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1、南华大学计算机科学与技术学院实验报告（2013-2014学年度第二学期）课程名称：JAVAEE平台软件开发课程内容：JAVAEE平台简介（翻译）姓名学号专业班级地点教师原文：2.1.1TheBeanContextasaparticipantinnestedstructure（嵌套结构）OneoftherolesoftheBeanContextistointroducethenotion（概念）ofahierarchicalnesting（嵌套层次）orstructureofBeanContextandJavaBeaninstances（实例）.Inordertomodelth
2、isstructuretheBeanContextmustexposeAPIthatdefinestherelationshipsinthestructureorhierarchy.TheBeanContextexposesitssuperstructure（上层建筑）throughimplementation（实施）ofthejava.beans.beancontext.BeanContextChildinterface(asdescribedlater).Thisinterfaceallowsthediscoveryandmanipulation（操作）ofaBeanCo
3、ntext’snestingBeanContext,andthusintroducesafacilitytocreateahierarchyofBeanContexts.TheBeanContextexposesitssubstructurethroughanumberofinterfacemethodsmodeledbythejava.util.Collectioninterfacesemantics（语义）BeanContextsarerequiredtoimplementallthemandatory（强制的）CollectionAPI’s,withthefollowi
4、ngparticularsemanticsforadd()andremove():.Theadd()methodmaybeinvokedinordertonestanewObject,BeanContextChild,orBeanContextwithinthetargetBeanContext.Aconformantadd()implementationisrequiredtoadhereto（坚持）thefollowingsemantics:•SynchronizeontheBeanContext.globalHierarchyLock.•Eachchildobjects
5、hallappearonlyonceinthesetofchildrenforagivenBeanContext.IftheinstanceisalreadyamemberoftheBeanContextthenthemethodshallreturnFalse.•Eachvalid（有效的）childshallbeaddedtothesetofchildrenofagivensourceBeanContext,andthusshallappearinthesetofchildren,obtainedthrougheitherthetoArray(),oriterator()
6、methods,untilsuchtimeasthatchildisdeletedfromthenestingBeanContextviaaninvocationofremove(),removeAll(),retainAll(),orclear()•Asthechildisaddedtothesetofnestedchildren,andwherethatchildimplementthejava.beans.beancontext.BeanContextChildinterface(orBeanContextProxy,seelaterfordetails),theBea
7、nContextshallinvokethesetBeanContext()methoduponthatchild,withareferencetoitself.Uponinvocation,achildmay,ifitisforsomereasonunableorunpreparedtofunctioninthatBeanContext,throwaPropertyVetoExceptiontonotifythenestingBeanContext.Ifthechildthrowssuchanexce
