String firstline = ((LineNumberReader)this.reader).readLine().trim();
String firstline = reader.readLine();
	private void verifyFile() throws ParseException, IOException	{		/* might call a DTD validator here, or just check for the 		 * existence of a few elements from the xml file that we are expecting. 		 */		String match = new String(XMLConstants.FILEMATCH);		String firstline = ((LineNumberReader)this.reader).readLine().trim();		if ( !(firstline.startsWith(match)))		{			throw new ParseException("File Type does not match");		}		}