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Java > Open Source Codes > com > caucho > vfs > i18n > UTF16Writer


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.i18n;
30
31 import com.caucho.vfs.OutputStreamWithBuffer;
32
33 import java.io.IOException JavaDoc;
34
35 /**
36  * Implements an encoding char-to-byte writer for UTF16 and the associated
37  * factory.
38  */
39 public class UTF16Writer extends EncodingWriter {
40   private static final UTF16Writer _writer = new UTF16Writer();
41
42   /**
43    * Null-arg constructor for instantiation by com.caucho.vfs.Encoding only.
44    */
45   public UTF16Writer()
46   {
47   }
48
49   /**
50    * Create a UTF-16 writer using on the WriteStream to send bytes.
51    *
52    * @param javaEncoding the JDK name for the encoding.
53    *
54    * @return the UTF-16 writer.
55    */
56   public EncodingWriter create(String JavaDoc javaEncoding)
57   {
58     return _writer;
59   }
60
61   /**
62    * Writes the character using the correct encoding.
63    */
64   public void write(OutputStreamWithBuffer os, char ch)
65     throws IOException JavaDoc
66   {
67     os.write(ch >> 8);
68     os.write(ch);
69   }
70
71   /**
72    * Writes a character buffer using the UTF-16 encoding.
73    *
74    * @param cbuf character array with the data to write.
75    * @param off starting offset into the character array.
76    * @param len the number of characters to write.
77    */
78   public void write(OutputStreamWithBuffer os, char []cbuf, int off, int len)
79     throws IOException JavaDoc
80   {
81     for (int i = 0; i < len; i++) {
82       char ch = cbuf[off + i];
83
84       os.write(ch >> 8);
85       os.write(ch);
86     }
87   }
88 }
89
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