package mco.costanalysis.combat;

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

// JDOM
import org.jdom.Document;
import org.jdom.Element;
import org.jdom.JDOMException;
import org.jdom.input.SAXBuilder;
import org.jdom.output.XMLOutputter;

// Xalan-J 2
import javax.xml.transform.*;
import javax.xml.transform.stream.StreamSource;
import javax.xml.transform.stream.StreamResult;

import java.io.File;
import java.io.PipedInputStream;
import java.io.PipedOutputStream;

class XML2HTML {
    /** Default SAX Driver class to use */
    private static final String DEFAULT_SAX_DRIVER_CLASS =
        "org.apache.xerces.parsers.SAXParser";

    /** SAX Driver Class to use */
    private String saxDriverClass;

    /** <code>{@link SAXBuilder}</code> instance to use */
    private SAXBuilder builder;
    
    /**
     * <p>
     * This will create an instance of <code>{@link SAXBuilder}</code>
     *   for use in the rest of this program.
     * </p>
     *
     * @param saxDriverClass <code>String</code> name of driver class to use.
     */
    
    public XML2HTML() {
        this.saxDriverClass = DEFAULT_SAX_DRIVER_CLASS;
        builder = new SAXBuilder(saxDriverClass);
    }

    public XML2HTML(String saxDriverClass) {
        this.saxDriverClass = saxDriverClass;
        builder = new SAXBuilder(saxDriverClass);
    }	
    
	
	public void transform(String xmlFile, String xslFile) 
	  throws Exception
	{
		Document sourceDoc = builder.build(new File(xmlFile));
		File xslt = new File(xslFile);
	    XMLOutputter xmlOutputter = new XMLOutputter();
	    TransformerFactory transformerFactory = TransformerFactory.newInstance();
	    Templates stylesheet = transformerFactory.newTemplates(
	            new StreamSource( xslt ) );
	    Transformer processor = stylesheet.newTransformer();

	    PipedInputStream sourceIn = new PipedInputStream();
	    PipedOutputStream sourceOut = new PipedOutputStream( sourceIn );
	    StreamSource source = new StreamSource( sourceIn );

	    PipedInputStream resultIn = new PipedInputStream();
	    PipedOutputStream resultOut = new PipedOutputStream( resultIn );
	    StreamResult result = new StreamResult( resultOut );

	    xmlOutputter.output( sourceDoc, sourceOut );
	    sourceOut.close();

	    processor.transform( source, result );
	    resultOut.close();

	    Document targetDoc = builder.build( resultIn );
		xmlOutputter.output( targetDoc, System.out);
	}
	
	public static void main(String[] args) throws Exception
	{
		XML2HTML x2h = new XML2HTML();
		x2h.transform("su.xml", "su.xsl");
	}
}