Example of ABAP DPC_EXT code for mapping bapi warning to UI5 field without an Exception

myentityset_update_entity

 METHOD myentityset_update_entity.

    io_data_provider->read_entry_data( IMPORTING es_data = er_entity ).

*--- get the context path from the request uri
    DATA(lt_headers) = /iwbep/if_mgw_conv_srv_runtime~get_dp_facade( )->get_request_header( ).
    DATA(lv_request_uri) = lt_headers[ name = '~request_uri' ]-value.
    DATA(lv_context_path) = match( val = lv_request_uri regex = `/([^\/]+)\/?$` ).
    DATA(lv_message_target) = lv_context_path && |/Field1|. "/MyEntity('Key')/Field1

    DATA lt_msg_types TYPE TABLE OF char1.

*--- determine which messages to show
    IF er_entity-show_warning = abap_true.
      APPEND /iwbep/if_message_container=>gcs_message_type-warning TO lt_msg_types.
    ENDIF.
    IF er_entity-show_info EQ abap_true.
      APPEND /iwbep/if_message_container=>gcs_message_type-info TO lt_msg_types.
    ENDIF.
    IF er_entity-show_success EQ abap_true.
      APPEND /iwbep/if_message_container=>gcs_message_type-success TO lt_msg_types.
    ENDIF.
    IF er_entity-show_error EQ abap_true.
      APPEND /iwbep/if_message_container=>gcs_message_type-error TO lt_msg_types.
    ENDIF.

    DATA lt_return TYPE STANDARD TABLE OF bapiret2.

    LOOP AT lt_msg_types ASSIGNING FIELD-SYMBOL(<fs_msg_type>).
      " create bapi message
      APPEND INITIAL LINE TO lt_return ASSIGNING FIELD-SYMBOL(<fs_return>).

      MESSAGE ID '00' TYPE <fs_msg_type> NUMBER 001
         INTO <fs_return>-message
         WITH |message { sy-tabix } type { <fs_msg_type> } value { er_entity-field1 }|.

      CALL FUNCTION 'BALW_BAPIRETURN_GET2'
        EXPORTING
          type   = sy-msgty
          cl     = sy-msgid
          number = sy-msgno
          par1   = sy-msgv1
        IMPORTING
          return = <fs_return>.

*--- only link Errors and Warning to the target field
      <fs_return>-field = COND #( WHEN <fs_msg_type> = /iwbep/if_message_container=>gcs_message_type-warning THEN lv_message_target
                                  WHEN <fs_msg_type> = /iwbep/if_message_container=>gcs_message_type-error THEN lv_message_target
                                  ELSE ||  ).

    ENDLOOP.

    LOOP AT lt_return ASSIGNING <fs_return>.
      " add message from bapi structure
      mo_context->get_message_container( )->add_message_from_bapi(
      EXPORTING is_bapi_message   = <fs_return>
        iv_entity_type = iv_entity_set_name
        it_key_tab = VALUE /iwbep/t_mgw_name_value_pair( ( name = 'KEY1' value = er_entity-key1 ) )
        iv_add_to_response_header = boolc( er_entity-throw_exception = abap_false )
        iv_message_target = CONV string( <fs_return>-field ) ).
    ENDLOOP.

    IF er_entity-throw_exception = abap_true.
      RAISE EXCEPTION TYPE /iwbep/cx_mgw_busi_exception
        EXPORTING
          message_container = mo_context->get_message_container( ).
    ENDIF.

    MODIFY zodata_warning FROM er_entity.

  ENDMETHOD.