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Advances and Challenges in software refactoring: A Tertiary Systematic Literature Review

Advances and Challenges in Software Refactoring: A Tertiary ...

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作者： Alotaibi, Mazen Rochester Institute of Technology

学位级别：M.S.

software refactoring is one of the most critical aspects of software maintenance. It improves the quality of the software, reduces potential occurrence of bugs and keeps the code easier to maintain, extend and read. The process of refactoring supports and enables the developers to improve the design of software without changing the behavior. However, the automation of this process is complex for developers and software engineers since it is subjective, time and resource consuming. In this context, many literature reviews have analyzed the existing effort made by researchers to facilitate refactoring, as a core software engineering practice. This paper, aims in integrating all the existing research outcomes by performing a tertiary study on all the secondary studies, done in the area of refactoring. Based on our analysis we notice that there are many area of software refactoring that are under studied. As an outcome of this review, several classifications of existing studies were provided to showcase all the studies targeting the automation of refactoring along with explaining what metrics and objectives were used as means to drive refactoring and how it was assessed. This thesis also aims in unveiling areas of future directions for the research community in order to consolidate their efforts in improving the refactoring as a practice.

关键词： software refactoring--Bibliography software refactoring--research

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How We Refactor and How We Mine it? A Large Scale Study on refactoring Activities in Open Source Systems

How We Refactor and How We Mine it? A Large Scale Study on R...

引用

作者： Alomar, Eman Abdullah Rochester Institute of Technology

学位级别：M.S.

refactoring, as coined by William Obdyke in 1992, is the art of optimizing the syntactic design of a software system without altering its external behavior. refactoring was also cataloged by Martin Fowler as a response to the existence of design defects that negatively impact the software's design. Since then, the research in refactoring has been driven by improving systems structures. However, recent studies have been showing that developers may incorporate refactoring strategies in other development related activities that go beyond improving the design. In this context, we aim in better understanding the developer's perception of refactoring by mining and automatically classifying refactoring activities in 1,706 open source Java projects. We perform a differentiated replication of the pioneering work by Tsantalis et al. We revisit five research questions presented in this previous empirical study and compare our results to their original work. The original study investigates various types of refactorings applied to different source types (i.e., production vs. test), the degree to which experienced developers contribute to refactoring efforts, the chronological collocation of refactoring with the release and testing periods, and the developer's intention behind specific types of refactorings. We reexamine the same questions but on a larger number of systems. To do this, our approach relies on mining refactoring instances executed throughout several releases of each project we studied. We also mined several properties related to these projects; namely their commits, contributors, issues, test files, etc. Our findings confirm some of the results of the previous study and we highlight some differences for discussion. We found that 1) feature addition and bug fixes are strong motivators for developers to refactor their code base, rather than the traditional design improvement motivation; 2) a variety of refactoring types are applied when refactoring both production an

关键词： software refactoring--research Open source software--research Computer software--Development Debugging in computer science

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