设计模式14——适配器模式

适配器模式可以使接口不相同的几个对象通过适配来统一接口。Target与Adaptee各自拥有自己的方法，但接口不同，可以通过Adapter进行统一。

#ifndef Adapter_H_H
#define Adapter_H_H

#include <iostream>
using namespace std;

class Target
{
public:
    virtual void display() { cout << "This is a common target!" << endl; }
    virtual ~Target() {}
};

class Adaptee
{
public:
    void specialDisplay() { cout << "This is a special target!" << endl; }
};

class Adapter : public Target
{
public:
    Adapter() : adaptee(new Adaptee()) {}
    virtual void display() { adaptee->specialDisplay(); }
    ~Adapter() { delete adaptee; }

private:
    Adaptee *adaptee;
};


void AdapterTest()
{
    Target *target1 = new Target();
    Target *target2 = new Adapter();

    target1->display();
    target2->display();

    delete target1;
    delete target2;
}


#endif

运行结果：

Adaptee与Target接口不同，却可以通过Adapter进行统一。