/*
* The Apache Software License, Version 1.1
*
*
* Copyright (c) 2000-2002 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 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 end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Xerces" and "Apache Software Foundation" must
* not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
* nor may "Apache" appear in their name, without prior written
* permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``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 THE APACHE SOFTWARE FOUNDATION 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.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation and was
* originally based on software copyright (c) 1999, International
* Business Machines, Inc., http://www.apache.org. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
package com.sun.org.apache.xerces.internal.jaxp.validation;
import java.io.IOException;
import javax.xml.parsers.FactoryConfigurationError;
import javax.xml.parsers.SAXParserFactory;
import javax.xml.transform.Result;
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactoryConfigurationError;
import javax.xml.transform.dom.DOMResult;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.sax.SAXResult;
import javax.xml.transform.sax.SAXSource;
import javax.xml.transform.sax.SAXTransformerFactory;
import javax.xml.transform.sax.TransformerHandler;
import javax.xml.transform.stream.StreamSource;
import javax.xml.validation.Schema;
import javax.xml.validation.Validator;
import javax.xml.validation.ValidatorHandler;
import org.w3c.dom.ls.LSInput;
import org.w3c.dom.ls.LSResourceResolver;
import org.xml.sax.EntityResolver;
import org.xml.sax.ErrorHandler;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
import org.xml.sax.XMLReader;
/**
* <b>(For Implementors)</b> Default implementation of {@link Validator}.
*
* <p>
* This class is intended to be used in conjunction with
* {@link AbstractSchemaImpl} to promote consistent
* behaviors among {@link Schema} implementations.
*
* <p>
* This class wraps a {@link javax.xml.validation.ValidatorHandler}
* object and implements the {@link Validator} semantics.
*
* @author <a href="mailto:Kohsuke.Kawaguchi@Sun.com">Kohsuke Kawaguchi</a>
* @version $Revision: 1.5 $, $Date: 2004/07/12 20:38:39 $
* @since 1.5
*/
class ValidatorImpl extends Validator {
/**
* The actual validation will be done by this object.
*/
private final ValidatorHandlerImpl handler;
/**
* Lazily created identity transformer.
*/
private Transformer identityTransformer1 = null;
private TransformerHandler identityTransformer2 = null;
ValidatorImpl( ValidatorHandlerImpl _handler ) {
this.handler = _handler;
}
public LSResourceResolver getResourceResolver() {
return handler.getResourceResolver();
}
public ErrorHandler getErrorHandler() {
return handler.getErrorHandler();
}
public void setResourceResolver(LSResourceResolver resolver) {
handler.setResourceResolver(resolver);
}
public void setErrorHandler(ErrorHandler errorHandler) {
handler.setErrorHandler(errorHandler);
}
public void validate(Source source, Result result) throws SAXException, IOException {
if( source instanceof DOMSource ) {
if( result!=null && !(result instanceof DOMResult) )
throw new IllegalArgumentException(result.getClass().getName());
process( (DOMSource)source, (DOMResult)result );
return;
}
if( source instanceof SAXSource ) {
if( result!=null && !(result instanceof SAXResult) )
throw new IllegalArgumentException(result.getClass().getName());
process( (SAXSource)source, (SAXResult)result );
return;
}
if( source instanceof StreamSource ) {
if( result!=null )
throw new IllegalArgumentException(result.getClass().getName());
StreamSource ss = (StreamSource)source;
InputSource is = new InputSource();
is.setByteStream(ss.getInputStream());
is.setCharacterStream(ss.getReader());
is.setPublicId(ss.getPublicId());
is.setSystemId(ss.getSystemId());
process( new SAXSource(is), null );
return;
}
throw new IllegalArgumentException(source.getClass().getName());
}
/**
* Parses a {@link SAXSource} potentially to a {@link SAXResult}.
*/
private void process(SAXSource source, SAXResult result) throws IOException, SAXException {
if( result!=null ) {
handler.setContentHandler(result.getHandler());
}
try {
XMLReader reader = source.getXMLReader();
if( reader==null ) {
// create one now
SAXParserFactory spf = SAXParserFactory.newInstance();
spf.setNamespaceAware(true);
try {
reader = spf.newSAXParser().getXMLReader();
} catch( Exception e ) {
// this is impossible, but better safe than sorry
throw new FactoryConfigurationError(e);
}
}
reader.setErrorHandler(errorForwarder);
reader.setEntityResolver(resolutionForwarder);
reader.setContentHandler(handler);
InputSource is = source.getInputSource();
reader.parse(is);
} finally {
// release the reference to user's handler ASAP
handler.setContentHandler(null);
}
}
/**
* Parses a {@link DOMSource} potentially to a {@link DOMResult}.
*/
private void process( DOMSource source, DOMResult result ) throws SAXException {
if( identityTransformer1==null ) {
try {
SAXTransformerFactory tf = (SAXTransformerFactory)SAXTransformerFactory.newInstance();
identityTransformer1 = tf.newTransformer();
identityTransformer2 = tf.newTransformerHandler();
} catch (TransformerConfigurationException e) {
// this is impossible, but again better safe than sorry
throw new TransformerFactoryConfigurationError(e);
}
}
if( result!=null ) {
handler.setContentHandler(identityTransformer2);
identityTransformer2.setResult(result);
}
try {
identityTransformer1.transform( source, new SAXResult(handler) );
} catch (TransformerException e) {
if( e.getException() instanceof SAXException )
throw (SAXException)e.getException();
throw new SAXException(e);
} finally {
handler.setContentHandler(null);
}
}
/**
* Forwards the error to the {@link ValidatorHandler}.
* If the {@link ValidatorHandler} doesn't have its own
* {@link ErrorHandler}, behave draconian.
*/
private final ErrorHandler errorForwarder = new ErrorHandler() {
public void warning(SAXParseException exception) throws SAXException {
ErrorHandler realHandler = handler.getErrorHandler();
if( realHandler!=null )
realHandler.warning(exception);
}
public void error(SAXParseException exception) throws SAXException {
ErrorHandler realHandler = handler.getErrorHandler();
if( realHandler!=null )
realHandler.error(exception);
else
throw exception;
}
public void fatalError(SAXParseException exception) throws SAXException {
ErrorHandler realHandler = handler.getErrorHandler();
if( realHandler!=null )
realHandler.fatalError(exception);
else
throw exception;
}
};
/**
* Forwards the entity resolution to the {@link ValidatorHandler}.
* If the {@link ValidatorHandler} doesn't have its own
* {@link DOMResourceResolver}, let the parser do the resolution.
*/
private final EntityResolver resolutionForwarder = new EntityResolver() {
public InputSource resolveEntity(String publicId, String systemId) throws SAXException, IOException {
LSResourceResolver resolver = handler.getResourceResolver();
if( resolver==null ) return null;
LSInput di = resolver.resolveResource(null,null,publicId,systemId,null);
if(di==null) return null;
InputSource r = new InputSource();
r.setByteStream(di.getByteStream());
r.setCharacterStream(di.getCharacterStream());
r.setEncoding(di.getEncoding());
r.setPublicId(di.getPublicId());
r.setSystemId(di.getSystemId());
return r;
}
};
public void reset() {
handler.reset();
// I don't think this is necessary, but I don't think it hurts either.
// so reset just for the kick.
if(identityTransformer1!=null) {
identityTransformer1.reset();
}
}
}
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