Dynamic interface declaration

Question

Hello,
Is it possible to have a dynamic interface declaration like you can have a dynamic object declaration?
For an object:
data: lo_object type ref to object.
create object lo_object type (lv_object_name).
Is this in some way possible to do with an interface? I need to do this for an interface at runtime.
Gr,
Jaron

Answer 1

You can create data of a dynamically given reference  type (which may be an interface) and move the object reference to it.
Something like so:
DATA:
      my_obj TYPE REF TO object,
      lr_data TYPE REF TO data.
  FIELD-SYMBOLS: <fs> TYPE ANY.
  CREATE OBJECT my_obj TYPE my_object_type.
TRY.
  CREATE DATA lr_data TYPE REF TO (some_interface_type_name).
  ASSIGN lr_data->* TO <fs>.
   <fs> ?= my_obj.
  CATCH cx_sy_move_cast_error.
  CATCH cx_sy_create_data_error.
ENDTRY.
Basically, the assignment tests if my_obj is an instance of the type named some_interface_type_name.
Hope this helps,
Sebastian