Abstract
To solve the identification and comprehension problem of crosscutting concerns in existing legacy software system, a framework of aspect-oriented software reverse engineering is proposed. An approach on re-modularizing traversal features of legacy system is presented based on various unified modeling language (UML) diagrams. While modeling crosscutting concerns in UML use case diagrams, the non-functional requirements that affect several use case modules can be enveloped into aspect modules with a stereotype mechanism. The recurring message transmission patterns can be re-modularized as aspects in UML sequence diagrams with UML collaborations. Standard UML activity diagram notations are extended and modified by node fusion and addition, which support the graphical composition operation between crosscutting behaviors and primary business rules of concurrent systems. Case study indicates that traversal features of software system can be extracted and re-modularized from various perspectives in aspect-oriented reverse engineering, which improves comprehensibility and maintainability of legacy systems.
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