Checking generic data types

[gustavo_prado]

Hi all,

In java, when we have a parameter/variable of a generic type, we can use the "type of" to check what is the correct type to make some attribution.

In abap, i have a function with generic table parameter, and in the function i want to check about what structure is the referencing parameter.

Somebody know how to check it?

Best regards,

Gustavo

[Former Member]

Hi Gustavo,

you can find out using Field symbols.

1. Declare variable field-symbols : <fs_struct> type any.

2. Get reference of the Table parameter and assign to field symbol declared above.

   ex: lt_table is table parameter then

ASSIGN lt_table->* TO <fs_struct>.

Now fs_struct will be pointing to structure of the Lt_table. Check structure in debug mode for more detail.

Regards,

Ravikiran.K

[Former Member]

This message was moderated.

[gustavo_prado]

Well,

The real situation is:

FM Table parameter:

IT_GEN TYPE STANDARD TABLE.

This IT_GEN can be structure ST_INVOICE or ST_SALESORD.

When the FM is called, i have to check about what structure is the parameter.

Thanks,

Gustavo

[former_member302911]

Hi Gustavo,

check this code:

DATA: lcl_typedescr     TYPE REF TO cl_abap_typedescr,
          lva_absolute_name TYPE abap_abstypename.


   lcl_typedescr            = cl_abap_typedescr=>describe_by_data( IT_GEN ).
   lva_absolute_name   = lcl_typedescr->absolute_name. 

Regards,

Angelo.

[RaymondGiuseppi]

Look for RTTS class. (e.g. CL_ABAP_TABLEDESCR, CL_ABAP_STRUCTDESCR, etc.)

But with only two different structures available, coding (and maintenance) would be much easier with either two FMs (in same FG so sharing many code) or to optional parameters.

Regards,

Raymond

[gustavo_prado]

Thanks to all, with the cl_abap_tabledescr i did it.

Regards,

Gustavo