Get structure definition of generic defined table ( type any, cl_abap,RTTI, RTTC)

Hello

I am realizing a Class/Method in SAP BW, where I outsource a start routine in a method. Nevertheless I am in SAP BW I have a pure ABAP issue

See please following definition:

The method gets (changing) an internal table defined here as any table. I use follwing code in order to adress columns in the internal table:

...................

*  1) consignment: get fill-up order of issue order (precedent document) in order to discover
*     later corresponding schedule agreement
  UNASSIGN <ls_source_fields>.
  LOOP AT source_package ASSIGNING <ls_source_fields>.
    ASSIGN COMPONENT comp_coord_type   OF STRUCTURE <ls_source_fields> TO <ls_coord_type>.
    ASSIGN COMPONENT comp_dvgblnum     OF STRUCTURE <ls_source_fields> TO <ls_dvgblnum>.

..................

I can see in 'debugging mode'  the columns in internal table 'source_package'. Therefore I have the idea, it should be possible to adress all columns at once in that generic table in a more comfortable way as through 'assign component' each field individually.

My first idea was around RTTI oder RTTC ( runtime type identification, runtime type creation ) to use class cl_abap_....

Thus is it possible? Have anyone a good idea?

Thanks a lot

Christian