How can we edit IO_TECH_REQUEST_CONTEXT in the GET_EXPANDED_ENTITY Method of Odata

[former_member208862]

Hi Experts,

I have a requirement to Edit the Importing parameter IO_TECH_REQUEST_CONTEXT inside method

/IWBEP/IF_MGW_APPL_SRV_RUNTIME~GET_EXPANDED_ENTITY.

My purpose is to change the key Values (MR_REQUEST -> KEY_TAB ) of Importing Parameter IO_TECH_REQUEST_CONTEXT. From UI side, I am getting all the Key values separated by Commas, I just want to split it and call the below method in a loop.

cl_rtst_rp_document=>get_instance( )->get_expanded_entity(
exporting
io_tech_request_context = io_tech_request_context
io_expand = io_expand
importing
ers_entity = data(ert_document_entity)
changing
ct_expanded_tech_clauses = et_expanded_tech_clauses
cs_response_context = es_response_context
).

Please suggest. Thanks in Advance.

[arthursilva]

Hello Nisha, hope you're well.

You cannot edit IO_TECH_REQUEST_CONTEXT simply because it's an importing parameter. In OO pattern, importing parameter should not be edit.

In case you need to use key/values pairs, try the following statement below. Once the key/vales are stored in an internal table, you're able to perform any treatment on it.

DATA(lt_keys) = io_tech_request_context->get_source_keys( ) .

KR,
Arthur Silva

[former_member208862]

Hi Arthur,

Thanks for your response!

I can create a copy of the IO_TECH_REQUEST_CONTEXT e.g. LO_REQUEST and use it. That will be fine.

But before I call Method :

CL_RTST_RP_DOCUMENT=>GET_INSTANCE( )->GET_EXPANDED_ENTITY, I want to pass the changed LO_REQUEST with different entries for KEY_TAB.

Is it feasible?

Regards,

Nisha

[Anju_MD]

Did you find a solution for this?

[former_member717718]

Yes, you can “add values” to the values of IO_TECH_REQUEST_CONTEXT...

Do the following (at least BASIS 750, should also work with higher versions)

• Define a class inheriting from /IWBEP/CL_MGW_REQUEST (IO_TECH_REQUEST_CONTEXT is instance of type /IWBEP/CL_MGW_REQUEST), let’s call it LCL_ MGW_REQUEST (possible because not final)
• As the parameter IO_TECH_REQUEST_CONTEXT is an import parameter, clone the object with /IWBEP/CL_MGW_REQUEST->CLONE()
  * Remark: cast IO_TECH_REQUEST_CONTEXT to /IWBEP/CL_MGW_REQUEST to be able to use CLONE()
• Define your method LCL_ MGW_REQUEST ->ADD_ADDITIONAL_VALUE_TO_KEY_TAB() to add values
  Example

Data(original_key_values) = your_clone->mr_request->key_tab
APPEND value#(<>) to original_key_values

• Instead of IO_TECH_REQUEST_CONTEXT, use your_clone to request the data

Note

Of course, the usuall conditions/terms/caution apply concerning robustness, errorhandling and use of not released API's.

[AlexNecula]

Hi Andre,

How would you downcast from /IWBEP/CL_MGW_REQUEST to LCL_ MGW_REQUEST since you cannot use ?= unless the parent was narrowcasted from the child?

Alex

[former_member717718]

Hi Alex,

I guess you are referring to step 3?

No need for a down cast: In a class, inheriting from /iwbep/cl_mgw_request, you have access to the protected members of class- and objects of type /iwbep/cl_mgw_request, especially mr_request

[gustavo_lagreca]

Hello,
You can change the IO_TECH_REQUEST_CONTEXT using the method /IWBEP/IF_MGW_CORE_SRV_RUNTIME~READ_ENTITYSET

in my case it was necessary to stop using a search field coming from a fiori app.

 METHOD /iwbep/if_mgw_core_srv_runtime~read_entityset.
    
    DATA(ls_request_details) = is_request_details. """"SAME THAN IO_TECH_REQUEST_CONTEXT
    IF iv_entity_name  = 'APAROpenItem' AND iv_source_name =  'APAROpenItem'.
      IF line_exists( ls_request_details-parameters[ name = 'search' ] ).
          ls_request_details-parameters[ name = 'search' ]-value = ''.
      ENDIF.
    ENDIF.

    TRY.
        CALL METHOD super->/iwbep/if_mgw_core_srv_runtime~read_entityset
          EXPORTING
            iv_entity_name               = iv_entity_name
            iv_source_name               = iv_source_name
            is_paging                    = is_paging
            it_order                     = it_order
            it_filter_select_options     = it_filter_select_options
            is_request_details           = ls_request_details
            iv_do_return_provider_format = abap_false
          CHANGING
            cv_response_body             = cv_response_body
            ct_headers                   = ct_headers
            cr_entityset                 = cr_entityset
            cr_deleted_entityset         = cr_deleted_entityset
            cs_response_context          = cs_response_context
            ct_inline_info               = ct_inline_info.
      CATCH /iwbep/cx_mgw_busi_exception.
      CATCH /iwbep/cx_mgw_tech_exception.
    ENDTRY.
  ENDMETHOD.