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 tma@netspace.net.au.
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 2003-2004 (C) Exoffice Technologies Inc. All Rights Reserved.
42 *
43 * $Id: BasicObjectMessage.java,v 1.2 2004/02/02 03:49:55 tanderson Exp $
44 */
45
46 package org.exolab.jmscts.jms.message;
47
48 import java.io.ByteArrayInputStream;
49 import java.io.ByteArrayOutputStream;
50 import java.io.IOException;
51 import java.io.ObjectInputStream;
52 import java.io.ObjectOutputStream;
53 import java.io.Serializable;
54
55 import javax.jms.JMSException;
56 import javax.jms.MessageFormatException;
57 import javax.jms.MessageNotWriteableException;
58 import javax.jms.ObjectMessage;
59
60
61 /***
62 * This class provides a basic implementation of the javax.jms.ObjectMessage
63 * interface.
64 *
65 * @version $Revision: 1.2 $ $Date: 2004/02/02 03:49:55 $
66 * @author <a href="mailto:tma@netspace.net.au">Tim Anderson</a>
67 * @see javax.jms.ObjectMessage
68 */
69 public class BasicObjectMessage extends BasicMessage implements ObjectMessage {
70
71 /***
72 * The byte stream to store data
73 */
74 private byte[] _bytes = null;
75
76 /***
77 * Construct a new <code>BasicObjectMessage</code>
78 */
79 public BasicObjectMessage() {
80 }
81
82 /***
83 * Set the serializable object containing this message's data.
84 * It is important to note that an <code>ObjectMessage</code>
85 * contains a snapshot of the object at the time <code>setObject()</code>
86 * is called - subsequent modifications of the object will have no
87 * affect on the <code>ObjectMessage</code> body.
88 *
89 * @param object the message's data
90 * @throws MessageFormatException if object serialization fails
91 * @throws MessageNotWriteableException if the message is read-only
92 */
93 public final void setObject(Serializable object)
94 throws MessageFormatException, MessageNotWriteableException {
95 checkWrite();
96
97 try {
98 ByteArrayOutputStream byteOut = new ByteArrayOutputStream();
99 ObjectOutputStream out = new ObjectOutputStream(byteOut);
100
101 out.writeObject(object);
102 out.flush();
103 _bytes = byteOut.toByteArray();
104 out.close();
105 } catch (IOException exception) {
106 MessageFormatException error = new MessageFormatException(
107 exception.getMessage());
108 error.setLinkedException(exception);
109 throw error;
110 }
111 }
112
113 /***
114 * Get the serializable object containing this message's data. The
115 * default value is null.
116 *
117 * @return the serializable object containing this message's data
118 *
119 * @throws MessageFormatException if object deserialization fails
120 */
121 public final Serializable getObject() throws MessageFormatException {
122 Serializable result = null;
123 if (_bytes != null) {
124 try {
125 ByteArrayInputStream byteIn =
126 new ByteArrayInputStream(_bytes);
127 ObjectInputStream in = new ObjectInputStream(byteIn);
128
129 result = (Serializable) in.readObject();
130 in.close();
131 } catch (IOException exception) {
132 MessageFormatException error =
133 new MessageFormatException(exception.getMessage());
134 error.setLinkedException(exception);
135 throw error;
136 } catch (ClassNotFoundException exception) {
137 MessageFormatException error =
138 new MessageFormatException(exception.getMessage());
139 error.setLinkedException(exception);
140 throw error;
141 }
142 }
143 return result;
144 }
145
146 /***
147 * Clear out the message body. Clearing a message's body does not clear
148 * its header values or property entries.
149 * If this message body was read-only, calling this method leaves the
150 * message body is in the same state as an empty body in a newly created
151 * message
152 *
153 * @throws JMSException for any error
154 */
155 public final void clearBody() throws JMSException {
156 super.clearBody();
157 _bytes = null;
158 }
159
160 }
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