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


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 java.io.IOException JavaDoc;
32 import java.io.InputStream JavaDoc;
33 import java.io.InputStreamReader JavaDoc;
34 import java.io.Reader JavaDoc;
35 import java.io.UnsupportedEncodingException JavaDoc;
36 import java.nio.charset.Charset JavaDoc;
37
38 /**
39  * Reader to handle any encoding by passing it to the JDK.
40  */
41 public class JDKReader extends EncodingReader {
42   /**
43    * Null-arg constructor for instantiation by com.caucho.vfs.Encoding only.
44    */
45   public JDKReader()
46   {
47   }
48
49   /**
50    * Create a JDK-based reader.
51    *
52    * @param is the input stream providing the bytes.
53    * @param javaEncoding the JDK name for the encoding.
54    *
55    * @return an InputStreamReader
56    */
57   public Reader JavaDoc create(InputStream JavaDoc is, String JavaDoc javaEncoding)
58     throws UnsupportedEncodingException JavaDoc
59   {
60     if (Charset.isSupported(javaEncoding)) {
61       Charset JavaDoc charset = Charset.forName(javaEncoding);
62     
63       return new InputStreamReader JavaDoc(is, charset);
64     }
65     else {
66       // RSN-274, Charset doesn't support all java.io encoding
67 return new InputStreamReader JavaDoc(is, javaEncoding);
68     }
69   }
70
71   /**
72    * Reads into a character buffer using the correct encoding.
73    */
74   public int read()
75     throws IOException JavaDoc
76   {
77     throw new UnsupportedOperationException JavaDoc();
78   }
79 }
80
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