Runtime type information

[former_member192854]

Hi all,

is there a possibility within runtime type information to see which classes are using a certain interface from the CL_ABAP_INTFDESCR class? Or another OO way?

A selection on dbtab SEOMETAREL just doesn't seem the right way...

Best,

Sander

[former_member201285]

Does "using" mean "implementing" in this context? Here is a sample code checking if a class implements a certain interface:

DATA: gr_descriptor TYPE REF TO cl_abap_objectdescr.        " RTTI

gr_descriptor ?= cl_abap_typedescr=>describe_by_name( 'ZIF_MY_INTERFACE' ).

   IF gr_descriptor->applies_to_class( 'MY_CLASS') = abap_true.

*  class implements the interface

   ENDIF.

Regards,

Ulrich

[former_member192854]

Hi Ulrich,

actually I try to find classes which are using ZIF_MY_INTERFACE without knowing the class names / instances upfront.

Any ideas about that?

Thanks and best,

Sander

[PeterJonker]

I would guess that a where used in SE24 would do the trick. I just tried for interface IF_IXML_NODE and it works. Did you try it ?

[former_member201285]

Take a look at view VSEOIMPLEM. There is the reference between classes and implemented interfaces.

Regards,

Ulrich

[former_member201285]

Or use class CL_OO_IF_RELATIONS

You will find the implementing classes in attribute IMPLEMENTING_CLASSES after creating an instance. Pass the name of the interface to the constructor.

Regards,

Ulrich

[fred_verheul]

I'd think this has not much to do with the (runtime) type system.

Upon debuggng SE80 (when displaying an interface on the left) I found that function module SEO_INTERFACE_IMPLEM_GET_ALL is what SAP uses internally to find implementing classes.

As hinted, this function module uses DB view VSEOIMPLEM.

Cheers, Fred

[former_member192854]

Based on the dbtab I mentioned, but good enough, thanks!

[former_member192854]

Sure, but I actually wanted to have a code based solution.

Making a factory class which should execute some methods from some classes with a specific interface in them.

[former_member192854]

Thanks Fred