isDirectColumnRef = false; compileColumnExpression( expression, mode ); return isDirectColumnRef;
ExpressionParserUtility util = new ExpressionParserUtility(); util.isDirectColumnRef = false; compileColumnExpression( util, expression, mode ); return util.isDirectColumnRef;
	static boolean isDirectColumnRef( String expression, boolean mode )			throws BirtException	{		isDirectColumnRef = false;		compileColumnExpression( expression, mode );		return isDirectColumnRef;	}