XML -> XML using XSL,DTD XALAN - JAVA

[Thushara Perera <thusharap@eurocenter.lk>]

Hi
 
I have posted this before and I have received some help on this. But as I am
new to this and I still couldn't get it done. So I am re-posting this. I
hope someone could help me.

I am using XALAN to transform my XML file to another XML file using XSL. I
have a small JAVA program which does this. Does anyone knows How to validate
an XML file against the DTD using JAVA ? Is there any methods available in
XALAN to implement this ? If yes, could you please send me a sample example
of how to it, please ?
 
For your information, my JAVA program that I use to do the transformation is
listed below:
 
Your help will be very much appreciated.
 
Thanks a lot
 
Thushara

My Java Program:

import javax.xml.transform.TransformerFactory;
import javax.xml.transform.Transformer;
import javax.xml.transform.stream.StreamSource;
import javax.xml.transform.stream.StreamResult;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerConfigurationException;

import java.io.FileOutputStream;
import java.io.FileNotFoundException;
import java.io.IOException;

public class XmlToXmlConvertor
{
   private TransformerFactory tFactory;
   private Transformer transformer;

  public static void main(String[] args) throws TransformerException,
TransformerConfigurationException,
           FileNotFoundException, IOException
  {
    // Use the static TransformerFactory.newInstance() method to instantiate
a TransformerFactory. The   
    //javax.xml.transform.TransformerFactory
    // system property setting determines the actual class to instantiate --
    // org.apache.xalan.transformer.TransformerImpl.

    XmlToXmlConvertor xmlToXmlConversion = new XmlToXmlConvertor();

    xmlToXmlConversion.performTransformation();
  }

  public void performTransformation() throws TransformerException,
TransformerConfigurationException,
           FileNotFoundException, IOException
  {
    tFactory = TransformerFactory.newInstance();

    // Use the TransformerFactory to instantiate a Transformer that will
work with the stylesheet you
    // specify. This method call also processes the stylesheet into a
compiled Templates object.

   transformer = tFactory.newTransformer(new StreamSource
"Classes/colombo1classes/importexportfunctionsclasses/XslIn.xsl"));

    // Use the Transformer to apply the associated Templates object to an
XML document

    transformer.transform(new
StreamSource("Classes/colombo1classes/importexportfunctionsclasses/semicolon
.xml"), new StreamResult(new
FileOutputStream("Classes/colombo1classes/importexportfunctionsclasses/AAAAA
A.xml")));
  }
}