How to read value of OVS Input field on pressinf of F4

Question

In my case I have to read value from context node as I am skipping the phase 1 of  on OVS PHASE MODEL
but not sure how to read the value from context element
METHOD on_ovs .
  DATA: lo_nd TYPE REF TO if_wd_context_node,
        lo_el TYPE REF TO if_wd_context_element,
        lo_el_parent TYPE REF TO if_wd_context_element.
  lo_el = wdevent->get_context_element( name = 'OVS_CONTEXT_ELEMENT' ).
  lo_el_parent = lo_el->get_node( )->get_parent_element( ).
  DATA: criteria TYPE string.
  DATA text TYPE string.
  lo_el->get_attribute( EXPORTING name = 'ATTR_TEXT' IMPORTING value = text ).
  DATA: ls_search_input  TYPE cl_grac_feeder_role_search=>lty_stru_input,
        lt_select_list   TYPE STANDARD TABLE OF cl_grac_feeder_role_search=>lty_stru_list,
        ls_text          TYPE wdr_name_value,
        lt_label_texts   TYPE wdr_name_value_list,
        lt_column_texts  TYPE wdr_name_value_list,
        lv_window_title  TYPE string,
        lv_table_header  TYPE string.
  FIELD-SYMBOLS: <ls_query_params> TYPE cl_grac_feeder_role_search=>lty_stru_input,
                 <ls_selection>    TYPE cl_grac_feeder_role_search=>lty_stru_list.
  CASE ovs_callback_object->phase_indicator.
    WHEN if_wd_ovs=>co_phase_0.  "configuration phase, may be omitted
  in this phase you have the possibility to define the texts,
  if you do not want to use the defaults (DDIC-texts)
     lt_label_texts =  wd_this->get_ovs_label_texts( criteria ).
     lt_column_texts = wd_this->get_ovs_column_texts( criteria ).
     lv_window_title = wd_this->get_ovs_window_title( criteria ).
     lv_table_header = wd_this->get_ovs_table_header( criteria ).
     lv_window_title = wd_assist->get_text( `003` ).
     lv_table_header = wd_assist->get_text( `004` ).
      CASE text.
        WHEN 'SYSTEM'.
          ls_text-name = `CONNECTORID`.
          ls_text-value = `System`.
          INSERT ls_text INTO TABLE lt_label_texts.
          lv_window_title = ls_text-value.
          lv_table_header = ls_text-value.
          lt_column_texts = lt_label_texts.
        when 'PERMISSION' .
          return.
        when 'ACTION'.
          RETURN.
      ENDCASE.
      ovs_callback_object->set_configuration(
                label_texts  = lt_label_texts
                column_texts = lt_column_texts
                window_title = lv_window_title
                table_header = lv_table_header ).
    WHEN if_wd_ovs=>co_phase_1.  "set search structure and defaults
  In this phase you can set the structure and default values
  of the search structure. If this phase is omitted, the search
  fields will not be displayed, but the selection table is
  displayed directly.
  Read values of the original context (not necessary, but you
  may set these as the defaults). A reference to the context
  element is available in the callback object.
     ovs_callback_object->context_element->get_static_attributes(
         IMPORTING static_attributes = ls_search_input ).
    pass the values to the OVS component
     ovs_callback_object->set_input_structure(
         input = ls_search_input ).
      CASE text.
        WHEN 'SYSTEM'.
      DATA: l_conn TYPE grac_s_grfncgrpconlk.
          ovs_callback_object->set_input_structure( EXPORTING input = l_conn ).
      ENDCASE.
    WHEN if_wd_ovs=>co_phase_2.
  If phase 1 is implemented, use the field input for the
  selection of the table.
  If phase 1 is omitted, use values from your own context.
     IF ovs_callback_object->query_parameters IS NOT BOUND.
TODO exception handling
     ENDIF.
     ASSIGN ovs_callback_object->query_parameters->*
                             TO <ls_query_params>.
     IF NOT <ls_query_params> IS ASSIGNED.
TODO exception handling
     ENDIF.
    call business logic for a table of possible values
    lt_select_list = ???
     DATA: l_data TYPE grac_t_bproc.
     DATA: ls_data TYPE REF TO data.
     DATA: l_stru TYPE REF TO cl_abap_tabledescr.
     l_stru ?= cl_abap_tabledescr=>describe_by_name( 'GRAC_T_BPROC' ).
     CREATE DATA ls_data TYPE HANDLE l_stru.
     wd_this->get_ovs_selection_list( EXPORTING iv_criteria = criteria IMPORTING rt_list = l_data ).
     "ASSIGN l_data->* to <lt_list>.
     ovs_callback_object->set_output_table( output = l_data ).
      "ovs_callback_object->set_output_table( output = lt_select_list ).
      FIELD-SYMBOLS: <fs_query_params> TYPE cl_grac_feeder_role_search=>lty_stru_input1,
      <fs_selection>    TYPE cl_grac_feeder_role_search=>lty_stru_list.
      DATA lv_connector_grp TYPE grfn_connectorgrp.
      IF ovs_callback_object->query_parameters IS NOT BOUND.
TODO exception handling
      ENDIF.
      ASSIGN ovs_callback_object->query_parameters->*
      TO <fs_query_params>.
      IF NOT <fs_query_params> IS ASSIGNED.
TODO exception handling
      ELSE.
        lv_connector_grp =  <fs_query_params>-field1.
      ENDIF.
     IF lv_connector_grp IS INITIAL.
       lv_connector_grp = '*'.
     ENDIF.
      CASE text.
        WHEN 'SYSTEM'.
          DATA: lt_system_list TYPE grac_t_grfncgrpconlk.
          FIELD-SYMBOLS: <ls_system> LIKE LINE OF lt_system_list.
          cl_grfn_cci_ts_configuration=>get_group_connectors(
            EXPORTING
              iv_connector_grp    = lv_connector_grp
             iv_no_authority_chk = ABAP_FALSE
            IMPORTING
              rt_connectors       = lt_system_list
          ovs_callback_object->set_output_table( output = lt_system_list ).
          WHEN 'ACTION'.
            data lt_action_output TYPE TABLE OF cl_grac_feeder_role_search=>t_action_list.
            ovs_callback_object->set_output_table( output = lt_action_output ).
          WHEN 'PERMISSION'.
            DATA: lt_perm TYPE TABLE OF cl_grac_feeder_role_search=>t_permission_list.
      ovs_callback_object->set_output_table( OUTPUT = lt_perm ).
      ENDCASE.
    WHEN if_wd_ovs=>co_phase_3.
      FIELD-SYMBOLS <system> TYPE grac_s_grfncgrpconlk.
      CASE text.
        WHEN 'SYSTEM'.
          ASSIGN ovs_callback_object->selection->* TO <system>.
          IF <system> IS ASSIGNED.
            ovs_callback_object->context_element->set_attribute(
            name  = 'INPUT1_SYSTEM'
            value = <system>-connector ).
            wd_this->mv_connectorid = <system>-connector.
          ENDIF.
      ENDCASE.
  ENDCASE.
ENDMETHOD.

Answer 1

Hi,
It depends how you are setting your parameter also as there are different types of parameters in portal. The best is to use the page level parameters..
Please read the developers gide Section 8.3 for more details....
The link is :-
http://download-east.oracle.com/docs/cd/B14099_19/portal.1014/b14135/pdg_pdk_plsql.htm#CHDGAHCF
Guneet