01: /*
02: * Copyright 1990-2007 Sun Microsystems, Inc. All Rights Reserved.
03: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
04: *
05: * This program is free software; you can redistribute it and/or
06: * modify it under the terms of the GNU General Public License version
07: * 2 only, as published by the Free Software Foundation.
08: *
09: * This program is distributed in the hope that it will be useful, but
10: * WITHOUT ANY WARRANTY; without even the implied warranty of
11: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12: * General Public License version 2 for more details (a copy is
13: * included at /legal/license.txt).
14: *
15: * You should have received a copy of the GNU General Public License
16: * version 2 along with this work; if not, write to the Free Software
17: * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
18: * 02110-1301 USA
19: *
20: * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
21: * Clara, CA 95054 or visit www.sun.com if you need additional
22: * information or have any questions.
23: */
24:
25: package com.sun.midp.jump.push.executive;
26:
27: import com.sun.jump.module.JUMPModuleFactory;
28:
29: public abstract class JUMPPushModuleFactory extends JUMPModuleFactory {
30: private static JUMPPushModuleFactory INSTANCE = null;
31:
32: /**
33: * Gets an instance of factory.
34: *
35: * @return instance of factory (cannot be <code>null</code>)
36: */
37: public static JUMPPushModuleFactory getInstance() {
38: return INSTANCE;
39: }
40:
41: /**
42: * Constructor.
43: *
44: * To be used by subclasses only
45: */
46: protected JUMPPushModuleFactory() {
47: synchronized (JUMPPushModuleFactory.class) {
48: if (INSTANCE == null) {
49: INSTANCE = this ;
50: }
51: }
52: }
53:
54: /**
55: * Gets an instance of push module.
56: *
57: * @return an instance of Push module
58: */
59: public abstract JUMPPushModule getPushModule();
60: }
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