1 /*
2 * Copyright 2001-2005 (C) MetaStuff, Ltd. All Rights Reserved.
3 *
4 * This software is open source.
5 * See the bottom of this file for the licence.
6 */
7
8 package org.dom4j.util;
9
10 /***
11 * <p>
12 * <code>SingletonStrategy</code> is an interface used to provide common
13 * factory access for the same object based on an implementation strategy for
14 * singleton. Right now there are two that accompany this interface:
15 * SimpleSingleton and PerThreadSingleton. This will replace previous usage of
16 * ThreadLocal to allow for alternate strategies.
17 * </p>
18 *
19 * @author <a href="mailto:ddlucas@users.sourceforge.net">David Lucas </a>
20 * @version $Revision: 1.2 $
21 */
22 public interface SingletonStrategy {
23 /***
24 * return a singleton instance of the class specified in setSingletonClass
25 */
26 Object instance();
27
28 /***
29 * reset the instance to a new instance for the implemented strategy
30 */
31 void reset();
32
33 /***
34 * set a singleton class name that will be used to create the singleton
35 * based on the strategy implementation of this interface. The default
36 * constructor of the class will be used and must be public.
37 */
38 void setSingletonClassName(String singletonClassName);
39 }
40
41 /*
42 * Redistribution and use of this software and associated documentation
43 * ("Software"), with or without modification, are permitted provided that the
44 * following conditions are met:
45 *
46 * 1. Redistributions of source code must retain copyright statements and
47 * notices. Redistributions must also contain a copy of this document.
48 *
49 * 2. Redistributions in binary form must reproduce the above copyright notice,
50 * this list of conditions and the following disclaimer in the documentation
51 * and/or other materials provided with the distribution.
52 *
53 * 3. The name "DOM4J" must not be used to endorse or promote products derived
54 * from this Software without prior written permission of MetaStuff, Ltd. For
55 * written permission, please contact dom4j-info@metastuff.com.
56 *
57 * 4. Products derived from this Software may not be called "DOM4J" nor may
58 * "DOM4J" appear in their names without prior written permission of MetaStuff,
59 * Ltd. DOM4J is a registered trademark of MetaStuff, Ltd.
60 *
61 * 5. Due credit should be given to the DOM4J Project - http://www.dom4j.org
62 *
63 * THIS SOFTWARE IS PROVIDED BY METASTUFF, LTD. AND CONTRIBUTORS ``AS IS'' AND
64 * ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
65 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
66 * ARE DISCLAIMED. IN NO EVENT SHALL METASTUFF, LTD. OR ITS CONTRIBUTORS BE
67 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
68 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
69 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
70 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
71 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
72 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
73 * POSSIBILITY OF SUCH DAMAGE.
74 *
75 * Copyright 2001-2005 (C) MetaStuff, Ltd. All Rights Reserved.
76 */