Roundtrip Engineering with FUJABA 1

1 Introduction Typically, UML is used in the early software development phases. Use-case diagrams serve for requirements analysis. During object-oriented analysis and design, the different use-cases are refined by a number of scenarios using sequence diagrams, collaboration diagrams or activity diagrams. In more elaborated cases, state-charts may be used to specify exact (object) behaviour. In addition to these scenarios one develops class diagrams specifying the static aspects of the desired application like classes, attributes, associations, and method declarations. State-of-the-art CASE tools like Rational Rose [4], TogetherJ [5], and Rhapsody [6], provide editors for various kinds of UML diagrams. However, since most UML behaviour diagrams describe only scenarios, code generation and round-trip engineering support is restricted to class diagrams and (in case of Rhapsody and Rational Rose RT) state-charts. In [1], [7], [8], [9], we propose to use the other UML behaviour diagrams for the specification of method bodies and for code generation. Altogether, our work allows to use UML class and behaviour diagrams as a very high-level visual programming language called Story-Diagrams. This paper focuses on round-trip engineering support for this visual programming language by the FUJABA environment. The concepts for code generation have already been described in [1], [9]. This abstract illustrates the concepts for recognizing class and behaviour diagrams from Java code.