001 /*
002 * Copyright 2004-2005 Sun Microsystems, Inc. All Rights Reserved.
003 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
004 *
005 * This code is free software; you can redistribute it and/or modify it
006 * under the terms of the GNU General Public License version 2 only, as
007 * published by the Free Software Foundation. Sun designates this
008 * particular file as subject to the "Classpath" exception as provided
009 * by Sun in the LICENSE file that accompanied this code.
010 *
011 * This code is distributed in the hope that it will be useful, but WITHOUT
012 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
013 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
014 * version 2 for more details (a copy is included in the LICENSE file that
015 * accompanied this code).
016 *
017 * You should have received a copy of the GNU General Public License version
018 * 2 along with this work; if not, write to the Free Software Foundation,
019 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
020 *
021 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
022 * CA 95054 USA or visit www.sun.com if you need additional information or
023 * have any questions.
024 */
025
026 // DefaultHandler2.java - extended DefaultHandler
027 // http://www.saxproject.org
028 // Public Domain: no warranty.
029 // $Id: DefaultHandler2.java,v 1.2 2004/11/03 22:49:08 jsuttor Exp $
030 package org.xml.sax.ext;
031
032 import java.io.IOException;
033 import org.xml.sax.InputSource;
034 import org.xml.sax.SAXException;
035 import org.xml.sax.helpers.DefaultHandler;
036
037 /**
038 * This class extends the SAX2 base handler class to support the
039 * SAX2 {@link LexicalHandler}, {@link DeclHandler}, and
040 * {@link EntityResolver2} extensions. Except for overriding the
041 * original SAX1 {@link DefaultHandler#resolveEntity resolveEntity()}
042 * method the added handler methods just return. Subclassers may
043 * override everything on a method-by-method basis.
044 *
045 * <blockquote>
046 * <em>This module, both source code and documentation, is in the
047 * Public Domain, and comes with <strong>NO WARRANTY</strong>.</em>
048 * </blockquote>
049 *
050 * <p> <em>Note:</em> this class might yet learn that the
051 * <em>ContentHandler.setDocumentLocator()</em> call might be passed a
052 * {@link Locator2} object, and that the
053 * <em>ContentHandler.startElement()</em> call might be passed a
054 * {@link Attributes2} object.
055 *
056 * @since SAX 2.0 (extensions 1.1 alpha)
057 * @author David Brownell
058 * @version TBS
059 */
060 public class DefaultHandler2 extends DefaultHandler implements
061 LexicalHandler, DeclHandler, EntityResolver2 {
062 /** Constructs a handler which ignores all parsing events. */
063 public DefaultHandler2() {
064 }
065
066 // SAX2 ext-1.0 LexicalHandler
067
068 public void startCDATA() throws SAXException {
069 }
070
071 public void endCDATA() throws SAXException {
072 }
073
074 public void startDTD(String name, String publicId, String systemId)
075 throws SAXException {
076 }
077
078 public void endDTD() throws SAXException {
079 }
080
081 public void startEntity(String name) throws SAXException {
082 }
083
084 public void endEntity(String name) throws SAXException {
085 }
086
087 public void comment(char ch[], int start, int length)
088 throws SAXException {
089 }
090
091 // SAX2 ext-1.0 DeclHandler
092
093 public void attributeDecl(String eName, String aName, String type,
094 String mode, String value) throws SAXException {
095 }
096
097 public void elementDecl(String name, String model)
098 throws SAXException {
099 }
100
101 public void externalEntityDecl(String name, String publicId,
102 String systemId) throws SAXException {
103 }
104
105 public void internalEntityDecl(String name, String value)
106 throws SAXException {
107 }
108
109 // SAX2 ext-1.1 EntityResolver2
110
111 /**
112 * Tells the parser that if no external subset has been declared
113 * in the document text, none should be used.
114 */
115 public InputSource getExternalSubset(String name, String baseURI)
116 throws SAXException, IOException {
117 return null;
118 }
119
120 /**
121 * Tells the parser to resolve the systemId against the baseURI
122 * and read the entity text from that resulting absolute URI.
123 * Note that because the older
124 * {@link DefaultHandler#resolveEntity DefaultHandler.resolveEntity()},
125 * method is overridden to call this one, this method may sometimes
126 * be invoked with null <em>name</em> and <em>baseURI</em>, and
127 * with the <em>systemId</em> already absolutized.
128 */
129 public InputSource resolveEntity(String name, String publicId,
130 String baseURI, String systemId) throws SAXException,
131 IOException {
132 return null;
133 }
134
135 // SAX1 EntityResolver
136
137 /**
138 * Invokes
139 * {@link EntityResolver2#resolveEntity EntityResolver2.resolveEntity()}
140 * with null entity name and base URI.
141 * You only need to override that method to use this class.
142 */
143 public InputSource resolveEntity(String publicId, String systemId)
144 throws SAXException, IOException {
145 return resolveEntity(null, publicId, null, systemId);
146 }
147 }
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