REPORT zgos_api.

DATA ls_appl_object     TYPE gos_s_obj.

DATA lo_gos_api         TYPE REF TO cl_gos_api.

DATA lt_attachment_list TYPE gos_t_atta.

DATA lt_role_filter     TYPE gos_t_rol.

DATA ls_attachment   TYPE gos_s_atta.

DATA ls_attachm_cont TYPE gos_s_attcont.

DATA ls_atta_key     TYPE gos_s_attkey.

DATA: lv_id  TYPE matnr VALUE '16',

      lt_att TYPE TABLE OF sibflporb.

CALL FUNCTION 'CONVERSION_EXIT_MATN1_INPUT'

  EXPORTING

    input  = lv_id

  IMPORTING

    output = lv_id.

ls_appl_object-typeid = 'BUS1001006'.

ls_appl_object-instid = lv_id.

ls_appl_object-catid  = 'BO'.

START-OF-SELECTION.

  TRY.

      lo_gos_api = cl_gos_api=>create_instance( ls_appl_object ).

      APPEND cl_gos_api=>c_attachment TO lt_role_filter.

      lt_attachment_list = lo_gos_api->get_atta_list( lt_role_filter ).

    CATCH cx_gos_api INTO DATA(error).

      WRITE:/ error->get_text( ).

      RETURN.

  ENDTRY.

  DATA: ls_key TYPE gos_s_attkey.

  LOOP AT lt_attachment_list ASSIGNING FIELD-SYMBOL(<id>).

    ls_key-atta_id = <id>-atta_id.

    ls_key-atta_cat = <id>-atta_cat.

    DATA(ls) = lo_gos_api->get_al_item( ls_key ).

  ENDLOOP.