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Java > Open Source Codes > org > exolab > jms > client > JmsConnectionFactoryBuilder


1 /**
2  * Redistribution and use of this software and associated documentation
3  * ("Software"), with or without modification, are permitted provided
4  * that the following conditions are met:
5  *
6  * 1. Redistributions of source code must retain copyright
7  * statements and notices. Redistributions must also contain a
8  * copy of this document.
9  *
10  * 2. Redistributions in binary form must reproduce the
11  * above copyright notice, this list of conditions and the
12  * following disclaimer in the documentation and/or other
13  * materials provided with the distribution.
14  *
15  * 3. The name "Exolab" must not be used to endorse or promote
16  * products derived from this Software without prior written
17  * permission of Exoffice Technologies. For written permission,
18  * please contact info@exolab.org.
19  *
20  * 4. Products derived from this Software may not be called "Exolab"
21  * nor may "Exolab" appear in their names without prior written
22  * permission of Exoffice Technologies. Exolab is a registered
23  * trademark of Exoffice Technologies.
24  *
25  * 5. Due credit should be given to the Exolab Project
26  * (http://www.exolab.org/).
27  *
28  * THIS SOFTWARE IS PROVIDED BY EXOFFICE TECHNOLOGIES AND CONTRIBUTORS
29  * ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
30  * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
31  * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
32  * EXOFFICE TECHNOLOGIES OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
33  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
34  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
35  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
36  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
37  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
38  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
39  * OF THE POSSIBILITY OF SUCH DAMAGE.
40  *
41  * Copyright 2001-2005 (C) Exoffice Technologies Inc. All Rights Reserved.
42  *
43  * $Id: JmsConnectionFactoryBuilder.java,v 1.2 2005/03/18 03:36:37 tanderson Exp $
44  */
45 package org.exolab.jms.client;
46
47 import java.util.Enumeration JavaDoc;
48 import java.util.HashMap JavaDoc;
49 import java.util.Hashtable JavaDoc;
50 import javax.naming.Context JavaDoc;
51 import javax.naming.Name JavaDoc;
52 import javax.naming.Reference JavaDoc;
53 import javax.naming.StringRefAddr JavaDoc;
54 import javax.naming.spi.ObjectFactory JavaDoc;
55
56
57 /**
58  * Implementation of the {@link ObjectFactory} interface that creates {@link
59  * JmsConnectionFactory} instances given a corresponding {@link Reference}
60  *
61  * @author <a HREF="mailto:jima@comware.com.au">Jim Alateras</a>
62  * @author <a HREF="mailto:tma@netspace.net.au">Tim Anderson</a>
63  * @version $Revision: 1.2 $ $Date: 2005/03/18 03:36:37 $
64  * @see JmsConnectionFactory
65  * @see JmsXAConnectionFactory
66  */
67 public class JmsConnectionFactoryBuilder
68         implements ObjectFactory JavaDoc {
69
70     /**
71      * Creates an object using the location or reference information specified.
72      * This only constructs
73      *
74      * @param object the object containing location or reference
75      * information that can be used in creating an object.
76      * May be <code>null</code>
77      * @param name the name of this object relative to <code>context</code>,
78      * or <code>null</code> if no name is specified.
79      * @param context the context relative to which the <code>name</code>
80      * parameter is specified, or <code>null</code> if
81      * <code>name</code> is relative to the default initial
82      * context.
83      * @param environment the environment used in creating the object. May be
84      * <code>null</code>
85      * @return the object created oird <code>null</code> if an object can't be
86      * created.
87      * @throws Exception if this object factory encountered an exception while
88      * attempting to create an object, and no other object
89      * factories are to be tried.
90      */
91     public Object JavaDoc getObjectInstance(Object JavaDoc object, Name JavaDoc name, Context JavaDoc context,
92                                     Hashtable JavaDoc environment) throws Exception JavaDoc {
93         Object JavaDoc result = null;
94
95         if (object instanceof Reference JavaDoc) {
96             Reference JavaDoc ref = (Reference JavaDoc) object;
97             String JavaDoc clazz = ref.getClassName();
98
99             if (clazz.equals(JmsConnectionFactory.class.getName())
100                     || clazz.equals(JmsXAConnectionFactory.class.getName())) {
101
102                 StringRefAddr JavaDoc serverClass =
103                         (StringRefAddr JavaDoc) ref.get("serverClass");
104                 String JavaDoc serverClassName = (String JavaDoc) serverClass.getContent();
105                 
106
107                 // get a list of string properties and store them in a
108 // hashtable
109 HashMap JavaDoc properties = new HashMap JavaDoc();
110                 Enumeration JavaDoc iter = ref.getAll();
111                 while (iter.hasMoreElements()) {
112                     StringRefAddr JavaDoc addr = (StringRefAddr JavaDoc) iter.nextElement();
113                     properties.put(addr.getType(), addr.getContent());
114                 }
115
116                 // create the factory
117 if (clazz.equals(JmsConnectionFactory.class.getName())) {
118                     result = new JmsConnectionFactory(serverClassName,
119                                                       properties, environment);
120                 } else {
121                     result = new JmsXAConnectionFactory(serverClassName,
122                                                         properties,
123                                                         environment);
124                 }
125             }
126         }
127         return result;
128     }
129 }
130
131
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