FUNCTION acyclic_product_definition_relationship

(* SCHEMA building_design_schema; *)

  FUNCTION acyclic_product_definition_relationship(
               relation: product_definition_relationship;
               relatives: SET OF product_definition;
               specific_relation: STRING
      ): LOGICAL;

    LOCAL
      i               : INTEGER;
      x               : SET OF product_definition_relationship;
      local_relatives : SET OF product_definition;
    END_LOCAL;
    REPEAT i := 1 TO HIINDEX(relatives) BY 1;
      IF relation.relating_product_definition :=: relatives[i] THEN
        RETURN(FALSE);
      END_IF;
    END_REPEAT;
    x := bag_to_set(USEDIN(relation.relating_product_definition,
        specific_relation));
    local_relatives := relatives + relation.relating_product_definition;
    IF SIZEOF(x) > 0 THEN
      REPEAT i := 1 TO HIINDEX(x) BY 1;
        IF NOT acyclic_product_definition_relationship(x[i],
            local_relatives,specific_relation) THEN
          RETURN(FALSE);
        END_IF;
      END_REPEAT;
    END_IF;
    RETURN(TRUE);

  END_FUNCTION; -- acyclic_product_definition_relationship

Referenced By

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2012-03-27T17:18:14-04:00