面向对象分析与设计Part 9

CH31精化领域模型关联类聚集和组合关联的类型和UML表示使用包来组织领域模型关联类什么时候使用关联类？一个属性与关联有关关联类生命周期依赖于关联两个概念之间存在多对多的关系salaryEmploymentEmploysCompanyPerson**一个人，可能受雇于多家公司关联类商店授权服务和机器号码的关联addressnamephoneNumberAuthorizationServiceaddressnameStoremerchantIDServiceContract一个关联类它的属性与关联相关它的生命周期依赖于关联Authorizes-payments-via1..**聚集和组合聚集和组合的UML表示组合聚集部分是全部的成员，而且部分完全依赖于全部共享聚集部分是全部的成员，但部分可能还是其他的成员Finger0..7Handcompositeaggregation1UMLElementReferencesUMLPackagesharedaggregation**聚集和组合POS中的聚集表示Sale包含着SaleLineItem，ProductCatalog包含着ProductSpecificationProductSpecification与ProductPrice关联用于表示不同时期的价格。SaledatetimeSalesLineItemquantityProductSpecificationdescriptionitemID1..*Described-by*1ProductCatalog...ProductPriceactiveInterval:TimeIntervalprice:MoneyTimeIntervalstart:timeStampend:timeStamp1..*11Priced-by1..**关联的其他UML表示关联角色概念的角色和关联的角色两种表达方式FlightCityFlies-to*destination角色名字Person*parentCreates2child1StorePersonEmploys-to-handle-salescashierEmploys-to-managemanager**Manages*workermanagerStoreCashierManagerEmploys*Employs*rolesasconceptsManages*rolesinassociations11111关联的其他UML表示导出元素由其他元素决定的元素受限关联有限制条件的关联自反关联自己和自己关联有序元素date/totaltimeSalederivedattributeSalesLineItem1..*{ordered}Sale...1thereissomekindofordering,suchasbyorderaddedProductCatalogProductSpecificationitemIDContainsProductCatalogProductSpecificationContains1..*multiplicityreducedto1(a)(b)qualifier111使用包来组织领域模型ＵＭＬ的包将对象进行分类管理对象的容器可应用于各种模型的描述UML的包图DomainCoreElementsSalesDomainCoreElementsSalesPOS系统领域模型的表示顶级模型DomainCore/MiscPaymentsProductsSalesAuthorizationTransactionsPOS系统领域模型的表示Core/MiscRegisterManagerStoreaddressnameHouses1..*Employs1..*11POS系统领域模型的表示PaymentsCheckAccountsReceivableCreditPaymentCheckPaymentCheckAuthorizationServiceCreditAuthorizationServiceAuthorized-byAuthorized-by***AuthorizationServiceaddressnamephoneNumberCore::StorePaymentamountEstablishes-credit-forLogs*CreditCardexpiryDatenumberDriversLicensenumber1..*Establishes-identity-forPaid-byCashPaymentamountTendered*Sales::CustomerAbused-byIdentifiesAuthorizationTransactions::PaymentAuthorizationReply-CheckPaymentshaveCheckPaymentReplies-CreditPaymentshaveCreditPaymentReplies11111111111Authorizes-payments-ofmerchantIDServiceContract1POS系统领域模型的表示Products1..*Core::StoreStocks*Describes*Sales::SalesLineItemDescribed-by*Records-sale-of0..1ProductSpecificationdescriptionpriceitemIDProductCatalogItem11111POS系统领域模型的表示SalesCashierCustomer1..*SalesLineItem/quantitySaledateisCompletetimeInitiatesCore::RegisterRecords-sales-onCaptured-onCore::StoreLogs-completed*11111111TaxLineItemdescriptionpercentageamount1..*1POS系统领域模型的表示AuthorizationTransactionsCreditPaymentApprovalRequestCheckPaymentApprovalRequestPaymentAuthorizationRequestCreditPaymentApprovalReplyCheckPaymentApprovalReplyCreditPaymentDenialReplyCheckPaymentDenialReplyPayments::AuthorizationServiceSendsReceivesPayments::CreditPaymentPayments::CheckPaymentPaymentAuthorizationTransactiondatetimeCore::StorePaymentAuthorizationReplyReceives*Sends***1111111111111111CH32新增的系统顺序图和契约makeCreditPayment(credNum,expiryDate)reply:=requestApproval(request)postReceivable(receivable)«actor»:CreditAuthorizationService«actor»:AccountsenterItem(itemID,quantity):NextGenPOSSystem:CashierendSale()ProcessSalePaybyCreditScenariodescription,totaltotalwithtaxes*[moreitems]makeNewSale()«actor»:TaxCalculatortaxLineItems:=getTaxes(sale)postSale(sale)契约信用卡支付makeCreditPayment交叉引用：用例：ProcessSale前置条件：一个处理的销售已经存在所有的商品条目已经输入。后置条件：创建了一个CreditPaymentpmtpmt与当前的销售建立了关联创建了一个CreditCardcc;且cc.number=…cc与pmt建立了关联创建了一个CreditPaymentRequestcpqpmt与cpq建立了关联创建了一个ReceievableEntryrere与外部的AccountsReceievable关联已经建立Sale与Store关联已经建立，并是一次完整的销售。