001: /*
002: * $Id: SAXParserImpl.java,v 1.7.2.1 2001/11/06 23:52:04 edwingo Exp $
003: *
004: * The Apache Software License, Version 1.1
005: *
006: *
007: * Copyright (c) 2000 The Apache Software Foundation. All rights
008: * reserved.
009: *
010: * Redistribution and use in source and binary forms, with or without
011: * modification, are permitted provided that the following conditions
012: * are met:
013: *
014: * 1. Redistributions of source code must retain the above copyright
015: * notice, this list of conditions and the following disclaimer.
016: *
017: * 2. Redistributions in binary form must reproduce the above copyright
018: * notice, this list of conditions and the following disclaimer in
019: * the documentation and/or other materials provided with the
020: * distribution.
021: *
022: * 3. The end-user documentation included with the redistribution,
023: * if any, must include the following acknowledgment:
024: * "This product includes software developed by the
025: * Apache Software Foundation (http://www.apache.org/)."
026: * Alternately, this acknowledgment may appear in the software itself,
027: * if and wherever such third-party acknowledgments normally appear.
028: *
029: * 4. The names "Xerces" and "Apache Software Foundation" must
030: * not be used to endorse or promote products derived from this
031: * software without prior written permission. For written
032: * permission, please contact apache@apache.org.
033: *
034: * 5. Products derived from this software may not be called "Apache",
035: * nor may "Apache" appear in their name, without prior written
036: * permission of the Apache Software Foundation.
037: *
038: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
039: * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
040: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
041: * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
042: * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
043: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
044: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
045: * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
046: * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
047: * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
048: * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
049: * SUCH DAMAGE.
050: * ====================================================================
051: *
052: * This software consists of voluntary contributions made by many
053: * individuals on behalf of the Apache Software Foundation and was
054: * originally based on software copyright (c) 1999, Sun Microsystems, Inc.,
055: * http://www.sun.com. For more information on the Apache Software
056: * Foundation, please see <http://www.apache.org/>.
057: */
058:
059: package org.apache.xerces.jaxp;
060:
061: import javax.xml.parsers.SAXParser;
062: import javax.xml.parsers.SAXParserFactory;
063: import javax.xml.parsers.ParserConfigurationException;
064:
065: import org.xml.sax.SAXException;
066: import org.xml.sax.SAXParseException;
067: import org.xml.sax.HandlerBase;
068: import org.xml.sax.Parser;
069: import org.xml.sax.XMLReader;
070: import org.xml.sax.helpers.XMLReaderAdapter;
071: import org.xml.sax.helpers.DefaultHandler;
072: import org.xml.sax.SAXNotRecognizedException;
073: import org.xml.sax.SAXNotSupportedException;
074:
075: import java.util.*;
076:
077: /**
078: * @author Rajiv Mordani
079: * @author Edwin Goei
080: * @version $Revision: 1.7.2.1 $
081: */
082:
083: /**
084: * This is the implementation specific class for the
085: * <code>javax.xml.parsers.SAXParser</code>.
086: */
087: public class SAXParserImpl extends javax.xml.parsers.SAXParser {
088: private XMLReader xmlReader;
089: private Parser parser = null;
090:
091: private boolean validating = false;
092: private boolean namespaceAware = false;
093:
094: /**
095: * Create a SAX parser with the associated features
096: * @param features Hashtable of SAX features, may be null
097: */
098: SAXParserImpl(SAXParserFactory spf, Hashtable features)
099: throws SAXException {
100: // Instantiate a SAXParser directly and not through SAX so that we
101: // use the right ClassLoader
102: xmlReader = new org.apache.xerces.parsers.SAXParser();
103:
104: // Validation
105: validating = spf.isValidating();
106: String validation = "http://xml.org/sax/features/validation";
107:
108: // If validating, provide a default ErrorHandler that prints
109: // validation errors with a warning telling the user to set an
110: // ErrorHandler. Note: this does not handle all cases.
111: if (validating) {
112: xmlReader
113: .setErrorHandler(new DefaultValidationErrorHandler());
114: }
115:
116: // Allow SAX parser to use a different ErrorHandler if it wants to
117: xmlReader.setFeature(validation, validating);
118:
119: // "namespaceAware" == SAX Namespaces feature
120: // Note: there is a compatibility problem here with default values:
121: // JAXP default is false while SAX 2 default is true!
122: namespaceAware = spf.isNamespaceAware();
123: String namespaces = "http://xml.org/sax/features/namespaces";
124: xmlReader.setFeature(namespaces, namespaceAware);
125:
126: // SAX "namespaces" and "namespace-prefixes" features must not both
127: // be false as specified by SAX
128: if (namespaceAware == false) {
129: String prefixes = "http://xml.org/sax/features/namespace-prefixes";
130: xmlReader.setFeature(prefixes, true);
131: }
132:
133: setFeatures(features);
134: }
135:
136: /**
137: * Set any features of our XMLReader based on any features set on the
138: * SAXParserFactory.
139: *
140: * XXX Does not handle possible conflicts between SAX feature names and
141: * JAXP specific feature names, eg. SAXParserFactory.isValidating()
142: */
143: private void setFeatures(Hashtable features)
144: throws SAXNotSupportedException, SAXNotRecognizedException {
145: if (features != null) {
146: for (Enumeration e = features.keys(); e.hasMoreElements();) {
147: String feature = (String) e.nextElement();
148: boolean value = ((Boolean) features.get(feature))
149: .booleanValue();
150: xmlReader.setFeature(feature, value);
151: }
152: }
153: }
154:
155: public Parser getParser() throws SAXException {
156: if (parser == null) {
157: // Adapt a SAX2 XMLReader into a SAX1 Parser
158: parser = new XMLReaderAdapter(xmlReader);
159:
160: // Set a DocumentHandler that does nothing to avoid getting
161: // exceptions if no DocumentHandler is set by the app
162: parser.setDocumentHandler(new HandlerBase());
163: }
164: return parser;
165: }
166:
167: /**
168: * Returns the XMLReader that is encapsulated by the implementation of
169: * this class.
170: */
171: public XMLReader getXMLReader() {
172: return xmlReader;
173: }
174:
175: public boolean isNamespaceAware() {
176: return namespaceAware;
177: }
178:
179: public boolean isValidating() {
180: return validating;
181: }
182:
183: /**
184: * Sets the particular property in the underlying implementation of
185: * org.xml.sax.XMLReader.
186: */
187: public void setProperty(String name, Object value)
188: throws SAXNotRecognizedException, SAXNotSupportedException {
189: xmlReader.setProperty(name, value);
190: }
191:
192: /**
193: * returns the particular property requested for in the underlying
194: * implementation of org.xml.sax.XMLReader.
195: */
196: public Object getProperty(String name)
197: throws SAXNotRecognizedException, SAXNotSupportedException {
198: return xmlReader.getProperty(name);
199: }
200: }
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