【初学设计模式】Bridge (桥接)

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类图：

 

 

 

 

代码实现：

 

类声明：

/********************************************************************File: bridge.hAuthor:blackboy [e-mail]:桥接模式Created:2011-03-16Modified:2011-03-16 10:20*********************************************************************/#ifndef __BRIDGE_H__#define __BRIDGE_H__namespace blackboycpp{ class Implementor; ////////////////////////////////////////////////////////////////////////// // Abstractions class Abstraction { public: Abstraction(Implementor*); virtual void Operation(); private: Implementor* _imp; }; class RefinedAbstraction : public Abstraction { public: RefinedAbstraction(Implementor*); void OperationMore(); }; ////////////////////////////////////////////////////////////////////////// // Implementors class Implementor { public: virtual void OperationImp() = 0; }; class ConcreteImplementorA : public Implementor { public: virtual void OperationImp(); }; class ConcreteImplementorB : public Implementor { public: virtual void OperationImp(); };}#endif

 

 

 

类实现：

#include <iostream>#include "bridge.h"namespace blackboycpp{ Abstraction::Abstraction(Implementor* p) { std::cout << "Abstraction::Abstraction(Implementor*)/n"; _imp = p; } void Abstraction::Operation() { std::cout << "Abstraction::Operation()/n"; _imp->OperationImp(); } RefinedAbstraction::RefinedAbstraction(Implementor* p) : Abstraction(p) { std::cout << "RefinedAbstraction::RefinedAbstraction(Implementor*)/n"; } void RefinedAbstraction::OperationMore() { std::cout << "RefinedAbstraction::OperationMore()/n"; Operation(); } void ConcreteImplementorA::OperationImp() { std::cout << "ConcreteImplementorA::OperationImp()/n"; } void ConcreteImplementorB::OperationImp() { std::cout << "ConcreteImplementorB::OperationImp()/n"; }}

 

 

 

main()：

#include <cstdlib>#include "bridge.h"using namespace blackboycpp;int main(int argc, char** argv){ ConcreteImplementorA* impA = new ConcreteImplementorA; RefinedAbstraction* abstraction = new RefinedAbstraction(impA); abstraction->OperationMore(); delete abstraction; delete impA; system("pause"); return 0;}