes the EventHandler from the List.
49 *
50 * @param eventHandler The EventHandler to remove.
51 */
52 public EventHandler removeEventHandler(EventHandler eventHandler)
53 {
54 if(eventHandlers.remove(eventHandler))
55 {
56 return eventHandler;
57 }
58 else
59 {
60 return null;
61 }
62 }
63
64 /*** @see net.mlw.gfw.event.EventHandler#onEvent(net.mlw.gfw.event.Event)
65 */
66 public void onEvent(Event event)
67 {
68 for (Iterator iter = eventHandlers.iterator(); iter.hasNext();)
69 {
70 ((EventHandler) iter.next()).onEvent(event);
71 }
72 }
73
74 /***
75 * @see java.lang.Object#toString()
76 */
77 public String toString()
78 {
79 return eventHandlers.toString();
80 }
81
82 }
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