/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements. See the NOTICE file distributed with this
 * work for additional information regarding copyright ownership. The ASF
 * licenses this file to you 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: Pipe.java 470245 2006-11-02 06:34:33Z minchau $
 */

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.Properties;

import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
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.sax.TransformerHandler;
import javax.xml.transform.stream.StreamResult;
import javax.xml.transform.stream.StreamSource;

import org.apache.xml.serializer.OutputPropertiesFactory;
import org.apache.xml.serializer.Serializer;
import org.apache.xml.serializer.SerializerFactory;
import org.xml.sax.SAXException;
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 Pipe {
	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)) {

			
			SAXTransformerFactory saxTFactory = ((SAXTransformerFactory) tFactory);
			
			// PIPE
			System.out.println("PIPE");
			{
				long start = System.currentTimeMillis(); 
				// Create a TransformerHandler for each stylesheet.
				TransformerHandler tHandler1 = saxTFactory.newTransformerHandler(new StreamSource("foo1.xsl"));
				TransformerHandler tHandler2 = saxTFactory.newTransformerHandler(new StreamSource("foo2.xsl"));
				TransformerHandler tHandler3 = saxTFactory.newTransformerHandler(new StreamSource("foo3.xsl"));
	
				// Create an XMLReader.
				XMLReader pipeReader = XMLReaderFactory.createXMLReader();
				pipeReader.setContentHandler(tHandler1);
				pipeReader.setProperty("http://xml.org/sax/properties/lexical-handler", tHandler1);
	
				tHandler1.setResult(new SAXResult(tHandler2));
				tHandler2.setResult(new SAXResult(tHandler3));
	
				// transformer3 outputs SAX events to the serializer.
				Properties xmlProps = OutputPropertiesFactory.getDefaultMethodProperties("xml");
				xmlProps.setProperty("indent", "yes");
				xmlProps.setProperty("standalone", "no");
				Serializer serializer = SerializerFactory.getSerializer(xmlProps);
				serializer.setOutputStream(System.out);
				tHandler3.setResult(new SAXResult(serializer.asContentHandler()));
	
				// Parse the XML input document. The input ContentHandler and output
				// ContentHandler
				// work in separate threads to optimize performance.
				pipeReader.parse("foo.xml");
				
	            System.out.println("time taken: " + (System.currentTimeMillis() - start) + "ms");
			}
			
			// SEQUENTIAL
			System.out.println("SEQUENTIAL");
			{
				long start = System.currentTimeMillis(); 
				Transformer t1 = saxTFactory.newTransformer(new StreamSource("foo1.xsl"));
				Transformer t2 = saxTFactory.newTransformer(new StreamSource("foo2.xsl"));
				Transformer t3 = saxTFactory.newTransformer(new StreamSource("foo3.xsl"));
	
				ByteArrayOutputStream t1Out = new ByteArrayOutputStream();
				t1.transform(new StreamSource("foo.xml"), new StreamResult(t1Out));
				
				ByteArrayOutputStream t2Out = new ByteArrayOutputStream();
				t2.transform(new StreamSource(new ByteArrayInputStream(t1Out.toByteArray())), new StreamResult(t2Out));
				
				t3.setOutputProperty(OutputKeys.METHOD, "xml");
	            t3.setOutputProperty(OutputKeys.INDENT, "yes");
				t3.setOutputProperty(OutputKeys.STANDALONE, "no");
	            t3.transform(new StreamSource(new ByteArrayInputStream(t2Out.toByteArray())), new StreamResult(System.out));
	            
	            System.out.println("time taken: " + (System.currentTimeMillis() - start) + "ms");
			}
		}
	}
}