topic Re: ABAP Overwrite Enhancement in Application Development and Automation Discussions

ABAP Overwrite Enhancement

robinwennemuth — Mon, 15 Jan 2018 21:31:18 GMT

Hey Guys,

just a simple Question:

If I have a SAP Standard class and implement an Overwrite Exit. Is it possible to call the Original implementation of the SAP standard?

My customer requests every Enhancement to be deactivated on Demand by editing some Custom Table parameters, and I would like to tie the Activity status to my Enhancement run.

I have already implemented this kind of conditional Enhancement in an Web Dynpro Component Overwrite Enhancement by calling me->method( ) in order to refer to the Original implementation.

Thanks!

Robin

Re: ABAP Overwrite Enhancement

uladzislau_pralat — Tue, 16 Jan 2018 01:50:40 GMT

Hi Robin,

I would rather implement before exit. In before exit I can check user condition and execute EXIT command to skip standard method implementation or if needed continue with standard method execution.

Regards, Uladzislau

Re: ABAP Overwrite Enhancement

robinwennemuth — Tue, 16 Jan 2018 09:35:12 GMT

Hey Uladzislau,

thanks for your suggestion.

Would this work for an explicit Pre-Exit Enhancement for a method? I´d suppose a RETURN or EXIT statement within a Pre-Exit would just leave this procedure, but would not abort the processing of the standard method.

Or would this suggestion rather work for implicit enhancements?

Thanks,

Robin

Re: ABAP Overwrite Enhancement

uladzislau_pralat — Tue, 16 Jan 2018 10:25:17 GMT

Hi Robin,

I used described approach with EXIT statement in implicit pre-method to conditionally bypass standard method implementation.

Regards, Uladzislau

Re: ABAP Overwrite Enhancement

Sandra_Rossi — Tue, 16 Jan 2018 13:26:16 GMT

Please move your reply under Uladzislau's answer, by using "Convert into Comment"

Re: ABAP Overwrite Enhancement

Sandra_Rossi — Tue, 16 Jan 2018 13:32:24 GMT

Within a pre-method, EXIT does not prevent the standard method from executing (because a pre-method is coded in its own method, so EXIT (or preferrably RETURN) will only exit the pre-method). Within a pre-method, the only way to prevent the enhanced method from executing is the triggering of a brutal stop (like the triggering a class-based exception); of course the consequence is huge and often it's not advisable to do it.

Re: ABAP Overwrite Enhancement

Sandra_Rossi — Tue, 16 Jan 2018 13:38:27 GMT

You may implement the implicit enhancement point at the beginning of the method (whirlpool icon + context menu to firstly display the implicit points and secondly create implementation). As the code is inserted directly in the body of the method, the RETURN statement (EXIT being recommended only for leaving loops) will leave the enhanced method.