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Java > Open Source Codes > org > exolab > jms > message > AbstractMessageConverter


1 /**
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3  * ("Software"), with or without modification, are permitted provided
4  * that the following conditions are met:
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8  * copy of this document.
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12  * following disclaimer in the documentation and/or other
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16  * products derived from this Software without prior written
17  * permission of Exoffice Technologies. For written permission,
18  * please contact info@exolab.org.
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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.
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26  * (http://www.exolab.org/).
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28  * THIS SOFTWARE IS PROVIDED BY EXOFFICE TECHNOLOGIES AND CONTRIBUTORS
29  * ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
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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 2003 (C) Exoffice Technologies Inc. All Rights Reserved.
42  *
43  * $Id: AbstractMessageConverter.java,v 1.1 2004/11/26 01:50:42 tanderson Exp $
44  */
45
46 package org.exolab.jms.message;
47
48 import java.util.Enumeration JavaDoc;
49
50 import javax.jms.Destination JavaDoc;
51 import javax.jms.JMSException JavaDoc;
52 import javax.jms.Message JavaDoc;
53
54 import org.exolab.jms.client.JmsDestination;
55
56
57 /**
58  * Convert messages to OpenJMS implementations
59  *
60  * @version $Revision: 1.1 $ $Date: 2004/11/26 01:50:42 $
61  * @author <a HREF="mailto:tma@netspace.net.au">Tim Anderson</a>
62  * @see MessageConverterFactory
63  */
64 abstract class AbstractMessageConverter implements MessageConverter {
65
66     /**
67      * Convert a message to its corresponding OpenJMS implementation
68      *
69      * @param message the message to convert
70      * @return the converted message
71      * @throws JMSException for any error
72      */
73     public Message JavaDoc convert(Message JavaDoc message) throws JMSException JavaDoc {
74         Message JavaDoc result = create();
75         populate(message, result);
76         return result;
77     }
78
79     /**
80      * Construct an OpenJMS implementation of a message
81      *
82      * @return the OpenJMS implementation of the message
83      * @throws JMSException if the message cannot be created
84      */
85     protected abstract Message JavaDoc create() throws JMSException JavaDoc;
86
87     /**
88      * Populate an OpenJMS message from another message of the same type
89      *
90      * @param source the message to convert
91      * @param target the message to populate
92      * @throws JMSException for any error
93      */
94     protected void populate(Message JavaDoc source, Message JavaDoc target)
95         throws JMSException JavaDoc {
96
97         target.setJMSMessageID(source.getJMSMessageID());
98         target.setJMSDestination(source.getJMSDestination());
99         target.setJMSTimestamp(source.getJMSTimestamp());
100         target.setJMSPriority(source.getJMSPriority());
101         target.setJMSExpiration(source.getJMSExpiration());
102         target.setJMSDeliveryMode(source.getJMSDeliveryMode());
103         target.setJMSCorrelationID(source.getJMSCorrelationID());
104         target.setJMSType(source.getJMSType());
105
106         Destination JavaDoc replyTo = source.getJMSReplyTo();
107         if (replyTo instanceof JmsDestination) {
108             target.setJMSReplyTo(replyTo);
109         }
110         
111         // populate properties
112 Enumeration JavaDoc iterator = source.getPropertyNames();
113         while (iterator.hasMoreElements()) {
114             String JavaDoc name = (String JavaDoc) iterator.nextElement();
115             if (!name.startsWith("JMSX") || name.equals("JMSXGroupID")
116                 || name.equals("JMSXGroupSeq")) {
117                 // only populate user and supported JMSX properties
118
119                 Object JavaDoc value = (Object JavaDoc) source.getObjectProperty(name);
120                 target.setObjectProperty(name, value);
121             }
122         }
123     }
124
125 }
126
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