Context-Oriented Software Engineering: A Modularity Vision

There are a number of constructs to implement context-dependent behavior, such as conditional branches using if statements, method dispatching in object-oriented programming (such as the state de-sign pattern), dynamic deployment of aspects in aspect-oriented programming, and layers in context-oriented programming (COP). Uses of those constructs significantly affect the modularity of the obtained implementation. While there are a number of cases where COP improves modularity, it is not clear when we should use COP in general. This paper presents a preliminary study on our software de-velopment methodology, the context-oriented software engineering (COSE), which is a use-case-driven software development method-ology that guides us to a specification of context-dependent require-ments and design. We provide a way to map the requirements and design formed by COSE to the implementation in our COP lan-guage ServalCJ. We applied COSE to two applications in order to assess its feasibility. We also identify key linguistic constructs that make COSE effective by examining existing COP languages. These feasibility studies and examination raise a number of inter-esting open issues. We finally show our future research roadmap to address those issues