【文章內容簡介】 unidirectionally to Sale objects. Absence of navigability arrow indicates no connection from Sale to Register. Register class will have an attribute pointing to a Sale object. 1 1 the currentSale attribute is often excluded, as it is implied by the navigable association from Register to Sale. 上海交通大學計算機科學與工程系 2022/8/17 32 ?關聯上的方 向箭頭一般解釋為從源到目標類的屬性可見性 ?在 OOP中 , 它一般被實現為源類中有一個指向目標類對象的屬性 上海交通大學計算機科學與工程系 2022/8/17 33 ?一些需要定義從 A指向 B的方向性修飾的情形 : ? A發(fā)送消息給 B ? A創(chuàng)建 B的實例 ? A 需要保持與 B的連接 上海交通大學計算機科學與工程系 2022/8/17 34 ? 方向性 Navigability 通過交互圖來識別 i :Store :Register pc: ProductCatalog create() 2: create(pc) 1: create() : loadProdSpecs() :Product Specification : create() *: add(ps) *: create(id, price, description) ps: ProductSpecification 上海交通大學計算機科學與工程系 2022/8/17 35 SalesLineItem quantity : Integer getSubtotal() ProductCatalog ... getSpecification(...) ProductSpecification description : Text price : Money itemID : ItemID ... Store address : Address name : Text addSale(...) Payment amount : Money ... Contains 1.. * Contains 1.. * Register endSale() enterItem(...) makeNewSale() makePayment(...) Sale date : Date isComplete : Boolean time : Time beeComplete() makeLineItem(...) makePayment(...) getTotal() Captures Houses Uses Looksin Paidby Describes 1 1 1 1 1 1 1 1 1 1 1 1 1 * Logspleted 4 * 1 上海交通大學計算機科學與工程系 2022/8/17 36 添加依賴關系 ?依賴關系表明一個元素（包括類，用例，等等）知道另外一個元素 ? 用虛線箭頭表示 ?在類圖中，依賴關系可以表示非屬性可見性，即：參數，全局或者局部可見性 上海交通大學計算機科學與工程系 2022/8/17 37 SalesLineItem quantity : Integer getSubtotal() ProductCatalog ... getSpecification(...) ProductSpecification description : Text price : Money itemID: ItemID ... Store address : Address name : Text addSale(...) Payment amount : Money ... Contains 1.. * Contains 1.. * Register ... endSale() enterItem(...) makeNewSale() makePayment(...) Sale date : Date isComplete : Boolean time : Time beeComplete() makeLineItem(...) makePayment(...) getTotal() Captures Houses Uses Looksin Paidby Describes 1 1 1 1 1 1 1 1 1 1 1 1 1 * A dependency of Register knowing about ProductSpecification. Remended when there is parameter, global or locally declared visibility. Logspleted 4 * 1 上海交通大學計算機科學與工程系 2022/8/17 38 成員細節(jié)的表示 SampleClass classAttribute + publicAttribute privateAttribute attributeWithVisibilityUnspecified attribute1 : type burgers : List of VeggieBurger attribute2 : type = initial value finalConstantAttribute : int = 5 { frozen } /derivedAttribute classMethod() + 玞 onstructor?SampleClass(int) methodWithVisibilityUnspecified() methodReturnsSomething() : Foo abstractMethod() abstractMethod2() { abstract } // alternate + publicMethod() privateMethod() protectedMethod() ~ packageVisibleMethod() finalMethod() { leaf } methodWithoutSideEffects() { query } synchronizedMethod() { guarded } method1WithParms(in parm1:String, inout parm2:int) method2WithParms(parm1:String, parm2:float) method3WithParms(parm1, parm2) method4WithParms(String, int) methodWithParmsAndReturn(parm1: String) : Foo methodWithParmsButUnspecified(...) : Foo methodWithParmsAndReturnBothUnspecified() plain : Integer = 0