#include <iostream>
using namespace std;
class Duck {
public:
virtual ~Duck() = default;
virtual void Quack() = 0;
virtual void Fly() = 0;
};
class Turkey {
public:
virtual ~Turkey() = default;
virtual void Gobble() = 0;
virtual void Fly() = 0;
};
class ConcreteTurkey : public Turkey {
public:
void Gobble() override { cout << "Turkey Gooble" << endl; }
void Fly() override { cout << "Turkey Fly." << endl; }
};
class ConcreteDuck : public Duck {
public:
void Quack() override { cout << "Quack." << endl; }
void Fly() override { cout << "ConcreteDuck Fly." << endl; }
};
//对象适配器，也即组合方式实现适配
class DuckAdapter : public Duck {
public:
DuckAdapter(Turkey &turkey) : _turkey(turkey) { }
void Quack() override { _turkey.Gobble(); }
void Fly() override { _turkey.Fly(); }
private:
Turkey &_turkey;
};
//类适配器, 多继承方式, 这里直接继承具体的类，而非接口或抽象类
class DuckAdapterClass : public ConcreteDuck, public ConcreteTurkey {
public:
void Quack() override { ConcreteTurkey::Gobble(); }
void Fly() override { ConcreteTurkey::Fly(); }
};
void UseDuck(Duck &duck) {
duck.Quack();
duck.Fly();
}
int main() {
ConcreteTurkey cturkey;
DuckAdapter duck_adapter(cturkey);
UseDuck(duck_adapter);
DuckAdapterClass duck_adapter_class;
UseDuck(duck_adapter_class);
return 0;
}
适配器模式-C++
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