import org.apache.xalan.xslt.*;
import java.net.*;
import java.io.*;

public class xaland {
   public static void Transform(StylesheetRoot style, String xmlSourceURL, String OutputURL) throws java.io.IOException, java.net.MalformedURLException, org.xml.sax.SAXException
   {
      XSLTInputSource xmlSource = new XSLTInputSource (xmlSourceURL);
      XSLTResultTarget xmlResult = new XSLTResultTarget (OutputURL);
      style.process(xmlSource, xmlResult);
   }

   public static void main(String argv[]) throws  java.io.IOException, java.net.MalformedURLException, org.xml.sax.SAXException
   {
      int port    = Integer.parseInt(argv[0]);
      int port2   = Integer.parseInt(argv[1]);
      String xsl1 = argv[2];
      String xsl2 = argv[3];
      String theory_xsl1 = argv[4];
      String theory_xsl2 = argv[5];

      XSLTProcessor theory_processor = XSLTProcessorFactory.getProcessor();
      StylesheetRoot theory_style1 =
         theory_processor.processStylesheet(theory_xsl1);
      StylesheetRoot theory_style2 =
         theory_processor.processStylesheet(theory_xsl2);
      theory_processor.setStylesheet(theory_style2);

      XSLTProcessor processor = XSLTProcessorFactory.getProcessor();
      StylesheetRoot style1 = processor.processStylesheet(xsl1);
      StylesheetRoot style2 = processor.processStylesheet(xsl2);
      processor.setStylesheet(style2);

      DatagramSocket socket = new DatagramSocket(port);

      System.out.println("Demon activated on input port " + port +
       " and output port " + port2);
      while(true) {
         System.out.print("Ready...");

         /* Warning: the packet must be a fresh one! */
         DatagramPacket packet = new DatagramPacket(new byte[1024],1024);
         socket.receive(packet);
         byte data[] = packet.getData();
         int datalen = packet.getLength();
         String received = new String(data,0,datalen);

         int first = received.indexOf(' ');
         int last  = received.lastIndexOf(' ');
         String mode = received.substring(0,first);
         String input = received.substring(first+1,last);
         String output = received.substring(last+1);

         System.out.println("request received! Parameters are");
         System.out.println("Mode: " + mode + " ");
         System.out.println("Input file: \"" + input + "\"");
         System.out.println("Output file: \"" + output  + "\"\n");

         if ((new File(output)).exists()) {
            System.out.println("Using cached version\n");
         } else {
            FileOutputStream fout = new FileOutputStream(output);
            if (mode.equals("cic")) {
               processor.setDocumentHandler(style2.getSAXSerializer(fout));
               XSLTResultTarget content = new XSLTResultTarget(processor);
               style1.process(new XSLTInputSource(input), content);
            } else if (mode.equals("theory")) {
               theory_processor.setDocumentHandler(
                  theory_style2.getSAXSerializer(fout));
               XSLTResultTarget content =
                  new XSLTResultTarget(theory_processor);
               theory_style1.process(new XSLTInputSource(input), content);
            }
         }

         InetAddress address = InetAddress.getLocalHost();
         DatagramSocket socket2 = new DatagramSocket();

         byte buf[] = new byte[0];
         DatagramPacket packet2 = new DatagramPacket(buf,0,address,port2);

         socket2.send(packet2);
      }
   }
}