[pde-dev] Parser problem when using it as plugin

["Trin t" <svkk2@xxxxxxxxxxx>]

Hi,
 I am trying to validate a XML file using SAX parser. The program works 
fine when it is a standalone application. But when I convert it to a plugin, 
The catch block for SAXParseException is not getting called, which it should 
be otherwise.  Any one has any idea what could the problem be ?
I am using the following versions

org.apache.xerces (4.0.13) "Xerces Based XML Parser"
java.version=1.4.2_01
eclipse platform version 2.1.1

And the java code snippet along with plugin.xml is as follows :

public void warning(final SAXParseException exception)
	 {
	 	 errorMsg = "Warning: " + exception.getMessage();
		 errorMsg += " at line " + exception.getLineNumber()
			    + ", column " +  exception.getColumnNumber();

		doc.set(errorMsg);
		viewer.setDocument(doc);
		// Well-formedness is a prerequisite for validity
	   valid = false;

	 }

	 public void error(final SAXParseException exception)
	 {	errorMsg = "Error: " + exception.getMessage();
	       errorMsg += " at line " +  exception.getLineNumber()
		            + ", column " +  exception.getColumnNumber();
	          doc.set(errorMsg);
		 viewer.setDocument(doc);

	   valid = false;
    }

	 public void fatalError(final SAXParseException exception)
	  {
		 errorMsg = "Fatal Error: " +  exception.getMessage();
		 errorMsg += " at line " +  exception.getLineNumber()
		                 + ", column " +  exception.getColumnNumber();
		 doc.set(errorMsg);
		 viewer.setDocument(doc);

     }



	/**
	 * The action has been activated. The argument of the
	 * method represents the 'real' action sitting
	 * in the workbench UI.
	 * @see IWorkbenchWindowActionDelegate#run
	 */
	public void run(IAction action) {
		try {

		IFile fname =((IFileEditorInput)  
PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage().getAc 
tiveEditor().getEditorInput()).getFile();
	       document =  fname.getLocation().toString();

	 parser = new SAXParser();
	 final SampleAction  handler = new SampleAction();
	 parser.setErrorHandler(handler);
	// Turn on validation.

	parser.setFeature("http://xml.org/sax/features/validation";, true);
	parser.setFeature("http://apache.org/xml/features/validation/schema",true) 
;
	 parser.setProperty("http://apache.org/xml/properties/schema/external-
        schemaLocation","http://www.w3.org/1999/xhtmlC:\\XHTML.xsd"; );
	parser.parse(document);


	if (handler.isValid()) {
	     errorMsg = document  + " is valid.";
	    doc.set(errorMsg);
	  viewer.setDocument(doc);
	 }

	 else {
	  // If the document  isn't well-formed, an exception has
	  // already been thrown  and this has been skipped.
	  errorMsg = document + "  is well-formed.";
	 doc.set(errorMsg);
	 viewer.setDocument(doc);
		    }

	 }//try
	catch (SAXParseException err)
		   {
		errorMsg = document + " is not well-formed  at ";
		errorMsg += "Line " + err.getLineNumber()  + ", column " +
                           err.getColumnNumber();
		doc.set(errorMsg);
		viewer.setDocument(doc);
		}

	catch (IOException e)
		{
errorMsg = "Due to an IOException, the  parser could not check " + document;
		doc.set(errorMsg);
		viewer.setDocument(doc);
			 }
			 catch (SAXException e) {
					e.printStackTrace();
		}
}

	/**
	 * Selection in the workbench has been changed. We
	 * can change the state of the 'real' action here
	 * if we want, but this can only happen after
	 * the delegate has been created.
	 * @see IWorkbenchWindowActionDelegate#selectionChanged
	 */
	public void selectionChanged(IAction action, ISelection selection)  {}
	/**
	 * We can use this method to dispose of any system
	 * resources we previously allocated.
	 * @see IWorkbenchWindowActionDelegate#dispose
	 */
	public void dispose() {}

	/**
	 * We will cache window object in order to
	 * be able to provide parent shell for the message dialog.
	 * @see IWorkbenchWindowActionDelegate#init
	 */
	public void init(IWorkbenchWindow window) {
		this.window = window;
		try {
consoleView =  
PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage().showView("org.eclipse.debug.ui.ConsoleView");
	viewer = (TextViewer)((AbstractDebugView)  consoleView).getViewer();
	doc = viewer.getDocument();
				}
	   catch (PartInitException e1) {
			  e1.printStackTrace();
				}


	}
}
===============================================
Plugin.xml

<runtime>
     <library name="validate.jar">
        <export name="*"/>
      </library>
     </runtime>
  <requires>
     <import plugin="org.eclipse.core.resources"/>
     <import plugin="org.eclipse.ui"/>
     <import plugin="org.apache.xerces"/>
     <import plugin="org.eclipse.debug.core"/>
     <import plugin="org.eclipse.debug.ui"/>
     <import plugin="org.eclipse.core.runtime"/>
     <import plugin="org.eclipse.core.boot"/>
     <import plugin="org.eclipse.ui.views"/>
     <import plugin="org.apache.lucene"/>
     <import plugin="org.eclipse.help"/>
     <import plugin="org.eclipse.help.appserver"/>
     <import plugin="org.eclipse.jface"/>
     <import plugin="org.eclipse.jface.text"/>
     <import plugin="org.eclipse.swt"/>
     <import plugin="org.eclipse.text"/>
     <import plugin="org.eclipse.ui.editors"/>
     <import plugin="org.eclipse.ui.workbench"/>
     <import plugin="org.eclipse.ui.workbench.texteditor"/>
     <import plugin="org.eclipse.update.core"/>
  </requires>

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