设计模式读书笔记：Bridge（桥接）

来源：互联网发布：万方数据库高级检索编辑：程序博客网时间：2024/06/06 01:17

意图：

将抽象部分与它的实现部分分离，使它们都可以独立地变化。

结构图：来自《23种设计模式 - 郗晓勇》

实现：https://github.com/panshiqu/patterns/tree/master/Bridge

Implementor

namespace NS_BRIDGE {class Implementor {public:Implementor() {}virtual ~Implementor() {}virtual void operationImp(void) = 0;};} /* namespace NS_BRIDGE */

ConcreteImplementorA

#include "Implementor.h"#include <iostream>namespace NS_BRIDGE {class ConcreteImplementorA : public Implementor{public:ConcreteImplementorA() {}virtual ~ConcreteImplementorA() {}virtual void operationImp(void){std::cout << "ConcreteImplementorA" << std::endl;}};} /* namespace NS_BRIDGE */

ConcreteImplementorB

#include "Implementor.h"#include <iostream>namespace NS_BRIDGE {class ConcreteImplementorB : public Implementor{public:ConcreteImplementorB() {}virtual ~ConcreteImplementorB() {}virtual void operationImp(void){std::cout << "ConcreteImplementorB" << std::endl;}};} /* namespace NS_BRIDGE */

Abstraction

#include "Implementor.h"namespace NS_BRIDGE {class Abstraction {public:Abstraction(Implementor *imp) : _imp(imp) {}virtual ~Abstraction() {}virtual void operation(void){_imp->operationImp();}private:Implementor *_imp;};} /* namespace NS_BRIDGE */

main

#include "Bridge/Abstraction.h"#include "Bridge/ConcreteImplementorA.h"#include "Bridge/ConcreteImplementorB.h"using namespace NS_BRIDGE;int main(void){// 可以使用Abstract Factory创建实现// 如此以来这段代码将不依赖或需要知道任何实现ConcreteImplementorA ia;Abstraction abs(&ia);abs.operation();}

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