001: /*
002: * The Apache Software License, Version 1.1
003: *
004: *
005: * Copyright (c) 1999 The Apache Software Foundation. All rights
006: * reserved.
007: *
008: * Redistribution and use in source and binary forms, with or without
009: * modification, are permitted provided that the following conditions
010: * are met:
011: *
012: * 1. Redistributions of source code must retain the above copyright
013: * notice, this list of conditions and the following disclaimer.
014: *
015: * 2. Redistributions in binary form must reproduce the above copyright
016: * notice, this list of conditions and the following disclaimer in
017: * the documentation and/or other materials provided with the
018: * distribution.
019: *
020: * 3. The end-user documentation included with the redistribution,
021: * if any, must include the following acknowledgment:
022: * "This product includes software developed by the
023: * Apache Software Foundation (http://www.apache.org/)."
024: * Alternately, this acknowledgment may appear in the software itself,
025: * if and wherever such third-party acknowledgments normally appear.
026: *
027: * 4. The names "Xerces" and "Apache Software Foundation" must
028: * not be used to endorse or promote products derived from this
029: * software without prior written permission. For written
030: * permission, please contact apache@apache.org.
031: *
032: * 5. Products derived from this software may not be called "Apache",
033: * nor may "Apache" appear in their name, without prior written
034: * permission of the Apache Software Foundation.
035: *
036: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
037: * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
038: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
039: * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
040: * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
041: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
042: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
043: * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
044: * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
045: * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
046: * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
047: * SUCH DAMAGE.
048: * ====================================================================
049: *
050: * This software consists of voluntary contributions made by many
051: * individuals on behalf of the Apache Software Foundation and was
052: * originally based on software copyright (c) 1999, International
053: * Business Machines, Inc., http://www.apache.org. For more
054: * information on the Apache Software Foundation, please see
055: * <http://www.apache.org/>.
056: */
057:
058: package org.apache.xerces.readers;
059:
060: import org.apache.xerces.framework.XMLErrorReporter;
061: import org.apache.xerces.utils.ChunkyByteArray;
062: import org.apache.xerces.utils.StringPool;
063:
064: import java.io.IOException;
065:
066: /**
067: *
068: * @version
069: */
070: final class UCSRecognizer extends XMLDeclRecognizer {
071: //
072: //
073: //
074: public XMLEntityHandler.EntityReader recognize(
075: XMLEntityReaderFactory readerFactory,
076: XMLEntityHandler entityHandler,
077: XMLErrorReporter errorReporter,
078: boolean sendCharDataAsCharArray, StringPool stringPool,
079: ChunkyByteArray data, boolean xmlDecl,
080: boolean allowJavaEncodingName) throws Exception {
081: XMLEntityHandler.EntityReader reader = null;
082: byte b0 = data.byteAt(0);
083: if (b0 == 0) {
084: int b1 = data.byteAt(1);
085: if (b1 == 0) {
086: if (data.byteAt(2) == 0 && data.byteAt(3) == '<')
087: reader = new UCSReader(entityHandler,
088: errorReporter, sendCharDataAsCharArray,
089: data, UCSReader.E_UCS4B, stringPool);
090: } else if (b1 == '<') {
091: if (data.byteAt(2) == 0 && data.byteAt(3) == '?')
092: reader = new UCSReader(entityHandler,
093: errorReporter, sendCharDataAsCharArray,
094: data, UCSReader.E_UCS2B_NOBOM, stringPool);
095: }
096: } else if (b0 == '<') {
097: int b1 = data.byteAt(1);
098: if (b1 == 0) {
099: int b2 = data.byteAt(2);
100: if (data.byteAt(3) == 0) {
101: if (b2 == 0)
102: reader = new UCSReader(entityHandler,
103: errorReporter, sendCharDataAsCharArray,
104: data, UCSReader.E_UCS4L, stringPool);
105: else if (b2 == '?')
106: reader = new UCSReader(entityHandler,
107: errorReporter, sendCharDataAsCharArray,
108: data, UCSReader.E_UCS2L_NOBOM,
109: stringPool);
110: }
111: }
112: } else if (b0 == (byte) 0xfe) {
113: if (data.byteAt(1) == (byte) 0xff)
114: reader = new UCSReader(entityHandler, errorReporter,
115: sendCharDataAsCharArray, data,
116: UCSReader.E_UCS2B, stringPool);
117: } else if (b0 == (byte) 0xff) {
118: if (data.byteAt(1) == (byte) 0xfe)
119: reader = new UCSReader(entityHandler, errorReporter,
120: sendCharDataAsCharArray, data,
121: UCSReader.E_UCS2L, stringPool);
122: }
123: return reader;
124: }
125: }
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