/*
* The Apache Software License, Version 1.1
*
*
* Copyright (c) 1999-2003 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 "Xalan" 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, Lotus
* Development Corporation., http://www.lotus.com. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
import java.io.IOException;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.sax.SAXResult;
import javax.xml.transform.sax.SAXSource;
import javax.xml.transform.sax.SAXTransformerFactory;
import javax.xml.transform.stream.StreamSource;
import org.apache.xalan.serialize.Serializer;
import org.apache.xalan.serialize.SerializerFactory;
import org.apache.xalan.templates.OutputProperties;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.XMLFilter;
import org.xml.sax.XMLReader;
import org.xml.sax.helpers.XMLReaderFactory;
/**
* This example shows how to chain a series of transformations by
* piping SAX events from one Transformer to another. Each Transformer
* operates as a SAX2 XMLFilter/XMLReader.
*/
public class UseXMLFilters
{
public static void main(String[] args)
throws TransformerException, TransformerConfigurationException,
SAXException, IOException
{
// Instantiate a TransformerFactory.
TransformerFactory tFactory = TransformerFactory.newInstance();
// Determine whether the TransformerFactory supports The use uf SAXSource
// and SAXResult
if (tFactory.getFeature(SAXSource.FEATURE) && tFactory.getFeature(SAXResult.FEATURE))
{
// Cast the TransformerFactory to SAXTransformerFactory.
SAXTransformerFactory saxTFactory = ((SAXTransformerFactory) tFactory);
// Create an XMLFilter for each stylesheet.
XMLFilter xmlFilter1 = saxTFactory.newXMLFilter(new StreamSource("foo1.xsl"));
XMLFilter xmlFilter2 = saxTFactory.newXMLFilter(new StreamSource("foo2.xsl"));
XMLFilter xmlFilter3 = saxTFactory.newXMLFilter(new StreamSource("foo3.xsl"));
// Create an XMLReader.
XMLReader reader = XMLReaderFactory.createXMLReader();
// xmlFilter1 uses the XMLReader as its reader.
xmlFilter1.setParent(reader);
// xmlFilter2 uses xmlFilter1 as its reader.
xmlFilter2.setParent(xmlFilter1);
// xmlFilter3 uses xmlFilter2 as its reader.
xmlFilter3.setParent(xmlFilter2);
// xmlFilter3 outputs SAX events to the serializer.
Serializer serializer = SerializerFactory.getSerializer
(OutputProperties.getDefaultMethodProperties("xml"));
serializer.setOutputStream(System.out);
xmlFilter3.setContentHandler(serializer.asContentHandler());
// Perform the series of transformations as follows:
// - transformer3 gets its parent (transformer2) as the XMLReader/XMLFilter
// and calls transformer2.parse(new InputSource("foo.xml")).
// - transformer2 gets its parent (transformer1) as the XMLReader/XMLFilter
// and calls transformer1.parse(new InputSource("foo.xml")).
// - transformer1 gets its parent (reader, a SAXParser) as the XMLReader
// and calls reader.parse(new InputSource("foo.xml")).
// - reader parses the XML document and sends the SAX parse events to transformer1,
// which performs transformation 1 and sends the output to transformer2.
// - transformer2 parses the transformation 1 output, performs transformation 2, and
// sends the output to transformer3.
// - transformer3 parses the transformation 2 output, performs transformation 3,
// and sends the output to the serializer.
xmlFilter3.parse(new InputSource("foo.xml"));
}
}
}