Schema Validation with Java and Document object

Question

Hi, I am working on a project that will validate an xml Document object from a child class. I seem to have completed XSD validation with new DOMSource(doc) and using schema factory, which doesn't support DTD validation. And now I am attempting to validate the DTD. It seems like all the examples I've seen are trying to parse files, and I am struggling with finding a way to validate it directly against the document object.
The child class creates the xml document which is passed back to the parent class, and I need to do the validation in the parent class, so I need away to validate against the document object. This will be an assertion in Fitnesse if anyone is familar with it.
private void doSchemaValidationCommand(int rowCount, Document doc, String xpathExpression)
         String validationPath = getText(rowCount,1);
         String extensionSeparator = ".";
         Boolean error = false;
         String ext = null;
         try
         int dot = validationPath.lastIndexOf(extensionSeparator);
        ext = validationPath.substring(dot + 1);
         catch(Exception e)
              this.wrong(rowCount, 1, e.getMessage());
         if (ext.equalsIgnoreCase("xsd"))
         try {
         SchemaFactory factory =
            SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
        File schemaLocation = new File(validationPath);
        Schema schema = factory.newSchema(schemaLocation);
        Validator validator = schema.newValidator();
        try {
            validator.validate(new DOMSource(doc));
        catch (SAXException ex) {
            this.wrong(rowCount, 1, ex.getMessage());
            error = true;
        catch (IOException ex)  {
             this.wrong(rowCount, 1, ex.getMessage());
             error = true;
       catch (SAXException ex) {
           this.wrong(rowCount, 1, ex.getMessage());
           error = true;
       catch (Exception ex){
            this.wrong(rowCount, 1, ex.getMessage());
            error = true;
         else if (ext.equalsIgnoreCase("dtd"))
              try {
         }

Answer 1

I tried this but it doesn't give me any validation of whether or not it was completed successfully, it just adds a tag for the dtd to the xml and doesn't seem to do anything further with it, am I missing any steps?
else if (ext.equalsIgnoreCase("dtd"))
              try {
                   DOMSource source = new DOMSource(doc);
                   StreamResult result = new StreamResult(System.out);
                   TransformerFactory tf = TransformerFactory.newInstance();
                   Transformer transformer = tf.newTransformer();
                   transformer.setOutputProperty(OutputKeys.DOCTYPE_SYSTEM, validationPath);
                   transformer.transform(source, result);
              catch(Exception e)
                   this.wrong(rowCount, 1, e.getMessage());
                   error = true;
         }Edited by: sarcasteak on Apr 13, 2009 1:33 PM