parserTracker = new ServiceTracker(main.context, ParserConstants.SAX_FACTORY_CLASS, null);
this.main = main; parserTracker = new ServiceTracker(main.context, ParserConstants.SAX_FACTORY_CLASS, this);
	public Parser(Activator main) {		parserTracker = new ServiceTracker(main.context, ParserConstants.SAX_FACTORY_CLASS, null);		parserTracker.open();	}