Working XML: Wrapping up XM version 1

        
public void startElement(String namespaceURI,
                         String localName,
                         String qName,
                         Attributes atts)
   throws SAXException
{
   if(!namespaceURI.equals(this.namespaceURI))
      super.startElement(namespaceURI,localName,qName,atts);
   else
      try
      {
         if(localName.equals("Directory"))
         {
            if(inDirectory)
               messenger.error(new XMException(Resources.getString("nestedelement"),
                                               new Object[] { qName }));
            String dir = atts.getValue("dir");
            if(dir == null || dir.trim().length() == 0)
               messenger.error(new XMException(Resources.getString("dirrequired"),
                               new Object[] { qName }));
            String stValue = atts.getValue("markSource");
            boolean markSource = stValue != null && stValue.equalsIgnoreCase("true");
            if(markSource && sourceFile == null)
               throw new NotImplementedException("Caller has not set the sourceFile but the document wants it marked.");
            File sourceDir = sourceFile != null ? sourceFile.getParentFile() : null,
                 dirFile = null;
            if(sourceDir != null)
               dirFile = new File(sourceDir,dir);
            else
               dirFile = new File(dir);
            directoryReader.read(dirFile,markSource ? sourceFile : null);
            inDirectory = true;
         }
      }
      catch(XMException e)
      {
         throw new SAXException(e);
      }
}