资源描述：
《javaee平台简介(翻译)》由会员上传分享，免费在线阅读，更多相关内容在应用文档-天天文库。
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）.Inordertomodelthisstructu
2、retheBeanContextmustexposeAPIthatdefinestherelationshipsinthestructureorhierarchy.TheBeanContextexposesitssuperstructure（上层建筑）throughimplementation（实施）ofthejava.beans.beancontext.BeanContextChildinterface(asdescribedlater).Thisinterfaceallowsthediscoveryandmanipulation（操作）ofaBeanContext’snestingBean
3、Context,andthusintroducesafacilitytocreateahierarchyofBeanContexts.TheBeanContextexposesitssubstructurethroughanumberofinterfacemethodsmodeledbythejava.util.Collectioninterfacesemantics（语义）BeanContextsarerequiredtoimplementallthemandatory（强制的）CollectionAPI’s,withthefollowingparticularsemanticsforadd
4、()andremove():.Theadd()methodmaybeinvokedinordertonestanewObject,BeanContextChild,orBeanContextwithinthetargetBeanContext.Aconformantadd()implementationisrequiredtoadhereto（坚持）thefollowingsemantics:•SynchronizeontheBeanContext.globalHierarchyLock.•Eachchildobjectshallappearonlyonceinthesetofchildren
5、foragivenBeanContext.IftheinstanceisalreadyamemberoftheBeanContextthenthemethodshallreturnFalse.•Eachvalid（有效的）childshallbeaddedtothesetofchildrenofagivensourceBeanContext,andthusshallappearinthesetofchildren,obtainedthrougheitherthetoArray(),oriterator()methods,untilsuchtimeasthatchildisdeletedfrom
6、thenestingBeanContextviaaninvocationofremove(),removeAll(),retainAll(),orclear()•Asthechildisaddedtothesetofnestedchildren,andwherethatchildimplementthejava.beans.beancontext.BeanContextChildinterface(orBeanContextProxy,seelaterfordetails),theBeanContextshallinvokethesetBeanContext()methoduponthatch
7、ild,withareferencetoitself.Uponinvocation,achildmay,ifitisforsomereasonunableorunpreparedtofunctioninthatBeanContext,throwaPropertyVetoExceptiontonotifythenestingBeanContext.Ifthechildthrowssuchanexce
