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Interactive Exploration of Reverse-Engineered UML Sequence Diagrams

Explore reverse-engineered UML sequence diagrams through interactive, fast-paced visualization, filtering, and focusing on messages and interaction fragments. Utilize techniques from code understanding for comprehensive exploration. Conclusions and future work emphasize the importance of abstraction, filtering, merging, and layout computation.

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Interactive Exploration of Reverse-Engineered UML Sequence Diagrams

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  1. Interactive Exploration of Reverse-Engineered UML Sequence Diagrams Richard Sharp Atanas (Nasko) Rountev Ohio State University

  2. Example of a UML Sequence Diagram start:X p:A m1() m2() m3() create() n:A m4() opt Nasko Rountev VISSOFT'05

  3. UML Sequence Diagrams • Popular UML artifacts for modeling of object interactions • Design-time sequence diagrams • Reverse-engineered sequence diagrams • Based on existing code • Iterative development; design recovery for software maintenance; software testing • Implemented in some commercial UML tools • Together ControlCenter (Borland) • EclipseUML (Omondo) Nasko Rountev VISSOFT'05

  4. Reverse-Engineering Analyses • Dynamic analysis: tracks a set of representative run-time executions • Several research tools • Static analysis: examines only the code • Commercial tools (deficiencies) • Some research work (not comprehensive) • RED tool for Java: PRESTO group at OSU • URL: presto.cse.ohio-state.edu/red • Call chain analysis; control-flow analysis; object naming analysis; visualization and navigation; test coverage measurements Nasko Rountev VISSOFT'05

  5. Example of a Reverse-Engineered Diagram Nasko Rountev VISSOFT'05

  6. Zooming and Translation • Useful, but have serious limitations Nasko Rountev VISSOFT'05

  7. Filtering • Filter out certain diagram elements • Choose starting and ending message • Choose call stack depth start msg: 172 end msg: 177 depth: 2 (out of 5) Nasko Rountev VISSOFT'05

  8. Filtering of Interaction Fragments Filtering of Interaction Fragments • Condense alt/opt/loop/break fragments • Filter out everything outside of a chosen fragment Nasko Rountev VISSOFT'05

  9. Focusing on a Single Message Nasko Rountev VISSOFT'05

  10. Conclusions and Future Work • Interactive, fast-paced exploration • Abstraction is critical • Filtering: by time, by call graph depth, by objects, by interaction fragments • Merging: e.g. combine together a set of related objects into a single object • Computation and re-computation of layout • Techniques from code understanding • Slicing w.r.t. messages, objects, etc. • Refactoring (e.g., “extract sub-diagram”) Nasko Rountev VISSOFT'05

  11. Questions? Nasko Rountev VISSOFT'05

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