topic Runtime type information in Application Development and Automation Discussions

Runtime type information

former_member192854 — Tue, 02 Dec 2014 08:58:24 GMT

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

Re: Runtime type information

former_member201285 — Tue, 02 Dec 2014 11:43:06 GMT

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

Re: Runtime type information

former_member192854 — Tue, 02 Dec 2014 12:52:19 GMT

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

Re: Runtime type information

PeterJonker — Tue, 02 Dec 2014 13:17:40 GMT

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 ?

Re: Runtime type information

former_member201285 — Tue, 02 Dec 2014 13:23:37 GMT

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

Regards,

Ulrich

Re: Runtime type information

former_member201285 — Tue, 02 Dec 2014 13:40:45 GMT

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

Re: Runtime type information

fred_verheul — Tue, 02 Dec 2014 14:27:17 GMT

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

Re: Runtime type information

former_member192854 — Tue, 02 Dec 2014 14:29:04 GMT

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

Re: Runtime type information

former_member192854 — Tue, 02 Dec 2014 14:30:03 GMT

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.

Re: Runtime type information

former_member192854 — Tue, 02 Dec 2014 14:32:00 GMT

Thanks Fred