1 //----------------------------------------------------------------------
2 //
3 // PerfectJPattern: "Design patterns are good but components are better!"
4 // ParameterlessSubject.java Copyright (c) 2009 Giovanni Azua Garcia
5 // bravegag@hotmail.com
6 //
7 // This program is free software; you can redistribute it and/or
8 // modify it under the terms of the GNU General Public License
9 // as published by the Free Software Foundation; either version 3
10 // of the License, or (at your option) any later version.
11 //
12 // This program is distributed in the hope that it will be useful,
13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 // GNU General Public License for more details.
16 //
17 // You should have received a copy of the GNU General Public License
18 // along with this program; if not, see <http://www.gnu.org/licenses/>.
19 //
20 //----------------------------------------------------------------------
21 package org.perfectjpattern.core.behavioral.observer;
22
23 import org.perfectjpattern.core.api.behavioral.observer.*;
24 import org.perfectjpattern.core.api.behavioral.observer.data.*;
25
26 /**
27 * Convenience {@link ISubject} implementation for cases where the event has no
28 * {@link IEventData} associated
29 *
30 * @author <a href="mailto:bravegag@hotmail.com">Giovanni Azua</a>
31 * @version $Revision: 1.0 $Date: Feb 13, 2009 9:56:55 PM $
32 */
33 public
34 class ParameterlessSubject
35 extends Subject<NullEventData>
36 implements IParameterlessSubject
37 {
38 //------------------------------------------------------------------------
39 // public
40 //------------------------------------------------------------------------
41 /**
42 * {@inheritDoc}
43 */
44 public void
45 notifyObservers()
46 {
47 super.notifyObservers(NullEventData.getInstance());
48 }
49 }