网站开发 卓优科技,做网站购买什么软件,公司网站发展规划书,北京专业网页制作公司文章目录 一、定义抽象产品接口二、定义抽象工厂接口三、定义具体产品四、定义具体工厂五、定义工厂客户端六、客户端调用工厂客户端七、抽象工厂模式的结构 一、定义抽象产品接口
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//| participants … 文章目录 一、定义抽象产品接口二、定义抽象工厂接口三、定义具体产品四、定义具体工厂五、定义工厂客户端六、客户端调用工厂客户端七、抽象工厂模式的结构 一、定义抽象产品接口
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//| participants |
//------------------------------------------------------------------
// abstract product declares an interface for a type of products
//------------------------------------------------------------------
//| participants abstract product |
//------------------------------------------------------------------
interface AbstractProductA{};
//------------------------------------------------------------------
//| participants abstract product |
//------------------------------------------------------------------
interface AbstractProductB{void Interact(AbstractProductA*);};
二、定义抽象工厂接口
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//| participants |
//------------------------------------------------------------------
interface AbstractFactory
// declares an interface for operations that create abstract products
{AbstractProductA* CreateProductA(void);AbstractProductB* CreateProductB(void);
};
三、定义具体产品
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//| participants |
//------------------------------------------------------------------
// concrete product
// defines product object to be created by concrete factory
// implements abstract product interface
//------------------------------------------------------------------
//| participants concrete product |
//------------------------------------------------------------------
class ProductA1:public AbstractProductA
{public:ProductA1(void);
};
void ProductA1::ProductA1(void) {Print(product a1 constructed);}
//------------------------------------------------------------------
//| participants concrete product |
//------------------------------------------------------------------
class ProductA2:public AbstractProductA
{public:ProductA2(void);
};
void ProductA2::ProductA2(void) {Print(product a2 constructed);}
//------------------------------------------------------------------
//| participants concrete product |
//------------------------------------------------------------------
class ProductB1:public AbstractProductB
{public:ProductB1(void);void Interact(AbstractProductA*);
};
void ProductB1::ProductB1(void) {Print(product b1 constructed);}
void ProductB1::Interact(AbstractProductA*src)
{Print(product b1: ,this, is interacting with product a: ,src);
}
//------------------------------------------------------------------
//| participants concrete product |
//------------------------------------------------------------------
class ProductB2:public AbstractProductB
{public:ProductB2(void);void Interact(AbstractProductA*);
};
void ProductB2::ProductB2(void) {Print(product b2 constructed);}
void ProductB2::Interact(AbstractProductA*src)
{Print(product b2: ,this, is interacting with product a: ,src);
}
//
//
四、定义具体工厂
//------------------------------------------------------------------
//| participants |
//------------------------------------------------------------------
// concrete factory implements operations create concrete products
//------------------------------------------------------------------
//| participants concrete factory |
//------------------------------------------------------------------
class Factory1:public AbstractFactory
{public:Factory1(void);AbstractProductA* CreateProductA(void);AbstractProductB* CreateProductB(void);
};
//------------------------------------------------------------------
//| participants concrete factory factory 1 |
//------------------------------------------------------------------
void Factory1::Factory1(void)
{Print(factory 1: ,this, constructed);
}
//------------------------------------------------------------------
//| participants concrete factory factory 1 |
//------------------------------------------------------------------
AbstractProductA* Factory1::CreateProductA(void)
{printf(factory 1 is creating and returning product a1);return new ProductA1;
}
//------------------------------------------------------------------
//| participants concrete factory factory 1 |
//------------------------------------------------------------------
AbstractProductB* Factory1::CreateProductB(void)
{printf(factory 1 is creating and returning product b1);return new ProductB1;
}
//------------------------------------------------------------------
//| participants concrete factory |
//------------------------------------------------------------------
class Factory2:public AbstractFactory
{public:Factory2(void);AbstractProductA* CreateProductA(void);AbstractProductB* CreateProductB(void);
};
//------------------------------------------------------------------
//| participants concrete factory factory 2 |
//------------------------------------------------------------------
void Factory2::Factory2(void)
{Print(factory 2: ,this, constructed);
}
//------------------------------------------------------------------
//| participants concrete factory factory 2 |
//------------------------------------------------------------------
AbstractProductA* Factory2::CreateProductA(void)
{printf(factory 2 is creating and returning product a2);return new ProductA2;
}
//------------------------------------------------------------------
//| participants concrete factory factory 2 |
//------------------------------------------------------------------
AbstractProductB* Factory2::CreateProductB(void)
{printf(factory 2 is creating and returning product b2);return new ProductB2;
}五、定义工厂客户端
//------------------------------------------------------------------
//| participants |
//------------------------------------------------------------------
class FactoryClient
// uses interfaces declared by abstract factory, abstract product
{public:void Run(void);void Switch(AbstractFactory*);FactoryClient(AbstractFactory*);~FactoryClient(void);protected:AbstractProductA* apa;AbstractProductB* apb;AbstractFactory* factory;void Delete(void);
};
//------------------------------------------------------------------
//| participants factory client |
//------------------------------------------------------------------
void FactoryClient::FactoryClient(AbstractFactory* af)
{Print(factory client created and received abstract factory ,af);Print(factory client is requesting to accept/switch the factories);Switch(af);
}
//------------------------------------------------------------------
//| participants factory client |
//------------------------------------------------------------------
void FactoryClient::~FactoryClient(void)
{Delete();
}
//------------------------------------------------------------------
//| participants factory client |
//------------------------------------------------------------------
void FactoryClient::Run(void)
{Print(factory client is running abstract product b);apb.Interact(apa);
}
//------------------------------------------------------------------
//| participants factory client |
//------------------------------------------------------------------
void FactoryClient::Delete(void)
{delete apa;delete apb;delete factory;
}
//------------------------------------------------------------------
//| participants factory client |
//------------------------------------------------------------------
void FactoryClient::Switch(AbstractFactory *af)
{string sFactory;StringConcatenate(sFactory,sFactory,factory);int iFactory(int)StringToInteger(sFactory);if(iFactory0){Print(factory client is switching old factory ,factory, to new factory ,af);}else{Print(factory client is accepting new factory ,af);}Delete();factoryaf;Print(factory client saved the new factory);Print(factory client is requesting its new factory to create product a);apafactory.CreateProductA();Print(factory client is requesting its new factory to create product b);apbfactory.CreateProductB();
}
六、客户端调用工厂客户端
//------------------------------------------------------------------
//| interface for patterns |
//------------------------------------------------------------------
interface ClientExample //pattern client
{string Output(void); //returns headervoid Run(void); //execute the pattern client
};//------------------------------------------------------------------
//| participants |
//------------------------------------------------------------------
class Client:public ClientExample{
public:string Output(void);void Run(void);};
string Client::Output(void) {return __FUNCTION__;}
//------------------------------------------------------------------
//| collaborations |
//------------------------------------------------------------------
void Client::Run(void)
// concrete factory
// a single instance normally created at run-time
// creates products with particular implementation
// client uses other factory for different product objects
// abstract factory
// defers creation product objects concrete factory subclass{Print(client is requesting to create factory 1);Print(client is requesting to create the factory client);Print(client is requesting the factory client to manage factory 1);FactoryClient client(new Factory1);Print(client is requesting the factory client to operate);client.Run();Print(client is requesting to create new factory 2 and asking factory client to switch factories);client.Switch(new Factory2);Print(client is requesting the factory client to run again);client.Run();}
}
七、抽象工厂模式的结构
//------------------------------------------------------------------
//| structure |
//------------------------------------------------------------------
//
// | AbstractFactory|-----------------------------------------|Client|
// |----------------| |
// |CreateProductA()| |
// |CreateProductA()| |AbstractProductA|-------
// ^ ^ |
// | | |
// --------------------- ---------- |
// | | | | |
//|ConcreteFactory1|- |ConcreteFactory2|- -|ProductA2| |ProductA1|- |
//|----------------| | |----------------| | | |
//|CreateProductA()| |CreateProductA()| |
//|CreateProductB()| | |CreateProductB()| | | |
// |AbstractProductB|------
// | | ^ |
// |
// | | ---------- |
// | |
// | -|ProductB2| |ProductB1|-
// |
// - - - - - - - - - - - - - - - - - - - - - - - - -
