Skip to Content
Technical Articles
Author's profile photo Michael Keller

selection criteria as a class

Dear community, in the openSAP course “Writing Testable Code for ABAP” was unit 1 of week 6 about working with legacy code. It was shown how to transform a procedural report into an object-oriented design with a class. The selection criteria, consisting of PARAMETERS and SELECT-OPTIONS, are transferred to the constructor.

Since there can sometimes be many selection criteria, I have thought about a dynamic solution. Below the core idea as a simple graphic (sorry, UML generation of my demo failed 🙁 … that’s the story for another blog):

In my little demo there is a local helper class called LCL_SELECTION_CRITERIA with access to PARAMETES and SELECT-OPTIONS (global variables) of the report ZSEL_CRITERIA_TEST. Therefore it is possible to transfer the selection criteria to an instance of a global class called ZCL_SEL_CRITERIA dynamically. Subsequently, the instance of this global class is passed to the constructor of another class called ZCL_SEL_CRITERIA_TEST where selection takes place and a small output is generated.

One of the nice side effects of presenting the selection criteria as a class is the possibility to automatically generate an identifier with more than 8 letters (for example “PA_BUKRS” is now “COMP_CODE”).

At the moment the whole thing is nothing more than a “Proof of Concept” and lacks of any error handling 🙂 You can download it from GitHub via abapGit.

What do you think about it?


Have fun










Assigned Tags

      You must be Logged on to comment or reply to a post.
      Author's profile photo Jesús Antonio Santos Giraldo
      Jesús Antonio Santos Giraldo

      That it is interesting!


      Author's profile photo Enno Wulff
      Enno Wulff

      Hi Michael,

      that's a good idea!

      I do not understand why you have your local class which does some important and general things. I am not totally sure but I think these methods should be placed in a global class. When instantiating the class you can provide the reports name to read the selection parameters. Or use CL_ABAP_GET_CALL_STACK=>GET_CALL_STACK to automatically get the callers select options. 😉

      To generalize the transportation of PARAMETERS and SELECT-OPTIONS to any class is really a great thing and could help a lot on testing.

      At least the RANGES table must not fit 100% to the used data! You can use CHAR50 as rollname for any SELECT-OPTIONS. I am not sure how it behaves on numeric values (INT etc), but most rollnames should do.


      Author's profile photo Michael Keller
      Michael Keller
      Blog Post Author

      Hi Enno,

      really fast reply 😉 Impressive!

      I thought a local class is needed to get access to the parameters and select-options of the report. If there is a design without the local helper class, that would be great because "keep it small and simple".

      Just another question: Is there a chance to convert the methods GET_PARAMETER and GET_SELECT_OPTION to work with a RETURNING VALUE? I was looking for something like "DATA(lt_sel_opt_tname) = mr_sel_criteria->get_select_option( EXPORTING iv_name = 'TABNAME')" but that was not possible with something like "RETURNING VALUE(rt_sel_opt) TYPE any" 🙁


      Best regards and many thanks your comment





      Author's profile photo Enno Wulff
      Enno Wulff

      serendipity 🙂

      Returning parameters must be be fully specified. 🙁

      Unluckily there are no implicit range-types for rollnames.

      As a workaround you might use some generic rangetab as mentioned above (like COCF_T_RANGE_CHAR80) and then work with "CORRESPONDING".

      I am not sure why you would like to code "DATA(lt_sel_opt_tname) = mr_sel_criteria->get_select_option(...)" with inline data creation?! If you want to get back the select-options, I assume that you have the SELECT-OPTION declaration in your report...?!

      Author's profile photo Kerem Koseoglu
      Kerem Koseoglu

      Looks like a variant of the "Property Container" design pattern. You might want to read about that particular pattern to get some further inspiration.


      Author's profile photo Michael Keller
      Michael Keller
      Blog Post Author

      Thanks for the note. There is a book about design patterns in ABAP Objects that covers the topic … ?