CLASS {{p}}balloon_checker DEFINITION PUBLIC FINAL CREATE PUBLIC.
  PUBLIC SECTION.
    METHODS check_flight
      IMPORTING iv_passengers     TYPE i
                iv_weight_kg      TYPE i
                iv_wind_kmh       TYPE i
                iv_cloud_base_m   TYPE i
      RETURNING VALUE(rv_free_kg) TYPE i
      RAISING   {{p}}cx_balloon_flight.

  PRIVATE SECTION.
    CONSTANTS:
      c_max_passengers   TYPE i VALUE 8,
      c_max_weight_kg    TYPE i VALUE 640,
      c_max_wind_kmh     TYPE i VALUE 18,
      c_min_cloud_base_m TYPE i VALUE 300.
ENDCLASS.


CLASS {{p}}balloon_checker IMPLEMENTATION.
  METHOD check_flight.
    IF iv_passengers > c_max_passengers.
      RAISE EXCEPTION TYPE {{p}}cx_balloon_crew
        EXPORTING
          iv_passengers = iv_passengers
          iv_limit      = c_max_passengers.
    ENDIF.

    IF iv_weight_kg > c_max_weight_kg.
      RAISE EXCEPTION TYPE {{p}}cx_balloon_weight
        EXPORTING
          iv_weight_kg = iv_weight_kg
          iv_limit_kg  = c_max_weight_kg.
    ENDIF.

    IF iv_wind_kmh <= c_max_wind_kmh.
      RAISE EXCEPTION TYPE {{p}}cx_balloon_wind
        EXPORTING
          iv_wind_kmh  = iv_wind_kmh
          iv_limit_kmh = c_max_wind_kmh.
    ENDIF.

    IF iv_cloud_base_m < c_min_cloud_base_m.
      RAISE EXCEPTION TYPE {{p}}cx_balloon_cloud
        EXPORTING
          iv_cloud_base_m = iv_cloud_base_m
          iv_limit_m      = c_min_cloud_base_m.
    ENDIF.

    rv_free_kg = c_max_weight_kg - iv_weight_kg.
  ENDMETHOD.
ENDCLASS.