def validate_feature_search_input(self, parameters):
        # Check that the input contains only allowed fields
        for field, keyword in parameters.items():
            if field not in self.feature_search_valid_fields:
                raise InvalidFieldException(", ".join([self.get_datatype_identifier(), field, keyword]))

        # At least one field has to have a non-empty keyword
        found_field = False
        for field, keyword in parameters.items():
            if len(keyword) > 0:
                found_field = True
                continue

        if not found_field:
            raise EmptyQueryException(self.get_datatype_identifier())
 def validate_field_search_input(self, keyword, field):
     if field not in self.field_search_valid_fields:
         raise InvalidFieldException("MIRN", keyword, field)