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1   /*
2    * Copyright 2005-2010 the original author or authors.
3    *
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    *
8    *      http://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  
17  package org.springframework.ws.transport.jms;
18  
19  import java.io.IOException;
20  import java.io.InputStream;
21  import javax.jms.BytesMessage;
22  import javax.jms.JMSException;
23  import javax.jms.MessageEOFException;
24  
25  import org.springframework.util.Assert;
26  
27  /**
28   * Input stream that wraps a [email protected] BytesMessage}.
29   *
30   * @author Arjen Poutsma
31   * @since 1.5.0
32   */
33  class BytesMessageInputStream extends InputStream {
34  
35      private final BytesMessage message;
36  
37      BytesMessageInputStream(BytesMessage message) {
38          Assert.notNull(message, "'message' must not be null");
39          this.message = message;
40      }
41  
42      @Override
43      public int read(byte b[]) throws IOException {
44          try {
45              return message.readBytes(b);
46          }
47          catch (JMSException ex) {
48              throw new JmsTransportException(ex);
49          }
50      }
51  
52      @Override
53      public int read(byte b[], int off, int len) throws IOException {
54          if (off == 0) {
55              try {
56                  return message.readBytes(b, len);
57              }
58              catch (JMSException ex) {
59                  throw new JmsTransportException(ex);
60              }
61          }
62          else {
63              return super.read(b, off, len);
64          }
65      }
66  
67      @Override
68      public int read() throws IOException {
69          try {
70              return message.readByte();
71          }
72          catch (MessageEOFException ex) {
73              return -1;
74          }
75          catch (JMSException ex) {
76              throw new JmsTransportException(ex);
77          }
78      }
79  }