Comparison of Object-Oriented Approaches for Roles in Programming Languages

This paper presents, explores and compares object-oriented approaches for roles in statically typed programming languages. We choose five solutions which support information hiding. On the one hand, we investigate the established object-oriented possibilities multiple and interface inheritance and the role object pattern, on the other hand, we examine the language extensions Object Teams and the syntactical extension of classes with roles. We discuss all approaches in turn, using a versatile example. The investigation shows that standard approaches interface inheritance and role object pattern are more appropriate for enterprise projects. New approaches are not developed far enough to be used widespread. But they are all promising proceedings, particularly the approach of roles as components