def __validInputs(self):
        """Validates the inputs of the constructor."""
        #if not isinstance(self.__column, Column):
        #    raise Sitools2Exception("column must be an instance of Column") 
        if self.__type not in self.__TYPE:
            raise Sitools2Exception("Type must be one of these values : numeric, string, boolean")
        if self.__comparison not in self.__COMPARISON:
            raise Sitools2Exception("Comparison must be one of these values : LT, GT, EQ, LIKE, IN, NOTIN")