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Java > Open Source Codes > com > micronova > util > Pipe


1 /*
2
3 Copyright 2003-2007 MicroNova (R)
4 All rights reserved.
5
6 Redistribution and use in source and binary forms, with or
7 without modification, are permitted provided that the following
8 conditions are met:
9
10     * Redistributions of source code must retain the above copyright
11     notice, this list of conditions and the following disclaimer.
12
13     * Redistributions in binary form must reproduce the above copyright
14     notice, this list of conditions and the following disclaimer in the
15     documentation and/or other materials provided with the distribution.
16
17     * Neither the name of MicroNova nor the names of its contributors
18     may be used to endorse or promote products derived from this
19     software without specific prior written permission.
20
21 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
22 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
25 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31 POSSIBILITY OF SUCH DAMAGE.
32
33 */
34
35
36 package com.micronova.util;
37
38 import java.io.*;
39
40 /** I/O pipe (Runnable copying InputStream to OutputStream) */
41
42 public class Pipe implements Runnable JavaDoc
43 {
44     protected OutputStream _outputStream;
45     protected InputStream _inputStream;
46     protected byte[] _buffer;
47     protected boolean _doesCloseStream;
48    
49     public static final int BUFFERSIZE = 1024;
50
51     public Pipe(InputStream inputStream, OutputStream outputStream, boolean doesCloseStream, byte[] buffer)
52     {
53         super();
54
55         _inputStream = inputStream;
56         _outputStream = outputStream;
57
58         if (buffer == null)
59         {
60             buffer = new byte[BUFFERSIZE];
61         }
62
63         _buffer = buffer;
64         _doesCloseStream = doesCloseStream;
65     }
66
67     public Pipe(InputStream inputStream, OutputStream outputStream, boolean doesCloseStream)
68     {
69         this(inputStream, outputStream, doesCloseStream, null);
70     }
71
72     public Pipe(InputStream inputStream, OutputStream outputStream)
73     {
74         this(inputStream, outputStream, true, null);
75     }
76
77     public void run()
78     {
79         InputStream inputStream = _inputStream;
80         OutputStream outputStream = _outputStream;
81
82         try
83         {
84             byte[] buffer = _buffer;
85             int bufferLength = buffer.length;
86         
87             for (;;)
88             {
89                 int readLength = inputStream.read(buffer, 0, bufferLength);
90
91                 if (readLength > 0)
92                 {
93                     outputStream.write(buffer, 0, readLength);
94
95                     outputStream.flush();
96                 }
97                 else
98                 {
99                     break;
100                 }
101             }
102         }
103         catch (Exception JavaDoc e)
104         {
105             e.printStackTrace();
106         }
107         finally
108         {
109             if (_doesCloseStream)
110             {
111                 try
112                 {
113                     outputStream.close();
114                 }
115                 catch (Exception JavaDoc ee)
116                 {
117                 }
118                 
119                 try
120                 {
121                     inputStream.close();
122                 }
123                 catch (Exception JavaDoc ee)
124                 {
125                 }
126             }
127         }
128     }
129 }
130
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