INTERFACE {{p}}if_stock_age PUBLIC.
  TYPES:
    ty_material TYPE c LENGTH 10,
    ty_batch_id TYPE c LENGTH 10,
    ty_bucket   TYPE c LENGTH 2,
    ty_quantity TYPE p LENGTH 13 DECIMALS 3,
    BEGIN OF ty_batch,
      material TYPE ty_material,
      batch    TYPE ty_batch_id,
      quantity TYPE ty_quantity,
      gr_date  TYPE dats,
    END OF ty_batch,
    tt_batch TYPE STANDARD TABLE OF ty_batch WITH EMPTY KEY,
    BEGIN OF ty_age_row,
      material    TYPE ty_material,
      bucket      TYPE ty_bucket,
      quantity    TYPE ty_quantity,
      batch_count TYPE i,
    END OF ty_age_row,
    tt_age_row TYPE STANDARD TABLE OF ty_age_row WITH EMPTY KEY,
    BEGIN OF ty_total,
      material    TYPE ty_material,
      quantity    TYPE ty_quantity,
      batch_count TYPE i,
    END OF ty_total,
    tt_total TYPE STANDARD TABLE OF ty_total WITH EMPTY KEY.

  CONSTANTS:
    BEGIN OF c_bucket,
      d0_30    TYPE ty_bucket VALUE '01',
      d31_60   TYPE ty_bucket VALUE '02',
      d61_90   TYPE ty_bucket VALUE '03',
      d91_plus TYPE ty_bucket VALUE '04',
    END OF c_bucket.

  METHODS analyze
    IMPORTING it_batch      TYPE tt_batch
              iv_key_date   TYPE dats
    RETURNING VALUE(rt_age) TYPE tt_age_row.

  METHODS total_by_material
    IMPORTING it_batch        TYPE tt_batch
              iv_key_date     TYPE dats
    RETURNING VALUE(rt_total) TYPE tt_total.
ENDINTERFACE.