DelegatingServletInputStream


1   /*
2    * Copyright 2002-2006 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.directwebremoting.util;
18  
19  import java.io.IOException  ;
20  import java.io.InputStream  ;
21  
22  import javax.servlet.ServletInputStream  ;
23  
24  /**
25   * Delegating implementation of ServletInputStream.
26   * @author Joe Walker [joe at getahead dot ltd dot uk]
27   */
28  public class DelegatingServletInputStream extends ServletInputStream  
29  {
30      /**
31       * Create a new DelegatingServletInputStream.
32       * @param proxy the sourceStream InputStream
33       */
34      public DelegatingServletInputStream(InputStream   proxy)
35      {
36          this.proxy = proxy;
37      }
38  
39      /**
40       * Accessor for the stream that we are proxying to
41       * @return The stream we proxy to
42       */
43      public InputStream   getTargetStream()
44      {
45          return proxy;
46      }
47  
48      /**
49       * @return The stream that we proxy to
50       */
51      public InputStream   getSourceStream()
52      {
53          return proxy;
54      }
55  
56      /* (non-Javadoc)
57       * @see java.io.InputStream#read()
58       */
59      public int read() throws IOException  
60      {
61          return proxy.read();
62      }
63  
64      /* (non-Javadoc)
65       * @see java.io.InputStream#close()
66       */
67      public void close() throws IOException  
68      {
69          super.close();
70          proxy.close();
71      }
72  
73      private final InputStream   proxy;
74  }
75
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