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Java > Open Source Codes > com > caucho > xml2 > readers > Utf16Reader


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.xml2.readers;
30
31 import com.caucho.vfs.ReadStream;
32 import com.caucho.xml2.XmlParser;
33
34 import java.io.IOException JavaDoc;
35
36 /**
37  * A fast reader to convert bytes to characters for parsing XML.
38  */
39 public class Utf16Reader extends XmlReader {
40   boolean isReverse;
41   /**
42    * Create a new reader.
43    */
44   public Utf16Reader()
45   {
46   }
47
48   /**
49    * Create a new reader with the given read stream.
50    */
51   public Utf16Reader(XmlParser parser, ReadStream is)
52   {
53     super(parser, is);
54   }
55
56   public void setReverse(boolean isReverse)
57   {
58     this.isReverse = isReverse;
59   }
60
61   public boolean getReverse()
62   {
63     return isReverse;
64   }
65
66   /**
67    * Read the next character, returning -1 on end of file..
68    */
69   public int read()
70     throws IOException JavaDoc
71   {
72     int ch1 = _is.read();
73     int ch2 = _is.read();
74
75     if (ch2 < 0) {
76       return -1;
77     }
78     else if (isReverse)
79       return (ch2 << 8) + ch1;
80     else
81       return (ch1 << 8) + ch2;
82   }
83 }
84
85
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