DelegatingServletOutputStream


1   /*
2    * Copyright 2005 Joe Walker
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.directwebremoting.util;
18  
19  import java.io.IOException  ;
20  import java.io.OutputStream  ;
21  
22  import javax.servlet.ServletOutputStream  ;
23  
24  /**
25   * Delegating implementation of ServletOutputStream.
26   */
27  public class DelegatingServletOutputStream extends ServletOutputStream  
28  {
29      /**
30       * Create a new DelegatingServletOutputStream.
31       * @param targetStream the target OutputStream
32       */
33      public DelegatingServletOutputStream(OutputStream   targetStream)
34      {
35          this.proxy = targetStream;
36      }
37  
38      /**
39       * Accessor for the stream that we are proxying to
40       * @return The stream we proxy to
41       */
42      public OutputStream   getTargetStream()
43      {
44          return proxy;
45      }
46  
47      /* (non-Javadoc)
48       * @see java.io.OutputStream#write(int)
49       */
50      public void write(int b) throws IOException  
51      {
52          proxy.write(b);
53      }
54  
55      /* (non-Javadoc)
56       * @see java.io.OutputStream#flush()
57       */
58      public void flush() throws IOException  
59      {
60          super.flush();
61          proxy.flush();
62      }
63  
64      /* (non-Javadoc)
65       * @see java.io.OutputStream#close()
66       */
67      public void close() throws IOException  
68      {
69          super.close();
70          proxy.close();
71      }
72  
73      private final OutputStream   proxy;
74  }
75
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