/**
 * @(#)ParseXml.java 02/04/02 
 *
 * Author: Manish Dixit
 *         
 * Version: 1.0 
 *
 * Copyright (c) 2000 Sun Microsystems, Inc. All Rights Reserved.
 *
 * This software is the confidential and proprietary information of Sun
 * Microsystems, Inc. ("Confidential Information").  You shall not disclose
 * such Confidential Information and shall use it only in accordance with
 * the terms of the license agreement you entered into with Sun.
 *
 * SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF THE
 * SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE,
 * OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY
 * LICENSEE AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE
 * OR ITS DERIVATIVES.
 *
 * Description:
 *
 * This class is designed to server as a channel generator for   
 *                       
 * REVISION HISTORY:
 * 05/15/2003  Manish Dixit -- initial version
 ***********************************************************************************/

import java.io.*;
import java.util.*;

//Import for XML
import javax.xml.transform.*;
import javax.xml.transform.stream.*;

public class ParseXml{ 

	public static StringBuffer getContent(BufferedInputStream in,  String xsl) 
			throws Exception {

		System.out.println("Inside getContent");

		try{
			//Set the Transformation to use
			System.setProperty("javax.xml.transform.TransformerFactory","org.apache.xalan.processor.TransformerFactoryImpl");
			System.setProperty("javax.xml.parsers.DocumentBuilderFactory","org.apache.xerces.jaxp.DocumentBuilderFactoryImpl");
			System.setProperty("javax.xml.parsers.SAXParserFactory","org.apache.xerces.jaxp.SAXParserFactoryImpl");

			TransformerFactory tFactory = null;
			Transformer transformer = null;
			tFactory = TransformerFactory.newInstance();
			transformer = tFactory.newTransformer(new StreamSource(xsl));

			ByteArrayOutputStream baos = new ByteArrayOutputStream();
			transformer.transform(new StreamSource(in), new StreamResult(baos));

			// Output content
			int len;
			StringBuffer buf = new StringBuffer();
			buf.append(baos.toString());
			baos.close();

			return buf;
		} catch(Exception e){
			System.out.println("Exception in getContent");
			e.printStackTrace();
			return null;
		}
	}

	public static void main(String args[]) {
		BufferedInputStream xmlStream = null;
		File outputFile = null;
		if (args.length < 3) {
			usage();
			System.exit(-1);
		}

		/*
		 * Open the files and initialize streams
		 */
		try {
			// FileOutputStream = new FileOutputStream(args[2]);
			FileInputStream xmlFile = new FileInputStream(args[0]);
			xmlStream = new BufferedInputStream(xmlFile);
		} catch (Exception ex) {
			usage();
			System.exit(-1);
		}

		String xsl = args[1];
		StringBuffer output = null;

		try {
			output = getContent(xmlStream, xsl);
		} catch (Exception ex) {
			System.out.println("Exception during parsing");
		}

		try {
			PrintWriter out = 
				new PrintWriter(new BufferedWriter(new FileWriter(args[2])));
			out.write(output.toString(), 0, output.toString().length());
			out.flush();
			out.close();
		} catch (Exception ex) {
            System.out.println("Exception during processing output stream");
        }
		// System.out.println("Output is " + output);

	}

	private static void usage() {
		System.out.println("Usage: java ParseXml <xmlfile> <stylesheet> <outputfile>");
		System.out.println("Please Enter valid file names\n");
	}

}