1 //----------------------------------------------------------------------
2 //
3 // PerfectJPattern: "Design patterns are good but components are better!"
4 // ISingleton.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.api.creational.singleton;
22
23 /**
24 * <b>Singleton Design Pattern</b>: Ensure a class has only one instance
25 * and provide a global point of access to it. (Gamma et al, Design Patterns)
26 * <br/><br/>
27 *
28 * <b>Responsibility</b> Singleton: <br/>
29 * <br/>
30 * <ul>
31 * <li>Defines an Instance operation that lets clients access its unique
32 * instance. Instance is a class operation.</li>
33 * <li>Responsible for creating and maintaining its own unique instance.</li>
34 * </ul>
35 *
36 * @author <a href="mailto:bravegag@hotmail.com">Giovanni Azua</a>
37 * @version $Revision: 1.0 $Date: Sep 21, 2008 2:25:28 PM $
38 */
39 public
40 interface ISingleton
41 {
42 // marker interface
43 }