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Java > Open Source Codes > org > enhydra > apache > xerces > readers > UCSRecognizer


1 /*
2  * The Apache Software License, Version 1.1
3  *
4  *
5  * Copyright (c) 1999 The Apache Software Foundation. All rights
6  * reserved.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  *
12  * 1. Redistributions of source code must retain the above copyright
13  * notice, this list of conditions and the following disclaimer.
14  *
15  * 2. Redistributions in binary form must reproduce the above copyright
16  * notice, this list of conditions and the following disclaimer in
17  * the documentation and/or other materials provided with the
18  * distribution.
19  *
20  * 3. The end-user documentation included with the redistribution,
21  * if any, must include the following acknowledgment:
22  * "This product includes software developed by the
23  * Apache Software Foundation (http://www.apache.org/)."
24  * Alternately, this acknowledgment may appear in the software itself,
25  * if and wherever such third-party acknowledgments normally appear.
26  *
27  * 4. The names "Xerces" and "Apache Software Foundation" must
28  * not be used to endorse or promote products derived from this
29  * software without prior written permission. For written
30  * permission, please contact apache@apache.org.
31  *
32  * 5. Products derived from this software may not be called "Apache",
33  * nor may "Apache" appear in their name, without prior written
34  * permission of the Apache Software Foundation.
35  *
36  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
37  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
38  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
39  * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
40  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
41  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
42  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
43  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
44  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
45  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
46  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
47  * SUCH DAMAGE.
48  * ====================================================================
49  *
50  * This software consists of voluntary contributions made by many
51  * individuals on behalf of the Apache Software Foundation and was
52  * originally based on software copyright (c) 1999, International
53  * Business Machines, Inc., http://www.apache.org. For more
54  * information on the Apache Software Foundation, please see
55  * <http://www.apache.org/>.
56  */
57
58 package org.enhydra.apache.xerces.readers;
59
60 import org.enhydra.apache.xerces.framework.XMLErrorReporter;
61 import org.enhydra.apache.xerces.utils.ChunkyByteArray;
62 import org.enhydra.apache.xerces.utils.StringPool;
63
64 /**
65  *
66  * @version
67  */
68 final class UCSRecognizer extends XMLDeclRecognizer {
69     //
70 //
71 //
72 public XMLEntityHandler.EntityReader recognize(XMLEntityReaderFactory readerFactory,
73                                                    XMLEntityHandler entityHandler,
74                                                    XMLErrorReporter errorReporter,
75                                                    boolean sendCharDataAsCharArray,
76                                                    StringPool stringPool,
77                                                    ChunkyByteArray data,
78                                                    boolean xmlDecl,
79                                                    boolean allowJavaEncodingName) throws Exception JavaDoc
80     {
81         XMLEntityHandler.EntityReader reader = null;
82         byte b0 = data.byteAt(0);
83         if (b0 == 0) {
84             int b1 = data.byteAt(1);
85             if (b1 == 0) {
86                 if (data.byteAt(2) == 0 && data.byteAt(3) == '<')
87                     reader = new UCSReader(entityHandler, errorReporter, sendCharDataAsCharArray, data, UCSReader.E_UCS4B, stringPool);
88             } else if (b1 == '<') {
89                 if (data.byteAt(2) == 0 && data.byteAt(3) == '?')
90                     reader = new UCSReader(entityHandler, errorReporter, sendCharDataAsCharArray, data, UCSReader.E_UCS2B_NOBOM, stringPool);
91             }
92         } else if (b0 == '<') {
93             int b1 = data.byteAt(1);
94             if (b1 == 0) {
95                 int b2 = data.byteAt(2);
96                 if (data.byteAt(3) == 0) {
97                     if (b2 == 0)
98                         reader = new UCSReader(entityHandler, errorReporter, sendCharDataAsCharArray, data, UCSReader.E_UCS4L, stringPool);
99                     else if (b2 == '?')
100                         reader = new UCSReader(entityHandler, errorReporter, sendCharDataAsCharArray, data, UCSReader.E_UCS2L_NOBOM, stringPool);
101                 }
102             }
103         } else if (b0 == (byte)0xfe) {
104             if (data.byteAt(1) == (byte)0xff)
105                 reader = new UCSReader(entityHandler, errorReporter, sendCharDataAsCharArray, data, UCSReader.E_UCS2B, stringPool);
106         } else if (b0 == (byte)0xff) {
107             if (data.byteAt(1) == (byte)0xfe)
108                 reader = new UCSReader(entityHandler, errorReporter, sendCharDataAsCharArray, data, UCSReader.E_UCS2L, stringPool);
109         }
110         return reader;
111     }
112 }
113
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