SAP RAP HANDLER METHODS ABEXA

Get Example source ABAP code based on a different SAP table
  SAP Help

Example for RAP Handler Methods
This example demonstrates various RAP handler methods with an unmanaged and draft-enabled RAP BO.
Note that the simplified example does not represent a real business scenario. The focus is on the technical side by giving an idea on self-implementing the handler methods of an ABAP behavior pool (ABP) and dealing with the method parameters. The code should not be reused in a production scenario.