Resolving data-reference at runtime ( cl_abap_typedescr)

Hi all,
At runtime, I need to find out if a data-reference of created data
refers to a data-element or not.
In will give you an example of what I mean:
data: dummy         TYPE bukrs,
      descr_ref     TYPE REF TO cl_abap_typedescr,
      descr_datael TYPE REF TO cl_abap_elemdescr,
      p_datael      type string value ''.
descr_ref = cl_abap_typedescr=>describe_by_data( dummy ).
MOVE descr_ref ?TO descr_datael.
p_datael = descr_datael->help_id. "p_datael has now value BUKRS
How is this done, if we work with a datareferences?
I'm pretty sure it should be feasible - but I'm stuck here...
Task: same as above - find out data-element of dummy.
data: dummy         TYPE ref to data,
      descr_ref     TYPE REF TO cl_abap_typedescr,
      descr_datael TYPE REF TO cl_abap_elemdescr,
      p_datael      type string value ''.
create dummy type bukrs.
descr_ref = cl_abap_typedescr=>describe_by_data( dummy ).
"descr_ref->type_kind this time indicates, that we work with referenced data.
"How to progress from here on?
Thanks in advance. Points will be granted if issue can be solved!

Hello Edwin
The sample report ZUS_SDN_RTTI_DATA_ELEMENT shows how to address your question.
*& Report ZUS_SDN_RTTI_DATA_ELEMENT
*& Thread: resolving data-reference at runtime ( cl_abap_typedescr)
*& <a class="jive_macro jive_macro_thread" href="" __jive_macro_name="thread" modifiedtitle="true" __default_attr="770681"></a>
REPORT zus_sdn_rtti_data_element.
DATA: gdo_dummy         TYPE REF TO data,
      go_typedescr      TYPE REF TO cl_abap_typedescr,
      go_elemdescr      TYPE REF TO cl_abap_elemdescr,
      p_datael      TYPE string VALUE ''.
PARAMETERS:
p_rolln   TYPE rollname DEFAULT 'BUKRS'.
START-OF-SELECTION.
CREATE DATA gdo_dummy TYPE (p_rolln).
go_typedescr = cl_abap_typedescr=>describe_by_data_ref( gdo_dummy ).
go_elemdescr ?= go_typedescr.
IF ( go_elemdescr->kind = cl_abap_elemdescr=>kind_elem AND
       go_elemdescr->help_id = 'BUKRS' ).
    MESSAGE 'Is of TYPE BUKRS' TYPE 'S'.
ELSE.
    MESSAGE 'Is not of TYPE BUKRS' TYPE 'S'.
ENDIF.
END-OF-SELECTION.
Regards
Uwe

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Message was edited by: NikaBrady

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Message was edited by: NikaBrady

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Resolving data-reference at runtime ( cl_abap_typedescr)

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