Abstract
As software evolves, data types have to be extended, possibly with new data variants or new operations. Object-oriented design is well-known to support data extensions well. In fact, most popular books showcase data extensions to illustrate how objects adequately support software evolution. Conversely, operation extensions are typically better supported by a functional design. A large body of programming language research has been devoted to the challenge of properly supporting both kinds of extensions.
While this challenge is well-known from a language design standpoint, it has not been studied empirically. We perform such a study on a large sample of Smalltalk projects (over half a billion lines of code) and their evolution over more than 100,000 committed changes.
Our study of extensions during software evolution finds that extensions are indeed prevalent evolution tasks, and that both kinds of extensions are equally common in object-oriented software. We also discuss findings about the evolution of the kinds of extensions over time, and about the viability of the Visitor pattern as an object-oriented solution to operation extensions. This study suggests that object-oriented design alone is not sufficient, and that practical support for both kinds of program decomposition approaches are in fact needed, either by the programming language or by the development environment.
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References
Arcuri, A., Briand, L.C.: A practical guide for using statistical tests to assess randomized algorithms in software engineering. In: Proceedings of ICSE 2011, pp. 1–10 (2011)
Aversano, L., Canfora, G., Cerulo, L., Del Grosso, C., Di Penta, M.: An empirical study on the evolution of design patterns. In: Proceedings of ESEC/SIGSOFT FSE 2007, pp. 385–394 (2007)
Baxter, G., Frean, M.R., Noble, J., Rickerby, M., Smith, H., Visser, M., Melton, H., Tempero, E.D.: Understanding the shape of Java software. In: Proceedings of OOPSLA 2006, pp. 397–412 (2006)
Booch, G.: Object-Oriented Analysis and Design with Applications, 2nd edn. Addison-Wesley (1994)
Cook, W.R.: Object-Oriented Programming Versus Abstract Data Types. In: de Bakker, J.W., Rozenberg, G., de Roever, W.-P. (eds.) REX 1990. LNCS, vol. 489, pp. 151–178. Springer, Heidelberg (1991)
Erlikh, L.: Leveraging legacy system dollars for e-business. IT Professional 2(3), 17–23 (2000)
Gamma, E., Helm, R., Johnson, R., Vlissides, J.: Design Patterns: Elements of Reusable Object-Oriented Software. Professional Computing Series. Addison-Wesley (October 1994)
Gîrba, T., Lanza, M., Ducasse, S.: Characterizing the evolution of class hierarchies. In: Proceedings of CSMR 2005, pp. 2–11 (2005)
Gorschek, T., Tempero, E.D., Angelis, L.: A large-scale empirical study of practitioners’ use of object-oriented concepts. In: Proceedings of ICSE 2010, pp. 115–124 (2010)
Grechanik, M., McMillan, C., DeFerrari, L., Comi, M., Crespi, S., Poshyvanyk, D., Fu, C., Xie, Q., Ghezzi, C.: An empirical investigation into a large-scale java open source code repository. In: Proceedings of ESEM 2010, pp. 11:1–11:10 (2010)
Kapser, C.J., Godfrey, M.W.: Supporting the analysis of clones in software systems: A case study. Journal of Software Maintenance and Evolution: Research and Practice 18 (2006)
Krishnamurthi, S., Felleisen, M., Friedman, D.P.: Synthesizing Object-Oriented and Function Design to Promote Reuse. In: Jul, E. (ed.) ECOOP 1998. LNCS, vol. 1445, pp. 91–113. Springer, Heidelberg (1998)
Lehman, M., Belady, L.: Program Evolution: Processes of Software Change. London Academic Press, London (1985)
Mayrand, J., Leblanc, C., Merlo, E.M.: Experiment on the automatic detection of function clones in a software system using metrics. In: Proceedings of Software Maintenance, pp. 244–253 (November 1996)
Oliveira, B.C.d.S.: Modular Visitor Components: A Practical Solution to the Expression Families Problem. In: Drossopoulou, S. (ed.) ECOOP 2009. LNCS, vol. 5653, pp. 269–293. Springer, Heidelberg (2009)
Pearl, J.: Why there is no statistical test for confounding, why many think there is, and why they are almost right. Technical report, Department of Statistics, University of California, Los Angeles (1998)
Posnett, D., Filkov, V., Devanbu, P.: Ecological inference in empirical software engineering. In: Proceedings of ASE 2011, pp. 362–371 (2011)
Reynolds, J.C.: User-defined types and procedural data structures as complementary approaches to data abstraction. In: New Advances in Algorithmic Languages, pp. 157–168 (1975)
Robbes, R., Lungu, M.: A study of ripple effects in software ecosystems. In: Proceedings of ICSE 2011, NIER Track, Honolulu, Hawaii, USA, pp. 904–907. ACM Press (May 2011)
Van Rysselberghe, F., Demeyer, S.: Studying versioning information to understand inheritance hierarchy changes. In: Proceedings of MSR 2007, p. 16 (2007)
Schwarz, N., Lungu, M., Robbes, R.: On how often code is cloned across repositories. In: Proceedings of ICSE 2012, NIER Track (2012)
Shalloway, A., Trott, J.R.: Design Patterns Explained: A New Perspective on Object-Oriented Design, 2nd edn. Addison-Wesley (2004)
Tempero, E., Noble, J., Melton, H.: How Do Java Programs Use Inheritance? An Empirical Study of Inheritance in Java Software. In: Ryan, M. (ed.) ECOOP 2008. LNCS, vol. 5142, pp. 667–691. Springer, Heidelberg (2008)
Torgersen, M.: The Expression Problem Revisited: Four New Solutions Using Generics. In: Vetta, A. (ed.) ECOOP 2004. LNCS, vol. 3086, pp. 123–146. Springer, Heidelberg (2004)
Vargha, A., Delaney, H.D.: A critique and improvement of the cl common language effect size statistics of McGraw and Wong. Journal of Educational and Behavioral Statistics 25(2), 101–132 (2000)
Wadler, P.: The expression problem. Mail to the java-genericity mailing list (1998)
Zenger, M., Odersky, M.: Independently extensible solutions to the expression problem. In: Proceedings of FOOL 2005, Long Beach, USA (January 2005)
Zimmermann, T., Weißgerber, P., Diehl, S., Zeller, A.: Mining version histories to guide software changes. IEEE Transactions on Software Engineering 31(6), 429–445 (2005)
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Robbes, R., Röthlisberger, D., Tanter, É. (2012). Extensions during Software Evolution: Do Objects Meet Their Promise?. In: Noble, J. (eds) ECOOP 2012 – Object-Oriented Programming. ECOOP 2012. Lecture Notes in Computer Science, vol 7313. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-31057-7_3
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DOI: https://doi.org/10.1007/978-3-642-31057-7_3
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