انسيه عليمرداني

The main goal of software reconstruction is to improve the structure and quality of the software without changing its functionality. By applying refactoring in appropriate places, the quality of a software system can be increased. Therefore, by using search-based approaches, the optimal reconstruction sequence can be identified to improve the quality of the software system. In the field of search-based software engineering, various types of reconstruction, software metrics and search-based optimization algorithms are used to automate the software quality improvement process. Search-based optimization algorithms can be used to find the appropriate sequence of reconstructions. In the field of search-based software engineering, there are problems that require more study and research in this field. In other words, multi-objective optimization methods as well as different criteria for measuring software quality should be investigated and eva‎luated. The research carried out in this thesis is to investigate the research field of software engineering based on searching and testing methods for automating the reconstruction and measuring the quality of software using optimization algorithms. In order to test different optimization methods to improve software quality, an automatic reconstruction tool is developed. By using this tool, the software source code is used as system input to apply different types of reconstruction and then improve the quality of the software. Three multi-objective optimization algorithms RNSGA-III, UNSGA-III and AGEMOEA have been used to improve software quality. Nine different criteria are used as quality objectives for automatic reconstruction of the source code, and a method for automating the reconstruction process is presented. This tool has been tested and eva‎luated on five Java open source projects (tabula-java, jopenchart, water-simulator, jvlt, commons-codec) and the statistical analysis of our tests shows that the proposed algorithms improve the quality of the software and can used them in search-based reconstruction.

بازسازي , مهندسي نرم‌افزار مبتني بر جست‌وجو , الگوريتم تكاملي چندهدفه , سنجه‌هاي كيفيت نرم‌افزار

Refactoring , Search based software engineering , Multi-objective evolutionary algorithm , Software quality metrics

Ensiyeh Alimardani

Saeed Parsa