/*
* Copyright 2001-2004 The Apache Software Foundation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
* $Id: TrAXFilter.java,v 1.2.4.1 2005/09/06 12:23:19 pvedula Exp $
*/
package com.sun.org.apache.xalan.internal.xsltc.trax;
import java.io.IOException;
import javax.xml.XMLConstants;
import javax.xml.parsers.FactoryConfigurationError;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import javax.xml.transform.ErrorListener;
import javax.xml.transform.Templates;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.sax.SAXResult;
import com.sun.org.apache.xml.internal.utils.XMLReaderManager;
import org.xml.sax.ContentHandler;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;
import org.xml.sax.helpers.XMLFilterImpl;
import org.xml.sax.helpers.XMLReaderFactory;
/**
* skeleton extension of XMLFilterImpl for now.
* @author Santiago Pericas-Geertsen
* @author G. Todd Miller
*/
public class TrAXFilter extends XMLFilterImpl {
private Templates _templates;
private TransformerImpl _transformer;
private TransformerHandlerImpl _transformerHandler;
public TrAXFilter(Templates templates) throws
TransformerConfigurationException
{
_templates = templates;
_transformer = (TransformerImpl) templates.newTransformer();
_transformerHandler = new TransformerHandlerImpl(_transformer);
}
public Transformer getTransformer() {
return _transformer;
}
private void createParent() throws SAXException {
XMLReader parent = null;
try {
SAXParserFactory pfactory = SAXParserFactory.newInstance();
pfactory.setNamespaceAware(true);
if (_transformer.isSecureProcessing()) {
try {
pfactory.setFeature(XMLConstants.FEATURE_SECURE_PROCESSING, true);
}
catch (SAXException e) {}
}
SAXParser saxparser = pfactory.newSAXParser();
parent = saxparser.getXMLReader();
}
catch (ParserConfigurationException e) {
throw new SAXException(e);
}
catch (FactoryConfigurationError e) {
throw new SAXException(e.toString());
}
if (parent == null) {
parent = XMLReaderFactory.createXMLReader();
}
// make this XMLReader the parent of this filter
setParent(parent);
}
public void parse (InputSource input) throws SAXException, IOException
{
XMLReader managedReader = null;
try {
if (getParent() == null) {
try {
managedReader = XMLReaderManager.getInstance()
.getXMLReader();
setParent(managedReader);
} catch (SAXException e) {
throw new SAXException(e.toString());
}
}
// call parse on the parent
getParent().parse(input);
} finally {
if (managedReader != null) {
XMLReaderManager.getInstance().releaseXMLReader(managedReader);
}
}
}
public void parse (String systemId) throws SAXException, IOException
{
parse(new InputSource(systemId));
}
public void setContentHandler (ContentHandler handler)
{
_transformerHandler.setResult(new SAXResult(handler));
if (getParent() == null) {
try {
createParent();
}
catch (SAXException e) {
return;
}
}
getParent().setContentHandler(_transformerHandler);
}
public void setErrorListener (ErrorListener handler) { }
}