逆向工程过程在真实情况中的应用的分析毕业设计外文文献翻译Word文档格式.docx
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逆向工程过程在真实情况中的应用的分析毕业设计外文文献翻译Word文档格式.docx
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(**)BasicaS.p.A.,Potenza,Italy
Abstract
Areverseengineeringprocessmodelwasappliedandonthebasisofthedatacollected,somemodificationsweremadeaimingtoimproveitsefficacy.Theexperiencegaverisetovariousconsiderationsofinterest,firstamongthembeingtheclearinteractionbetweenthequalityoftheproductandthequalityoftheprocess.Amethodofsynergeticapplicationofstaticanddynamicanalysistoimproveunderstandingoftheprogramwasconsolidated.Theexperienceenabledmodificationstobeintroducedconnectingthereverseengineeringprocessmorecloselywiththeunderstandingoftheprogramsandinformationderivingfromtheapplicationdomain.
Finally,theproblemoftheefficacyofthetoolsusedtoobtainthereverseengineeringproductswasmadeevidentduringtheexperimentationonthefield.
1:
Introduction
Wepresentanexperienceinwhichprocessqualityandproductqualityinteractandmutuallyimproveoneanother.Theprocessisreverseengineeringwhiletheproductisthedocumentationofprogramsnecessarytoexploittheprogrambetter.Thesalientpointtobegainedfromtheexperienceare,ingeneral,themodelasitappearsafterimprovementsstemmingfromtrialonthefieldand,inparticular,themethodforintegratingstaticanddynamicanalysestoimprovetheprocess.
Thepaperdescribestheapplicationofaprocessmodeltoarealsituation.Thescenarioisasetofprogramswiththefollowingcharacteristics:
language:
COBOL
operatingsystem:
BS2000
totalno.ofprograms:
653
no.ofon-lineprograms:
348
no.ofbatchprograms:
305
no.offiles:
70
no.ofdata:
9000
no.ofInstructions:
900000
2:
Thereverseengineeringprocess
Ourreverseengineeringprocesshadtwomainobjectives:
(1)toincreasetheeaseofmaintenanceofthesoftwaresystem,and
(2)toimproveitsusabilitybythefinalusersandtheeaseofknowledgetransferamongdifferentusers[5].
Thefirstinvolvedreconstructionoftheprojectdesigndocumentationandrestorationofthemostdegradedartswhilethesecondrequiredreconstructionoftheuserdocumentationandthedataconceptualmodel.Thiselpsuserstounderstandtheirowninformationsystemetterfromthepointofviewofthedataprocessed[4],[6].
Figure1showstheprocessmodel,whichisbrieflydescribedunderneath.Furtherdetailsmaybeobtainedfrom[10].
1.InventorySoftwareSystem.Thefollowingcrossreferencesareextractedfromthe
oldsoftwaresystem:
calldependenceX-ref,copybookX-ref,andfileaccessX-ref.
2.ReconstructLogicalLevelofData.Fromthedatadescription,thehierarchicalstructureconstitutingthelogicaldatamodelisreconstructed.Thealiasesarerecognizableentitiesintheapplicationdomain.Figure2showsarecorddeclaration,asinputtothephase,andtherelativehierarchicaldiagram,asoutputfromthephase.Thearrowsrepresentthehierarchicalrelationshipsbetweenthesubstructuresintherecord;
elementarydataarenotshown.Thedataareclassifiedasapplicationdomaindata,controldata,andstructuraldata.Applicationdomaindataaretheattributesofrecognizableentitiesintheapplicationdomain.Forexample,thefieldnamedMT02-02representingthe"
amount"
isalsoanattributeofMORTGAGEandisthereforerecognizableintheapplicationdomain.Controldatahavenocorrespondencewiththeapplicationdomainbutareusedtorecordtheoccurrenceofaneventduringtheexecutionofaprogram,sothatotherprogramscanadaptaccordingly;
flagsvalidatedbyoneprogramandusedbyothers,asynchronously,todeterminetheirbehavioraccordingtotheprevioushistoryofthesoftwaresystem,aretypicalexamplesofcontroldata.Forexample,thefieldMT02-33ispresettoindicatetheexistenceofanagreementfortakingoutthemortgage,whichmustformthebasisofthevariationininterestratetobeappliedwhencalculatingtheinstalment;
itisatypicalexampleofcontroldata.Structuraldataaredatanecessaryformanagingtheorganizationofdatabasesorfiles.ThefieldMT01-05isatypicalexampleofstructuraldata,becauseitidentifiestherecordtypeinsidetheMORTGAGEfile.
3.AbstractData.Allthedataintheapplicationdomainwhichbelongtothelogicalmodelandarenotdeadareassociatedwiththecorrespondingmeaningfulconceptfortheapplicationdomain[1].
4.AnalysisofExistingInformation.Thisactivityinvolvesidentifyingtheexpectedfunctionsintheprogrambeingreversedusingtwotypesofinformation.
Thefirstisstaticknowledge,i.e.theinternalandexternaldocumentationoftherulesgoverningtheapplicationdomainofthefunc
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- 关 键 词:
- 逆向 工程 过程 真实情况 中的 应用 分析 毕业设计 外文 文献 翻译