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Java > Open Source Codes > com > caucho > vfs > StderrStream


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  *
23  * Free Software Foundation, Inc.
24  * 59 Temple Place, Suite 330
25  * Boston, MA 02111-1307 USA
26  *
27  * @author Scott Ferguson
28  */
29
30 package com.caucho.vfs;
31
32 import java.io.IOException JavaDoc;
33
34 /**
35  * Stream encapsulating System.err.
36  */
37 public class StderrStream extends StreamImpl {
38   private static StderrStream _stderr;
39
40   private StderrStream()
41   {
42   }
43
44   /**
45    * Returns the StderrStream singleton
46    */
47   public static StderrStream create()
48   {
49     if (_stderr == null) {
50       _stderr = new StderrStream();
51       ConstPath path = new ConstPath(null, _stderr);
52       path.setScheme("stderr");
53       _stderr.setPath(path);
54     }
55
56     return _stderr;
57   }
58
59   /**
60    * The standard error stream returns true since it's writable.
61    */
62   public boolean canWrite()
63   {
64     return true;
65   }
66
67   /**
68    * Writes the data to the System.out.
69    *
70    * @param buf the buffer to write.
71    * @param offset starting offset in the buffer.
72    * @param length number of bytes to write.
73    * @param isEnd true when the stream is closing.
74    */
75   public void write(byte []buf, int offset, int length, boolean isEnd)
76     throws IOException JavaDoc
77   {
78     System.err.write(buf, offset, length);
79     System.err.flush();
80   }
81 }
82
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