application of object-oriented database system design technology（应用面向对象的数据库系统设计技术）

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1、Applicationofobject-orienteddatabasesystemdesigntechnologyAbstract:Thebasicideaof​​object-orientedtechnologyanddevelopmentprocess,describestheimplementationofobject-orientedtechnology.Adetaileddiscussionwithconcreteexamplesinthedatabasesystemarchitecturedesignanddetaileddesignofo

2、bject-orientedtechnology,theuseofsurfacetotheobjectdatabasesystemanalysisanddesignmethods,theuseoftheUMLtooltoestablishaspecificobjectmodel,givesamoregeneral-purposedatabasesystemdevelopmentmodelsystemsdesignedtousethemodereuse,andeasytomaintain,inordertoeffectivelyimprovethequalityofthedeve

3、lopmentofdatabasesystems.Keywords:object-orienteddatabasesystemdesignedobjectmodelAnobject-orientedbasicconceptsof1.1object(Object)method(Method)andmessage(Message)Objectiveworldisconstitutedbytheentitiesintheobjectiveworldandtheirmutual10relationshipbetweentheobjectiveworldofabstractentitie

4、sforobjectsintheproblemspaceweneedtosolvedifferentproblems,wefacetheobjectisdifferent,sotheobjectisnotfixed.Abookcanbeanobject,alibrarycanalsobeanobject.Dynamicpointofview,theobjectanditsoperationisthebehavioroftheobject,anobjectisusuallydefinedas:theobjectisoperatingonasetofinformationandit

5、sabovedescription.Privatedatastructureandprocessing,theseprocessesalsoknownasoperations(Operation)ormethod(Method),includingcontrolandprocessprivatedata,saidthestateoftheobject,thestateonlybyaprivateoperationtochange,whenevertheneedtochangetheobjectthestate,youcanonlysendmessagestotheobjectb

6、yotherobjects.Messageisusedtorequesttheobjecttoperformanoperationortoanswercertainrequestsforinformation,themessageunifieddataflowandcontrolflow,programexecutionisagainsttheobjectspassthemessagethatthemessageintheformofnewsmode.10differentmessagesofthesamemessagemode,theinterpretationandproc

7、essingbythesameobjectarethesame,butoperatingresultsduetothedifferentstateoftheobject.amessageofaschemadefinesobject,allmessagesmodeandmessagemodeprocessingcapabilities,definetheexternalcharacteristicsoftheobject.1.2(Class),instance(Instance),inheri