Design Patterns & Frameworks: On the Issue of Language Support

Object-oriented frameworks and design patterns are useful abstractions that are relatively new to the object-oriented paradigm. The implementation of the abstractions, however, suffers from a number or problems due to the fact that insufficient language support is provided by the traditional object-oriented paradigm. In this paper, we analyse these problems, study the different approaches for providing extended language support that can be identified and specify the requirements that have to be fulfilled by such approaches. In addition, we present examples on how language support for design patterns and object-oriented frameworks can be provided using the layered object model, our extended object-oriented research language.