Implementing Fowler´s Analysis Validator Pattern i.doc
上传人:sy****28 上传时间:2024-09-12 格式:DOC 页数:14 大小:104KB 金币:15 举报 版权申诉
预览加载中,请您耐心等待几秒...

Implementing Fowler´s Analysis Validator Pattern i.doc

ImplementingFowler´sAnalysisValidatorPatterninJava.doc

预览

免费试读已结束,剩余 4 页请下载文档后查看

15 金币

下载此文档

如果您无法下载资料,请参考说明:

1、部分资料下载需要金币,请确保您的账户上有足够的金币

2、已购买过的文档,再次下载不重复扣费

3、资料包下载后请先用软件解压,在使用对应软件打开

ImplementingFowler'sAnalysisValidatorPatterninJavaByDr.SaraStoecklinDr.ClementAllenIntroductionBuildinglargesystemsrequiresthedifficultandtime-consumingactivitiesofelicitationandrepresentationofsoftwarerequirements.Duringtheseanalysisactivitiesparticularanalysisabstractionsemerge.Theseabstractions,calledanalysispatterns,representreusablepatternsforsubsequentanalysiseffortsinvariousdomains.Asansimpleexample,softwaredevelopersuseananalysisabstractioncalledPersontorepresentapersonfromdifferentapplicationdomainssuchasastudentperson,employerperson,customerperson,etc.Fowler[Fow97]hasdefinedahigherabstractiontorepresenteitherapersonoranorganization,labeledthePartypattern.Themostpopularcurrentpatterns,designpatterns,dealwiththosepatternsusefulinobject-orienteddesignandobjectorientedprogramming[Gam95],[Cop95],[Gra98a],[Gra98b].Designpatternsrepresentreusablesoftwarestructuresneededforimplementation.Incontrast,Fowler’sAnalysisPatternsrepresentreusableabstractionsneededintheelicitationandrepresentationofthesoftwarerequirements,thusanalysispatterns.Analysispatternsrepresentconceptualdomainstructuresdenotingthemodelofabusinesssystemdomainratherthanthedesignofcomputerprograms.Whileanalysispatternsdonotdealdirectlywiththedetailsofimplementation,theydoinfluencehowcodeisdesigned.2.0WhyUseAnalysisPatternsWehaveusedpatternsinstructuredprogrammingandtheyprovedbeneficial.Whenwritinganewprogram,mostprogrammerscopiedexamplesofsimilarprograms(programpatterns)andmodifiedthosesimilarprogramstomeettheneedsofthenewprogramratherthanwritingthenewprogramfromscratchandrisksimplecompileerrorsaswellaslogicerrors.Structuredpatternprogramsprovedbeneficialbecausetheysavedinthedevelopmenttimeneededfornewprogramsandthemaintenancetimeforreviewingexistingprogramswhereprogrammersunderstoodthecommonlyusedpatternprograms.Object-orientedanalysis,designandprogramming,whenintroduced,proclaimedthenotableadvantageofreuse.Theseproclamationsgavehopetotheideaofeasyandfastsoftwaredevelopmentusingreusabl