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Java > Open Source Codes > com > caucho > server > connection > ServletInputStreamImpl


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; without 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 Scott Ferguson
27  */
28
29 package com.caucho.server.connection;
30
31 import javax.servlet.ServletInputStream JavaDoc;
32 import java.io.IOException JavaDoc;
33 import java.io.InputStream JavaDoc;
34
35 public class ServletInputStreamImpl extends ServletInputStream JavaDoc {
36   private InputStream JavaDoc _is;
37
38   public ServletInputStreamImpl()
39   {
40   }
41
42   public void init(InputStream JavaDoc is)
43   {
44     _is = is;
45   }
46
47   public int available() throws IOException JavaDoc
48   {
49     if (_is == null)
50       return -1;
51     else
52       return _is.available();
53   }
54
55   /**
56    * Reads a byte from the input stream.
57    *
58    * @return the next byte or -1 on end of file.
59    */
60   public int read() throws IOException JavaDoc
61   {
62     if (_is == null)
63       return -1;
64     else
65       return _is.read();
66   }
67
68   public int read(byte []buf, int offset, int len) throws IOException JavaDoc
69   {
70     if (_is == null)
71       return -1;
72     else
73       return _is.read(buf, offset, len);
74   }
75
76   public long skip(long n) throws IOException JavaDoc
77   {
78     if (_is == null)
79       return -1;
80     else
81       return _is.skip(n);
82   }
83
84   public void close() throws IOException JavaDoc
85   {
86   }
87
88   public void free()
89   {
90     _is = null;
91   }
92 }
93
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