ABAP IDoc Processing: Intermediate Documents for EDI Communication

DATA: lt_edidc TYPE TABLE OF edidc,
      ls_edidc TYPE edidc,
      lt_edidd TYPE TABLE OF edidd,
      ls_edidd TYPE edidd.

" Fill control record
ls_edidc-mestyp = 'ORDERS'.
ls_edidc-idoctp = 'ORDERS05'.
ls_edidc-rcvprt = 'LS'.
ls_edidc-rcvprn = 'PARTNER01'.
ls_edidc-sndprt = 'LS'.
ls_edidc-sndprn = sy-sysid.
APPEND ls_edidc TO lt_edidc.

" Data Segment E1EDK01 - Header
ls_edidd-segnam = 'E1EDK01'.
ls_edidd-sdata = 'Order header data...'.
APPEND ls_edidd TO lt_edidd.

" Data Segment E1EDP01 - Item
ls_edidd-segnam = 'E1EDP01'.
ls_edidd-sdata = 'Item data...'.
APPEND ls_edidd TO lt_edidd.

" Create IDoc
CALL FUNCTION 'IDOC_INBOUND_ASYNCHRONOUS'
  TABLES
    idoc_control_rec_40 = lt_edidc
    idoc_data_rec_40    = lt_edidd.

TYPES: BEGIN OF ty_e1edk01,
         belnr TYPE char35,
         datum TYPE char8,
         waers TYPE char3,
       END OF ty_e1edk01.

DATA: ls_e1edk01 TYPE ty_e1edk01,
      ls_edidd   TYPE edidd.

ls_e1edk01-belnr = '4500000123'.
ls_e1edk01-datum = '20250115'.
ls_e1edk01-waers = 'EUR'.

ls_edidd-segnam = 'E1EDK01'.
ls_edidd-sdata  = ls_e1edk01.  " Structure assignment

APPEND ls_edidd TO lt_edidd.

DATA: lv_docnum  TYPE edi_docnum VALUE '0000000000012345',
      ls_edidc   TYPE edidc,
      lt_edidd   TYPE TABLE OF edidd,
      lt_edids   TYPE TABLE OF edids.

" Read control record
SELECT SINGLE * FROM edidc INTO ls_edidc
  WHERE docnum = lv_docnum.

" Read data records
SELECT * FROM edid4 INTO TABLE lt_edidd
  WHERE docnum = lv_docnum
  ORDER BY segnum.

" Read status records
SELECT * FROM edids INTO TABLE lt_edids
  WHERE docnum = lv_docnum
  ORDER BY countr DESCENDING.

LOOP AT lt_edidd INTO DATA(ls_data).
  WRITE: / ls_data-segnam, ls_data-sdata(50).
ENDLOOP.

DATA: ls_master_idoc TYPE edidc,
      lt_comm_idocs  TYPE TABLE OF edidc.

" Master IDoc parameters
ls_master_idoc-mestyp = 'MATMAS'.
ls_master_idoc-idoctp = 'MATMAS05'.
ls_master_idoc-rcvprt = 'LS'.
ls_master_idoc-rcvprn = 'CLNT800'.

" Trigger IDoc dispatch
CALL FUNCTION 'MASTER_IDOC_DISTRIBUTE'
  EXPORTING
    master_idoc_control            = ls_master_idoc
  TABLES
    communication_idoc_control     = lt_comm_idocs
    master_idoc_data               = lt_edidd
  EXCEPTIONS
    error_in_idoc_control          = 1
    error_writing_idoc_status      = 2
    error_in_idoc_data             = 3
    sending_logical_system_unknown = 4
    OTHERS                         = 5.

IF sy-subrc = 0.
  COMMIT WORK.
  LOOP AT lt_comm_idocs INTO DATA(ls_comm).
    WRITE: / 'IDoc created:', ls_comm-docnum.
  ENDLOOP.
ENDIF.

DATA: lt_status TYPE TABLE OF bdidocstat,
      ls_status TYPE bdidocstat.

ls_status-docnum = lv_docnum.
ls_status-status = '53'.  " Application document posted
ls_status-msgty  = 'S'.
ls_status-msgid  = 'E0'.
ls_status-msgno  = '000'.
ls_status-msgv1  = 'Successfully processed'.
APPEND ls_status TO lt_status.

CALL FUNCTION 'IDOC_STATUS_WRITE_TO_DATABASE'
  EXPORTING
    idoc_number               = lv_docnum
  TABLES
    idoc_status               = lt_status
  EXCEPTIONS
    idoc_foreign_lock         = 1
    idoc_not_found            = 2
    idoc_status_records_empty = 3
    OTHERS                    = 4.

COMMIT WORK.

FUNCTION z_idoc_inbound_orders.
*"----------------------------------------------------------------------
*"  IMPORTING
*"     VALUE(INPUT_METHOD) TYPE  BDWFAP_PAR-INPUTMETHD
*"     VALUE(MASS_PROCESSING) TYPE  BDWFAP_PAR-MASS_PROC
*"  EXPORTING
*"     VALUE(WORKFLOW_RESULT) TYPE  BDWFAP_PAR-RESULT
*"     VALUE(APPLICATION_VARIABLE) TYPE  BDWFAP_PAR-APPL_VAR
*"     VALUE(IN_UPDATE_TASK) TYPE  BDWFAP_PAR-UPDATETASK
*"     VALUE(CALL_TRANSACTION_DONE) TYPE  BDWFAP_PAR-CALLTRANS
*"  TABLES
*"      IDOC_CONTRL STRUCTURE  EDIDC
*"      IDOC_DATA STRUCTURE  EDIDD
*"      IDOC_STATUS STRUCTURE  BDIDOCSTAT
*"      RETURN_VARIABLES STRUCTURE  BDWFRETVAR
*"      SERIALIZATION_INFO STRUCTURE  BDI_SER
*"----------------------------------------------------------------------

  DATA: ls_order TYPE zorder_header,
        ls_item  TYPE zorder_item,
        lt_items TYPE TABLE OF zorder_item.

  LOOP AT idoc_contrl INTO DATA(ls_control).
    " Process IDoc data
    LOOP AT idoc_data INTO DATA(ls_data)
      WHERE docnum = ls_control-docnum.

      CASE ls_data-segnam.
        WHEN 'Z1ORDER_HEADER'.
          ls_order = ls_data-sdata.

        WHEN 'Z1ORDER_ITEM'.
          ls_item = ls_data-sdata.
          APPEND ls_item TO lt_items.
      ENDCASE.
    ENDLOOP.

    " Create order
    TRY.
        " Business logic here

        " Success status
        DATA(ls_status) = VALUE bdidocstat(
          docnum = ls_control-docnum
          status = '53'
          msgty  = 'S'
          msgid  = 'ZMM'
          msgno  = '001' ).
        APPEND ls_status TO idoc_status.

      CATCH cx_root INTO DATA(lx_error).
        " Error status
        ls_status = VALUE #(
          docnum = ls_control-docnum
          status = '51'
          msgty  = 'E'
          msgid  = 'ZMM'
          msgno  = '002'
          msgv1  = lx_error->get_text( ) ).
        APPEND ls_status TO idoc_status.
    ENDTRY.
  ENDLOOP.

ENDFUNCTION.

" Read distribution model
DATA: lt_receivers TYPE TABLE OF bdcp_receiver.

CALL FUNCTION 'ALE_MODEL_DETERMINE_RECEIVERS'
  EXPORTING
    message_type           = 'MATMAS'
    sending_logical_system = 'SRCCLNT100'
  TABLES
    receivers              = lt_receivers
  EXCEPTIONS
    no_entry_in_model      = 1
    OTHERS                 = 2.

LOOP AT lt_receivers INTO DATA(ls_receiver).
  WRITE: / 'Receiver:', ls_receiver-rcvprn.
ENDLOOP.

SELECT edidc~docnum, edidc~status, edidc~credat, edidc~cretim,
       edidc~mestyp, edidc~idoctp, edidc~rcvprn
  FROM edidc
  WHERE mestyp = 'ORDERS'
    AND status IN ('51', '56')  " Error status
    AND credat >= @( sy-datum - 7 )
  INTO TABLE @DATA(lt_error_idocs).

LOOP AT lt_error_idocs INTO DATA(ls_idoc).
  WRITE: / ls_idoc-docnum, ls_idoc-status, ls_idoc-credat.
ENDLOOP.

DATA: lt_docnum TYPE TABLE OF edi_docnum.

APPEND lv_docnum TO lt_docnum.

CALL FUNCTION 'EDI_DOCUMENT_OPEN_FOR_PROCESS'
  EXPORTING
    document_number        = lv_docnum
  EXCEPTIONS
    document_foreign_lock  = 1
    document_not_exist     = 2
    document_not_open      = 3
    status_is_unable_proc  = 4
    OTHERS                 = 5.

IF sy-subrc = 0.
  " Reprocess IDoc
  CALL FUNCTION 'IDOC_INBOUND_SINGLE'
    EXPORTING
      pi_idoc_number       = lv_docnum
    EXCEPTIONS
      parameter_error      = 1
      idoc_not_found       = 2
      lock_error           = 3
      OTHERS               = 4.

  CALL FUNCTION 'EDI_DOCUMENT_CLOSE_PROCESS'
    EXPORTING
      document_number = lv_docnum.
ENDIF.

" Activate change pointers (BD52/BD61)
" BD50: Message Type <-> Object
" BD52: Change Pointer active

" Create change pointer manually
DATA: lt_cp TYPE TABLE OF bdcp2.

APPEND VALUE #(
  mestyp = 'MATMAS'
  objkey = 'MATNR'
  tabkey = '000000000000100000'
  chngid = 'U'
  cdchgid = sy-datum
  cdchgtm = sy-uzeit
) TO lt_cp.

CALL FUNCTION 'CHANGE_POINTERS_CREATE'
  TABLES
    change_pointers = lt_cp.

" Process change pointers (RBDMIDOC)
CALL FUNCTION 'RBDMIDOC'
  EXPORTING
    mestyp = 'MATMAS'.

" Dynamic segment mapping
DATA: lo_struct TYPE REF TO cl_abap_structdescr.

LOOP AT lt_edidd INTO DATA(ls_segment).
  " Determine structure for segment
  DATA(lv_segdef) = 'E1' && ls_segment-segnam+2.

  TRY.
      lo_struct ?= cl_abap_typedescr=>describe_by_name( lv_segdef ).

      DATA: lr_data TYPE REF TO data.
      CREATE DATA lr_data TYPE HANDLE lo_struct.
      ASSIGN lr_data->* TO FIELD-SYMBOL(<fs_segment>).

      " Transfer data
      <fs_segment> = ls_segment-sdata.

      " Process fields
      LOOP AT lo_struct->components INTO DATA(ls_comp).
        ASSIGN COMPONENT ls_comp-name OF STRUCTURE <fs_segment>
          TO FIELD-SYMBOL(<fs_value>).
        IF sy-subrc = 0.
          WRITE: / ls_comp-name, '=', <fs_value>.
        ENDIF.
      ENDLOOP.

    CATCH cx_sy_move_cast_error.
      " Unknown segment
  ENDTRY.
ENDLOOP.

DATA: lt_edidc TYPE TABLE OF edidc40,
      lt_edidd TYPE TABLE OF edidd40.

" Build control and data records...

" Send IDoc to RFC destination
CALL FUNCTION 'IDOC_INBOUND_ASYNCHRONOUS'
  DESTINATION 'RFC_DEST_TARGET'
  TABLES
    idoc_control_rec_40 = lt_edidc
    idoc_data_rec_40    = lt_edidd
  EXCEPTIONS
    system_failure      = 1
    communication_failure = 2.

IF sy-subrc = 0.
  WRITE: / 'IDoc sent successfully'.
ELSE.
  WRITE: / 'Error sending IDoc'.
ENDIF.

" Serialization for dependent IDocs
DATA: lt_serial TYPE TABLE OF bdi_ser.

" Define serialization object
APPEND VALUE #(
  session = '001'
  rcvpor  = 'SAPEDI'
  rcvprt  = 'LS'
  rcvprn  = 'TARGET'
  mestyp  = 'ORDERS'
  serial  = 'ORDERS_SERIAL'
) TO lt_serial.

" Send IDoc with serialization
CALL FUNCTION 'IDOC_INBOUND_ASYNCHRONOUS'
  TABLES
    idoc_control_rec_40 = lt_edidc
    idoc_data_rec_40    = lt_edidd
    idoc_serialization  = lt_serial.