A Persistence Class is a special ABAP Objects class generated by the Persistence Service that maps database tables to ABAP objects, allowing you to read, modify, and save table data in an object-oriented way instead of writing SQL manually; it ...
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Abstract Class Defined with CLASS ... DEFINITION ABSTRACT. Can have: Attributes (data) Concrete methods (implemented) Abstract methods (declared but not implemented — must be redefined in subclass) Cannot be instantiated directly — only subclasses can be created. Supports inheritance (a subclass inherits implementation + attributes). Can implement interfaces ...
A class can implement multiple interfaces at once, which allows you to combine functionality from many sources. Example: ” First interface INTERFACE if_flyable. METHODS: fly. ENDINTERFACE. ” Second interface INTERFACE if_swimmable. METHODS: swim. ENDINTERFACE. ” A class implementing multiple interfaces CLASS cl_duck DEFINITION. PUBLIC ...
A friend class can access the protected and private components of another class. This is useful when you want to allow controlled access to internal details of a class without making them public. CLASS main_class DEFINITION. PUBLIC SECTION. METHODS: display. PRIVATE ...