if ( oldExpression == null || oldExpression.trim( ).length( ) == 0 ) return new ArrayList( );  return ExpressionParserUtility.compileColumnExpression( oldExpression, mode );
return extractColumnExpressions( oldExpression, true );
	public static List extractColumnExpressions( String oldExpression,			boolean mode ) throws BirtException	{		if ( oldExpression == null || oldExpression.trim( ).length( ) == 0 )			return new ArrayList( );		return ExpressionParserUtility.compileColumnExpression( oldExpression,				mode );	}