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Java > Open Source Codes > com > caucho > jms > util > BytesMessageInputStream


1 /*
2  * Copyright (c) 1998-2006 Caucho Technology -- all rights reserved
3  *
4  * This file is part of Resin(R) Open Source
5  *
6  * Each copy or derived work must preserve the copyright notice and this
7  * notice unmodified.
8  *
9  * Resin Open Source is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License as published by
11  * the Free Software Foundation; either version 2 of the License, or
12  * (at your option) any later version.
13  *
14  * Resin Open Source is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; within even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
17  * of NON-INFRINGEMENT. See the GNU General Public License for more
18  * details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with Resin Open Source; if not, write to the
22  * Free SoftwareFoundation, Inc.
23  * 59 Temple Place, Suite 330
24  * Boston, MA 02111-1307 USA
25  *
26  * @author Emil Ong
27  */
28
29 package com.caucho.jms.util;
30
31 import javax.jms.BytesMessage JavaDoc;
32 import javax.jms.JMSException JavaDoc;
33 import java.io.IOException JavaDoc;
34 import java.io.InputStream JavaDoc;
35 import java.util.logging.Logger JavaDoc;
36
37 /**
38  * An input stream that reads from a BytesMessage.
39  */
40 public class BytesMessageInputStream extends InputStream JavaDoc
41 {
42   protected static Logger JavaDoc log
43     = Logger.getLogger(BytesMessageInputStream.class.getName());
44
45   private BytesMessage JavaDoc _message;
46
47   public BytesMessageInputStream(BytesMessage JavaDoc message)
48   {
49     _message = message;
50   }
51
52   public int read()
53     throws IOException JavaDoc
54   {
55     try {
56       return _message.readByte();
57     } catch (JMSException JavaDoc e) {
58       throw new IOException JavaDoc(e.toString());
59     }
60   }
61
62   public int read(byte[] buffer, int offset, int length)
63     throws IOException JavaDoc
64   {
65     try {
66       if (offset == 0)
67         return _message.readBytes(buffer, length);
68       else
69         return super.read(buffer, offset, length);
70     } catch (JMSException JavaDoc e) {
71       throw new IOException JavaDoc(e.toString());
72     }
73   }
74
75   public int read(byte[] buffer)
76     throws IOException JavaDoc
77   {
78     try {
79       return _message.readBytes(buffer);
80     } catch (JMSException JavaDoc e) {
81       throw new IOException JavaDoc(e.toString());
82     }
83   }
84 }
85
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