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


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.vfs;
30
31 import java.io.IOException JavaDoc;
32
33 /**
34  * Stream encapsulating System.out.
35  */
36 public class StdoutStream extends StreamImpl {
37   private static StdoutStream _stdout;
38
39   /**
40    * Private, since StdoutStream should always use the create() interface.
41    */
42   private StdoutStream()
43   {
44   }
45
46   /**
47    * Returns the StdoutStream singleton
48    */
49   public static StdoutStream create()
50   {
51     if (_stdout == null) {
52       _stdout = new StdoutStream();
53       ConstPath path = new ConstPath(null, _stdout);
54       path.setScheme("stdout");
55       _stdout.setPath(path);
56     }
57
58     return _stdout;
59   }
60
61   /**
62    * The standard-output stream returns true since it's writable.
63    */
64   public boolean canWrite()
65   {
66     return true;
67   }
68
69   /**
70    * Writes the data to the System.out.
71    *
72    * @param buf the buffer to write.
73    * @param offset starting offset in the buffer.
74    * @param length number of bytes to write.
75    * @param isEnd true when the stream is closing.
76    */
77   public void write(byte []buf, int offset, int length, boolean isEnd)
78     throws IOException JavaDoc
79   {
80     System.out.write(buf, offset, length);
81     System.out.flush();
82   }
83 }
84
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