Towards a catalog of aspect-oriented refactorings

ABSTRACT

In this paper, we present a collection of aspect-oriented refactorings covering both the extraction of aspects from object-oriented legacy code and the subsequent tidying up of the resulting aspects. In some cases, this tidying up entails the replacement of the original implementation with a different, centralized design, made possible by modularization. The collection of refactorings includes the extraction of common code in various aspects into abstract superaspects. We review the traditional object-oriented code smells in the light of aspect-orientation and propose some new smells for the detection of crosscutting concerns. In addition, we propose a new code smell that is specific to aspects.

REFERENCES

• 1: Kent Beck, Extreme programming explained: embrace change, Addison-Wesley Longman Publishing Co., Inc., Boston, MA, 1999
• 2: Gilad Bracha , William Cook, Mixin-based inheritance, Proceedings of the European conference on object-oriented programming on Object-oriented programming systems, languages, and applications, p.303-311, September 1990, Ottawa, Canada
• 3: Leonardo Cole , Paulo Borba, Deriving refactorings for AspectJ, Proceedings of the 4th international conference on Aspect-oriented software development, p.123-134, March 14-18, 2005, Chicago, Illinois [doi>10.1145/1052898.1052909]
• 4: Cole, L., Borba, P., Using Programming Laws to Modularize Concurrency in a Replicated Database Application, 1st Brasilian Workshop on Aspect-Oriented Software Development - WBSOA'04 - SBES'04, Brazil, October 2004.
• 5: Adrian Colyer , Andrew Clement, Large-scale AOSD for middleware, Proceedings of the 3rd international conference on Aspect-oriented software development, p.56-65, March 22-24, 2004, Lancaster, UK [doi>10.1145/976270.976279]
• 6: James W. Cooper, Java design patterns: a tutorial, Addison-Wesley Longman Publishing Co., Inc., Boston, MA, 2000
• 7: Deursen, A., Marin, M., Moonen, L., Aspect Mining and Refactoring, workshop on REFactoring: Achievements, Challenges, Effects (REFACE03), Waterloo, Canada, November 2003.
• 8: Edsger W. Dijkstra, Letters to the editor: go to statement considered harmful, Communications of the ACM, v.11 n.3, p.147-148, March 1968 [doi>10.1145/362929.362947]
• 9: Eckel, B., Thinking in Patterns, revision 0.9. book in progress, May 20, 2003. Available at http://64.78.49.204/IPatterns-0.9.zip
• 10: Filman, R. E., Friedman, D. P., Aspect-Oriented Programming is Quantification and Obliviousness, workshop on Advanced Separation of Concerns, OOPSLA 2000, Minneapolis, October 2000.
• 11: Fowler, M. (with contributions by K. Beck, W. Opdyke and D. Roberts), Refactoring - Improving the Design of Existing Code, Addison Wesley 2000.
• 12: Erich Gamma , Richard Helm , Ralph Johnson , John Vlissides, Design patterns: elements of reusable object-oriented software, Addison-Wesley Longman Publishing Co., Inc., Boston, MA, 1995
• 13: Jan Hannemann , Gregor Kiczales, Design pattern implementation in Java and aspectJ, Proceedings of the 17th ACM SIGPLAN conference on Object-oriented programming, systems, languages, and applications, November 04-08, 2002, Seattle, Washington, USA
• 14: Hanenberg, S., Oberschulte, C., Unland, R., Refactoring of Aspect-Oriented Software, Net.ObjectDays 2003, Erfurt, Germany, September 2003.
• 15: Iwamoto, M., Zhao, J., Refactoring Aspect-Oriented Programs, 4th AOSD Modeling With UML Workshop, UML'2003, San Francisco, USA, October 2003.
• 16: Joshua Kerievsky, Refactoring to Patterns, Pearson Higher Education, 2004
• 17: Kiczales, G., Lamping, J., Mendhekar, A., Maeda, C., Lopes, C., Loingtier, J., Irwin, J., Aspect-Oriented Programming, ECOOP'97, Finland, June 1997.
• 18: Ramnivas Laddad, Aspect Oriented Refactoring, Addison-Wesley Professional, 2006
• 19: Ramnivas Laddad, AspectJ in Action: Practical Aspect-Oriented Programming, Manning Publications Co., Greenwich, CT, 2003
• 20: Orleans, D., Separating behavioral concerns with predicate dispatch, or, if statement considered harmful, workshop on Advanced Separation of Concerns in Object-Oriented Systems at OOPSLA '01, Tampa Bay, USA, October 2001.
• 21: Monteiro, M. P., Catalogue of Refactorings for AspectJ, Technical Report UM-DI-GECSD-200402, Universidade do Minho, December 2004. Available at www.di.uminho.pt/~jmf/PUBLI/papers/2004-TR-02.pdf
• 22: Monteiro, M. P., Refactoring a Java Code Base to AspectJ - An Ilustrative Example, Technical Report UM-DI-GECSD-200403, Universidade do Minho, December 2004. Available at www.di.uminho.pt/~jmf/PUBLI/papers/2004-TR-03.pdf
• 23: Monteiro, M. P., Fernandes, J. M., Object-to-Aspect Refactorings for Feature Extraction, industry paper presented at AOSD'2004, UK, Lancaster, March 2004. Available at http://aosd.net/2004/archive/Monteiro.pdf
• 24: William F. Opdyke, Refactoring object-oriented frameworks, University of Illinois at Urbana-Champaign, Champaign, IL, 1992
• 25: Daniel Sabbah, Aspects: from promise to reality, Proceedings of the 3rd international conference on Aspect-oriented software development, p.1-2, March 22-24, 2004, Lancaster, UK [doi>10.1145/976270.976271]
• 26: Störzer, M., Koppen, C., PCDiff: Attacking the Fragile Pointcut Problem, Interactive Workshop on Aspects in Software (EIWAS) 2004, Berlin, Germany, September 2004.
• 27: Peri Tarr , Harold Ossher , William Harrison , Stanley M. Sutton, Jr., N degrees of separation: multi-dimensional separation of concerns, Proceedings of the 21st international conference on Software engineering, p.107-119, May 16-22, 1999, Los Angeles, California, United States [doi>10.1145/302405.302457]
• 28: Paolo Tonella , Mariano Ceccato, Migrating Interface Implementation to Aspects, Proceedings of the 20th IEEE International Conference on Software Maintenance, p.220-229, September 11-14, 2004
• 29: Tourwé, T., Brichau, J., Gybels, K., On the Existence of the AOSD-Evolution Paradox, AOSD 2003 Workshop on Software-engineering Properties of Languages for Aspect Technologies, Boston, USA, 2003.
• 30: William C. Wake, Refactoring Workbook, Addison-Wesley Longman Publishing Co., Inc., Boston, MA, 2003
• 31: Wloka, J., Refactoring in the Presence of Aspects, ECOOP2003 PhD workshop, July 2003.

INDEX TERMS

Keywords:
aspect-oriented programming, code smells, object-oriented programming, programming style, refactoring