An Approach to Measure Java Code Quality in Reuse Environment

1. An Approach to Measure Java Code Quality in Reuse Environment Master: Aline Timóteo Professor: Silvio Meira UFPE – Federal University of Pernambuco alt@cin.ufpe.br http://www.rise.com.br

2. Summary • Motivation • Background • Quality in a Reuse Environment • Metrics • An Approach to Measure Java Code Quality • Main Contributions http://www.rise.com.br

3. Motivation http://www.rise.com.br

4. Motivation • Reuse environment [Frakes, 1994] • Process • Metrics • Assets • Tools http://www.rise.com.br

5. Motivation • Component Repository promote reuse success [Griss, 1994] • Search Engine[Garcia, 2006] • Analyze a set of Search Engines • Requirements • Artifact filtering http://www.rise.com.br

6. Problem • Artifacts quality • In search time? • How to eliminate low-quality artifacts? • In other words… How to eliminate low-quality artifacts in search time? http://www.rise.com.br

7. Background http://www.rise.com.br

8. Quality in a Reuse Environment [Etzkorn, 2001] • ISO 9126 http://www.rise.com.br

9. Metrics • “Software metrics is a method to quantify attributes in software processes, products and projects” [Daskalantonakis, 1992] • Metrics Timeline • Age 1: before 1991, where the main focus was on metrics based on the code complexity • Age 2: after 1992, where the main focus was on metrics based on the concepts of Object Oriented (OO) systems http://www.rise.com.br

10. Age 2: Object Oriented Age 1: Complexity http://www.rise.com.br

11. Most Referenced Metrics • LOC • Cyclomatic Complexity [McCabe, 1976] • Chidamber and Kemerer Metrics [Chidamber, 1994] • Lorenz and Kidd Metrics [Lorenz, 1994] • MOOD Metrics [Brito, 1994] http://www.rise.com.br

12. Problems related to Metrics [Ince, 1988 and Briand, 2002] • Metrics Validation • Measurement goal • Experimental hypothesis • Environment or context • Theoretical Validation • Empirical validation • Metrics Automation • Different set of metrics implemented • Bad documentation • Quality attributes x Metrics http://www.rise.com.br

13. An Approach to Measure Java Code Quality http://www.rise.com.br

14. An Approach to Measure Java Code Quality • Quality Attributes x Metrics • Metrics Selection and Specification • Quality Attributes measurement http://www.rise.com.br

15. Quality Attributes x Metrics http://www.rise.com.br

16. Quality Attributes x Metrics http://www.rise.com.br

17. Quality Attributes x Metrics http://www.rise.com.br

18. Metrics Selection and Specification • - Theoretical Validation • - Empirical Validation • - Tools • -LOC • -Cyclomatic Complexity • - CK Metrics http://www.rise.com.br

19. Metrics Selection and Specification http://www.rise.com.br

20. Quality Attributes Measurement (QAM) • QAM = (the number of metrics that have a allowable value) • QAM >= Number of metrics /2 • Example: • 2,5 <= QAM <= 5 http://www.rise.com.br

21. Contributions • Introduce quality analysis in a search engine • Store assets and their quality attributes • In the search time the asset is recovered according quality attribute values • Quality attributes x Code metrics • ISO 9126 http://www.rise.com.br

22. Current Stage • Sate-of-the-art in Software Metrics • Approach definition • Prototypal Implementation (partial) • Integration with B.A.R.T. (next step) • Experiment (next step) http://www.rise.com.br

23. Referências • [Frakes, 1994] W. B. Frakes and S. Isoda, "Success Factors of Systematic Software Reuse," IEEE Software, vol. 11, pp. 14--19, 1994. • [Griss, 1994] M. L. Griss, "Software Reuse Experience at Hewlett-Packard," presented at 16th International Conference on Software Engineering (ICSE), Sorrento, Italy, 1994. • [Garcia, 2006] V. C. Garcia, D. Lucrédio, F. A. Durão, E. C. R. Santos, E. S. Almeida, R. P. M. Fortes, and S. R. L. Meira, "From Specification to Experimentation: A Software Component Search Engine Architecture," presented at The 9th International Symposium on Component-Based Software Engineering (CBSE 2006), Mälardalen University, Västerås, Sweden, 2006. • [Etzkorn, 2001] Letha H. Etzkorn, William E. Hughes Jr., Carl G. Davis: Automated reusability quality analysis of OO legacy software. Information & Software Technology 43(5): 295-308 (2001) • [Daskalantonakis, 1992] M. K. Daskalantonakis, “A Pratical View of Software Measurement and Implementation Experiences Within Motorola”, IEEE Transactions on Software Engineering, vol 18, 1992, pp. 998–1010. • [McCabe, 1976] T. J. McCabe, “A Complexity Measure”. IEEE Transactions of Software Engineering, vol SE-2, 1976, pp. 308-320. • [Chidamber, 1994] S. R. Chidamber, C. F. Kemerer, “A Metrics Suite for Object Oriented Design”, IEEE Transactions on Software Engineering, vol 20, Piscataway - USA, 1994, pp. 476-493. • [Lorenz, 1994] M. Lorenz, J. Kidd, “Object-Oriented Software Metrics: A Practical Guide”, Englewood Cliffs, New Jersey - USA, 1994. • [Brito, 1994] A. F. Brito, R. Carapuça, "Object-Oriented Software Engineering: Measuring and controlling the development process", 4th Interntional Conference on Software Quality, USA, 1994. • [Ince, 1988] D. C. Ince, M. J. Sheppard, "System design metrics: a review and perspective", Second IEE/BCS Conference, Liverpool - UK, 1988, pp. 23-27. • [Briand, 2002] L. C. Briand, S. Morasca, V. R. Basili, “An Operational Process for Goal-Driven Definition of Measures”, Software Engineering - IEEE Transactions, vol 28, 2002, pp. 1106-1125. • [Morasca, 1989] S. Morasca, L. C. Briand, V. R. Basili, E. J. Weyuker, M. V. Zelkowitz, B. Kitchenham, S. Lawrence Pfleeger, N. Fenton, "Towards a framework for software measurementvalidation", Software Engineering, IEEE Transactions, vol 23, 1995, pp. 187-189. http://www.rise.com.br

24. Aline Timóteo UFPE – Federal University of Pernambuco alt.timoteo@gmail.com http://www.rise.com.br