topic Re: Handle null value as input to BAPI-X structure dynamically. in Application Development and Automation Discussions

Handle null value as input to BAPI-X structure dynamically.

koolspy_ultimate — Wed, 03 Jun 2020 18:05:50 GMT

Hi All,

Could you please suggest how to input null value / 0 / Space to bapix structures.

To be more accurate please find the below example.

BAPI: BAPI_MATERIAL_SAVEREPLICA

Field XCHPF (It accepts only "X" or "").

currently I am update the plantdatax-xchpf as following:

lw-xchpf = 'X'.
append lw to lt_plant.

If lw-xchpf is not initial.
 lw_plantx-xchpf = 'X'.
endif.
append lw_plantx to lt_plantx.

The above is working fine. (Note: I am trying to make the solution dynamic)

Now I have a scenario where I need to update the value to null.

lw-xchpf = ''.
append lw to lt_plant.

If lw-xchpf is not initial. "------This is causing Issue
 lw_plantx-xchpf = 'X'.
endif.
append lw_plantx to lt_plantx.

Thanks in Advance.

Re: Handle null value as input to BAPI-X structure dynamically.

Sandra_Rossi — Wed, 03 Jun 2020 19:45:45 GMT

What issue do you have? ("if lw-xchpf is not initial ... causing Issue" is not a symptom)

You say "null value / 0 / Space", it's rather imprecise, can you explain what you mean? (why different terms?)

Re: Handle null value as input to BAPI-X structure dynamically.

MateuszAdamus — Wed, 03 Jun 2020 20:09:00 GMT

Hello koolspy.ultimate

You could write a method (or a procedure) which uses ABAP RTTI for this. Example:

CLASS lcl_test DEFINITION.
  PUBLIC SECTION.
    CLASS-METHODS:
      mark_x
        IMPORTING
          iv_filled_only TYPE flag
          is_structure   TYPE any
        CHANGING
          cs_structure_x TYPE any.
ENDCLASS.

CLASS lcl_test IMPLEMENTATION.
  METHOD mark_x.
    DATA:
      lo_type_table     TYPE REF TO cl_abap_tabledescr,
      lo_type_structure TYPE REF TO cl_abap_structdescr.

    DATA(lo_type) = cl_abap_typedescr=>describe_by_data( p_data = is_structure ).
    CASE lo_type->kind.
      WHEN cl_abap_typedescr=>kind_struct.
        lo_type_structure ?= lo_type.
    ENDCASE.
    CHECK lo_type_structure IS BOUND.

    DATA(lt_components) = lo_type_structure->get_components( ).
    LOOP AT lt_components REFERENCE INTO DATA(ld_component).
      ASSIGN COMPONENT ld_component->name OF STRUCTURE cs_structure_x TO FIELD-SYMBOL(<lv_field_x>).
      CHECK sy-subrc = 0.

      IF iv_filled_only = abap_true.
        ASSIGN COMPONENT ld_component->name OF STRUCTURE is_structure TO FIELD-SYMBOL(<lv_field>).
        CHECK sy-subrc = 0
          AND <lv_field> IS NOT INITIAL.
      ENDIF.

      <lv_field> = abap_true.
    ENDLOOP.
  ENDMETHOD.
ENDCLASS.

" then, the usage
IF something = abap_true OR something_else = abap_true.
  lv_filled_only = abap_true.
ELSE.
  lv_filled_only = abap_false.
ENDIF.

lcl_test=>mark_x(
  EXPORTING iv_filled_only = lv_filled_only is_structure = ls_values
  CHANGING cs_structure_x = ls_values_x ).<br>

The LS_VALUES structure from the example does not have to be the same as the BAPI's values structure. It can be a structure of any type. The important thing is that at least some of its fields have the same name as the BAPI's structure. These fields will have their X filled by the MARK_X method.

Kind regards,

Mateusz

Re: Handle null value as input to BAPI-X structure dynamically.

koolspy_ultimate — Thu, 04 Jun 2020 04:39:26 GMT

Hi Sandra Rossi,

I mean how to pass empty value as input considering the if condition for updating the bapix structure.