Create structure and Classes

Create Structure

创建structure结构如下

Create Class ZCL_CONATINER

ZCL_CONATINER用于存储UIBB的DATA，其没有method，只有一个attribute。

Create Class ZCL_CONNECTOR

ZCL_CONNECTOR 作为wire schema的connector class，在interface中引入IF_FPM_CONNECTOR，IF_FPM_CONNECTOR_DEF，IF_FPM_CONNECTOR_RUN，在attribute中引入MO_CONTAINER与 MV_PORT_TYPE，在方法中添加 CLASS_CONSTRUCTOR。

实现相应的方法

METHOD if_fpm_connector_run~get_output.
* Set container data as output
  ro_output = mo_container.
ENDMETHOD.

METHOD if_fpm_connector_run~is_create_allowed.
* Entity creation is not possible
  rv_allowed = abap_false.
ENDMETHOD.

METHOD if_fpm_connector_def~initialize.
* Set value to port type and wire label
  mv_port_type = iv_port_type.
  if_fpm_connector_def~mv_wire_label = 'Identity'. " hard code just for example, you can create text element
ENDMETHOD.

METHOD if_fpm_connector_def~set_input.
* set input data to container
  mo_container ?= io_input.
ENDMETHOD.

METHOD class_constructor.
* It's generally to set 'FBI' as sv_namespace
  if_fpm_connector~sv_namespace = 'FBI'.
ENDMETHOD.

Create Class ZCL_INITIAL_FORM_UIBB_FDR

创建ZCL_INITIAL_FORM_UIBB_FDR作为 initial page 中 FORM GUIBB 的 feeder class，引入接口IF_FPM_GUIBB，IF_FPM_GUIBB_FORM，IF_FPM_FEEDER_MODEL，添加 attributes MO_DATA，MS_OBJECT_KEY

实现相应的方法

METHOD if_fpm_feeder_model~get_inport_key.
* Provide the inport object key
  GET REFERENCE OF ms_object_key INTO rr_object_key.
ENDMETHOD.

METHOD if_fpm_feeder_model~get_namespace.
* Get namespace, the namespace is what you set in connector class zcl_fpm_connector
  rv_namespace = 'FBI'.
ENDMETHOD.

METHOD if_fpm_feeder_model~get_outports.
* Maintain outports
  DATA: ls_outport TYPE if_fpm_feeder_model=>ty_s_port.
  CLEAR et_outport.
  GET REFERENCE OF ms_object_key INTO ls_outport-object_key.
  ls_outport-type = if_fpm_feeder_model=>cs_port_type-selection.
  ls_outport-identifier = 'SE'.
  ls_outport-description = 'Selection'.
  INSERT ls_outport INTO TABLE et_outport.
  GET REFERENCE OF ms_object_key INTO ls_outport-object_key.
  ls_outport-type = if_fpm_feeder_model=>cs_port_type-collection.
  ls_outport-identifier = 'CO'.
  ls_outport-description = 'Collection'.
  INSERT ls_outport INTO TABLE et_outport.
ENDMETHOD.


METHOD if_fpm_feeder_model~get_outport_data.
* Create container instance
  IF mo_data IS NOT BOUND.
    CREATE OBJECT mo_data.
  ENDIF.
  ro_data ?= mo_data.
ENDMETHOD.

METHOD if_fpm_guibb_form~flush.
* This method can achieve the new value in UI
  DATA: ls_change_log TYPE fpmgb_s_changelog,
        lv_name TYPE name_komp.
  FIELD-SYMBOLS: <fs_userid> TYPE /bobf/conf_key.
* Field name in screen
  lv_name = 'USERID'.
* set the new value to container
  READ TABLE it_change_log INTO ls_change_log WITH KEY name = lv_name.
  IF sy-subrc = 0.
    ASSIGN ls_change_log-new_value->* TO <fs_userid>.
    mo_data->mo_container = <fs_userid>.
  ENDIF.
ENDMETHOD.

METHOD if_fpm_guibb_form~get_definition.
*  This method is mandatory for feeder class
*  For all variants
  eo_field_catalog ?= cl_abap_typedescr=>describe_by_name( 'ZFPM_STR' )."structure name
ENDMETHOD.
 
METHOD if_fpm_guibb~initialize.
* Create instance for container
  CREATE OBJECT mo_data.
ENDMETHOD.

Create Class ZCL_MAIN_FORM_UIBB_FDR

与前面类似，创建ZCL_MAIN_FORM_UIBB_FDR作为 main page 中 FORM GUIBB 的 feeder class，引入接口IF_FPM_GUIBB，IF_FPM_GUIBB_FORM，IF_FPM_FEEDER_MODEL，添加 attributes MO_DATA，MS_OBJECT_KEY，MO_CONNECTOR

实现相应的方法

METHOD if_fpm_feeder_model~get_inport_key.
*  Get inport key
  GET REFERENCE OF ms_object_key INTO rr_object_key.
ENDMETHOD.

METHOD if_fpm_feeder_model~get_namespace.
  rv_namespace = 'FBI'.
ENDMETHOD.

METHOD if_fpm_feeder_model~set_connector.
*  Set connector
  mo_connector ?= io_connector.
ENDMETHOD.

METHOD if_fpm_guibb_form~get_data.
* Set data to UI
  DATA: lv_name TYPE name_komp.
  FIELD-SYMBOLS: <fs_userid> TYPE /bobf/conf_key.
* Get data from connector
  mo_data ?= mo_connector->if_fpm_connector_run~get_output( ).
* Set data to field 'USERID'
  ASSIGN COMPONENT 'USERID' OF STRUCTURE cs_data TO <fs_userid>.
  <fs_userid> = mo_data->mo_container.
* Set data changed flag
  ev_data_changed = abap_true.
ENDMETHOD.

METHOD if_fpm_guibb_form~get_definition.
* This method is mandatory
* For all variants
  eo_field_catalog ?= cl_abap_typedescr=>describe_by_name( 'ZFPM_STR' ).
ENDMETHOD.