samples/UseXMLFilters/UseXMLFilters.java

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// Imported TraX classes
import org.apache.trax.Processor; 
import org.apache.trax.Templates;
import org.apache.trax.Transformer; 
import org.apache.trax.Result;
import org.apache.trax.ProcessorException; 
import org.apache.trax.ProcessorFactoryException;
import org.apache.trax.TransformException; 

// Imported SAX classes
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.Parser;
import org.xml.sax.helpers.ParserAdapter;
import org.xml.sax.helpers.XMLReaderFactory;
import org.xml.sax.XMLReader;
import org.xml.sax.ContentHandler;

// Imported DOM classes
import org.w3c.dom.Node;

// Imported Serializer classes
import org.apache.serialize.OutputFormat;
import org.apache.serialize.Serializer;
import org.apache.serialize.SerializerFactory;

// Imported JAVA API for XML Parsing 1.0 classes
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException; 

// Imported java.io classes
import java.io.InputStream;
import java.io.Reader;
import java.io.IOException;

  /**
   * 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 SAXException, IOException, ParserConfigurationException
  {  
    // Instantiate a stylesheet processor.
	Processor processor = Processor.newInstance("xslt");

	// Create a Templates object and a Transformer for each stylesheet.
    Templates stylesheet1 = processor.process(new InputSource("foo1.xsl"));
    Transformer transformer1 = stylesheet1.newTransformer();

	Templates stylesheet2= processor.process(new InputSource("foo2.xsl"));
    Transformer transformer2 = stylesheet2.newTransformer();

    Templates  stylesheet3 = processor.process(new InputSource("foo3.xsl"));
    Transformer transformer3= stylesheet3.newTransformer();
    
    // Create an XMLReader (implemented by the Xerces SAXParser).
	XMLReader reader = XMLReaderFactory.createXMLReader();
    
    // transformer1 uses the reader (SAXParser) as its reader.
    transformer1.setParent(reader);
    
    // transformer2 uses transformer1 as its reader.
    transformer2.setParent(transformer1);
    
    // transform3 uses transform2 as its reader.
    transformer3.setParent(transformer2);
    
    // transformer3 outputs SAX events to the serializer.
    Serializer serializer = SerializerFactory.getSerializer("xml");
    serializer.setOutputStream(System.out);
    transformer3.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.
    transformer3.parse(new InputSource("foo.xml"));
  }
}