Issue with Instantiation of a Class in Workflow

Question

I created a subclass of CL_HRASR00_WF_PROCESS_OBJECT to include some of my custom methods to be used in the workflow. Since the subclass methods cant be referred using the super class name(as we do in BO) in the standard task , i used a custom method to create the instance of the subclass using the following code and then using the subclass instance i tried to call my subclass method, but the issue what i am facing is the subclass instance is not getting created using the following code(may be i am missing something) instead the superclass instance is returned by the method containing the below code an in the next step(in workflow) when it tries to call the subclass method I am getting an error that : "Method not found":'CL.CL_HRASR00_WF_PROCESS_OBJECT.GET_INIT_EMAIL'. Please advice what is that I am missing.
  TRY.
      CREATE OBJECT processinst
        EXPORTING
          guid = guid.
    CATCH cx_bo_error .
  ENDTRY.
where processinst is of type ZCL_HRASR00_WF_PROCESS_OBJECT.

Answer 1

Well, what about if you just forget the whole sub-classing? Just build your own class that is not a subclass of anything). It does need only the minimum: the constuctor and the LPOR-methods and of course your own custom logic/methods. This way you can still use the functionalitites of the super-class but can also use your own custom logic offered by your own class. You don't even need to implement the LPOR-methods, if you use only static methods (for example some kind of "get email address" method could be static).
Of course this will not work, if you have a specific reason for using subclass, but I doubt you have. Trying to emulate the BO super/subclass delegation functionality is not good enough reason. It is totally ok to build your own class that has nothing to do with the actual standard class. It all depends on the requirements and what makes the most sense.
Regards,
Karri