blob: 9b069944926871f7991f63f1718f716e4796fb37 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
|
// PipedOutputStream.java - Write bytes to a pipe.
/* Copyright (C) 1998, 1999 Cygnus Solutions
This file is part of libgcj.
This software is copyrighted work licensed under the terms of the
Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
details. */
package java.io;
/**
* @author Tom Tromey <tromey@cygnus.com>
* @date September 24, 1998
*/
/* Written using "Java Class Libraries", 2nd edition, ISBN 0-201-31002-3
* "The Java Language Specification", ISBN 0-201-63451-1
* Status: Believed complete and correct.
*/
public class PipedOutputStream extends OutputStream
{
public void close () throws IOException
{
closed = true;
// Notify PipedInputStream that there is no more data to be had.
destination.receive(-1);
}
public void connect (PipedInputStream dest) throws IOException
{
if (closed)
throw new IOException("pipe closed");
if (destination != null)
if (destination == dest)
return;
else
throw new IOException("pipe already connected");
destination = dest;
try
{
dest.connect(this);
}
catch (IOException ex)
{
destination = null;
throw ex;
}
}
public synchronized void flush () throws IOException
{
// There doesn't seem to be anything to do here.
// TBD: Should this maybe do a notifyAll as a way for the user
// to wake up the input stream to check for bytes to read? Shouldn't
// be necessary but if there aren't any bytes, other threads will just
// go blocak again anyway so it wouldn't hurt.
}
public PipedOutputStream ()
{
closed = false;
}
public PipedOutputStream (PipedInputStream dest) throws IOException
{
closed = false;
connect (dest);
}
public void write (int oneByte) throws IOException
{
if (closed)
throw new IOException ();
destination.receive(oneByte);
}
// This is mentioned in the JCL book, but we don't really need it.
// If there were a corresponding receive() method on
// PipedInputStream then we could get better performance using
// this.
// public void write (byte[] buffer, int offset, int count)
// throws IOException;
// Instance variables.
private PipedInputStream destination;
private boolean closed;
}
|
