/*
* Copyright 2001-2005 (C) MetaStuff, Ltd. All Rights Reserved.
*
* This software is open source.
* See the bottom of this file for the licence.
*/
package org.dom4j.io;
import org.dom4j.Document;
import org.xml.sax.ContentHandler;
import org.xml.sax.ErrorHandler;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;
import org.xml.sax.helpers.DefaultHandler;
import java.io.IOException;
/**
* <p>
* <code>SAXValidator</code> validates an XML document by writing the document
* to a text buffer and parsing it with a validating SAX parser. This could be
* implemented much more efficiently by validating against the dom4j object
* model directly but at least allows the reuse of existing SAX based validating
* parsers.
* </p>
*
* @author <a href="mailto:james.strachan@metastuff.com">James Strachan </a>
* @version $Revision: 1.10 $
*/
public class SAXValidator {
/**
* <code>XMLReader</code> used to parse the SAX events
*/
private XMLReader xmlReader;
/**
* ErrorHandler class to use
*/
private ErrorHandler errorHandler;
public SAXValidator() {
}
public SAXValidator(XMLReader xmlReader) {
this.xmlReader = xmlReader;
}
/**
* Validates the given <code>Document</code> by writing it to a validating
* SAX Parser.
*
* @param document is the Document to validate
* @throws SAXException if a validation error occurs
* @throws RuntimeException DOCUMENT ME!
*/
public void validate(Document document) throws SAXException {
if (document != null) {
XMLReader reader = getXMLReader();
if (errorHandler != null) {
reader.setErrorHandler(errorHandler);
}
try {
reader.parse(new DocumentInputSource(document));
} catch (IOException e) {
throw new RuntimeException("Caught and exception that should "
+ "never happen: " + e);
}
}
}
// Properties
// -------------------------------------------------------------------------
/**
* DOCUMENT ME!
*
* @return the <code>XMLReader</code> used to parse SAX events
* @throws SAXException DOCUMENT ME!
*/
public XMLReader getXMLReader() throws SAXException {
if (xmlReader == null) {
xmlReader = createXMLReader();
configureReader();
}
return xmlReader;
}
/**
* Sets the <code>XMLReader</code> used to parse SAX events
*
* @param reader is the <code>XMLReader</code> to parse SAX events
* @throws SAXException DOCUMENT ME!
*/
public void setXMLReader(XMLReader reader) throws SAXException {
this.xmlReader = reader;
configureReader();
}
/**
* DOCUMENT ME!
*
* @return the <code>ErrorHandler</code> used by SAX
*/
public ErrorHandler getErrorHandler() {
return errorHandler;
}
/**
* Sets the <code>ErrorHandler</code> used by the SAX
* <code>XMLReader</code>.
*
* @param errorHandler is the <code>ErrorHandler</code> used by SAX
*/
public void setErrorHandler(ErrorHandler errorHandler) {
this.errorHandler = errorHandler;
}
// Implementation methods
// -------------------------------------------------------------------------
/**
* Factory Method to allow alternate methods of creating and configuring
* XMLReader objects
*
* @return DOCUMENT ME!
* @throws SAXException DOCUMENT ME!
*/
protected XMLReader createXMLReader() throws SAXException {
return SAXHelper.createXMLReader(true);
}
/**
* Configures the XMLReader before use
*
* @throws SAXException DOCUMENT ME!
*/
protected void configureReader() throws SAXException {
ContentHandler handler = xmlReader.getContentHandler();
if (handler == null) {
xmlReader.setContentHandler(new DefaultHandler());
}
// configure validation support
xmlReader.setFeature("http://xml.org/sax/features/validation", true);
// configure namespace support
xmlReader.setFeature("http://xml.org/sax/features/namespaces", true);
xmlReader.setFeature("http://xml.org/sax/features/namespace-prefixes",
false);
}
}
/*
* Redistribution and use of this software and associated documentation
* ("Software"), with or without modification, are permitted provided that the
* following conditions are met:
*
* 1. Redistributions of source code must retain copyright statements and
* notices. Redistributions must also contain a copy of this document.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* 3. The name "DOM4J" must not be used to endorse or promote products derived
* from this Software without prior written permission of MetaStuff, Ltd. For
* written permission, please contact dom4j-info@metastuff.com.
*
* 4. Products derived from this Software may not be called "DOM4J" nor may
* "DOM4J" appear in their names without prior written permission of MetaStuff,
* Ltd. DOM4J is a registered trademark of MetaStuff, Ltd.
*
* 5. Due credit should be given to the DOM4J Project - http://dom4j.sourceforge.net
*
* THIS SOFTWARE IS PROVIDED BY METASTUFF, LTD. AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL METASTUFF, LTD. OR ITS CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* Copyright 2001-2005 (C) MetaStuff, Ltd. All Rights Reserved.
*/