/*
* Copyright 2007 Moritz Ringler
*
* 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.
*/
package net.sourceforge.gpstools.castor;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.TransformerFactoryConfigurationError;
import javax.xml.transform.sax.SAXTransformerFactory;
import org.exolab.castor.xml.OutputFormat;
import org.exolab.castor.xml.Serializer;
import org.exolab.castor.xml.XMLSerializerFactory;
/**
* An XMLSerializerFactory that relies only on the public javax.xml.transform
* API.
*
* @author Moritz Ringler
*/
public class TransformerXMLSerializerFactory implements XMLSerializerFactory {
private final SAXTransformerFactory stf;
/** @throws TransformerConfigurationError if the TransformerFactory
returned by TransformerFactory.newInstance() is not a SAXTransformerFactory
**/
public TransformerXMLSerializerFactory(){
TransformerFactory tf = TransformerFactory.newInstance();
if(!tf.getFeature(SAXTransformerFactory.FEATURE) || !(tf instanceof SAXTransformerFactory)){
throw new TransformerFactoryConfigurationError(
tf.getClass().getName() +
" is not a SAXTransformerFactory." +
"Please set the system property " +
"javax.xml.transform.TransformerFactory to a "+
"SAXTransformerFactory implementation.") ;
}
stf = (SAXTransformerFactory) tf;
}
/**
* @inheritDoc
*/
@Override
public Serializer getSerializer() {
try{
return new TransformerSerializer(stf.newTransformerHandler());
} catch (TransformerConfigurationException tcx){
throw new RuntimeException("Cannot create TransformerSerializer.", tcx);
}
}
/**
* @inheritDoc
*/
@Override
public OutputFormat getOutputFormat() {
String preserveSpaceProperty = null;
String omitDocumentTypeProperty = null;
//String tfClass = stf.getClass().getName();
//if("my.special.transformer.Factory".equals(tfClass)){
// preserveSpaceProperty = my.special.transformer.OutputKeys.PRESERVE_SPACE;
// omitDocumentTypeProperty = my.special.transformer.OutputKeys.OMIT_DOCUMENT_TYPE_DECLARATION;
//} else if(...) {
// }
return new TransformerOutputFormat(preserveSpaceProperty, omitDocumentTypeProperty);
}
}