摘要
Softwaremodularizationisatechniqueusedtodivideasoftwaresystemintoindependentmodules（packages）thatareexpectedtobecohesiveandlooselycoupled.However,assoftwaresystemsevolveovertimetomeetnewrequire-ments,theirmodularizationsbecomecomplexandgraduallyloosetheirquality.Thus,itischallengingtoautomaticallyoptimizetheclasses＇distributioninpackages,alsoknownasremodularization.Toalleviatethisissue,weintroduceanewapproachtooptimizesoftwaremodularizationbymovingclassestomoresuitablepackages.Inadditiontoimprovingdesignqualityandpreservingsemanticcoherence,ourapproachtakesintoconsiderationtherefactoringeffortasanobjectiveinitselfwhileoptimizingsoftwaremodularization.WeadapttheElitistNon-dominatedSortingGeneticAlgorithm（NSGA-Ⅱ）ofDebetal.tofindthebestsequenceofrefactoringsthat1）maximizestructuralquality,2）maximizesemanticcohesivenessofpackages（evaluatedbyasemanticmeasurebasedonWordNet）,and3）minimizetherefactoringeffort.Wereporttheresultsofanevaluationofourapproachusingopen-sourceprojects,andweshowthatourproposalisabletoproduceacoherentandusefulsequenceofrecommendedrefactoringsbothintermsofqualitymetricsandfromthedeveloper＇spointsofview.
出版日期
2018年06月16日（中国期刊网平台首次上网日期，不代表论文的发表时间）
