Adapter设计模式

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#include <iostream>#define CCLASSclass Target{public:virtual void Request(){};};class Adaptee{public:void SpecificRequest(){std::cout<<"SpecificRequest"<<std::endl;};}; #ifdef CCLASS  // calss pattern    class Adapter: public Target, private Adaptee{public:void Request(){SpecificRequest();}};#else class Adapter:public Target //Object pattern {public:Adapter(Adaptee* ade);~Adapter();virtual void Request();private:Adaptee* _ade;};Adapter::Adapter(Adaptee* ade){this->_ade=ade;}void Adapter::Request(){_ade->SpecificRequest();}#endifint main(int argc, char* argv[]){#ifdef CCLASSTarget* p=new Adapter();p->Request();#elseAdaptee* ade=new Adaptee;Target* adt=new Adapter(ade);adt->Request();#endifreturn 0;}

分为类模式和对象模式

类模式主要是Adapter同时继承Target和Adaptee

然后用函数把Adapter的需求转换为Adaptee

对象模式主要是Adapter继承Target, 然后包含Adaptee

通过Adapter的私有Adaptee× 指向包含进来的Adaptee×，

通过函数， Adapter的需求为私有Adaptee*的需求，私有Adaptee*的需求指向包含进来的私有Adaptee*的需求

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