public static List extractColumnExpressions( String oldExpression, boolean mode ) throws BirtException
public static List extractColumnExpressions( String oldExpression ) throws BirtException
	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 );	}