设计模式Before-after之适配器模式

最新推荐文章于 2024-01-29 21:23:45 发布

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最新推荐文章于 2024-01-29 21:23:45 发布

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分类专栏：设计模式

本文链接：https://blog.youkuaiyun.com/bossfrog/article/details/21110825

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本文探讨了设计模式中的适配器模式，讲解了在before.cxx文件中如何运用该模式来解决接口不匹配的问题，阐述了适配器模式在软件设计中的重要性和实用性。

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before.cxx

#include <iostream>

class Dog {
public:
	void runAway(void) {
		std::cout << "HELP!!! Dog-god bless me!" << std::endl;
	}
};

class DogHunter {
public:
	void hunt(Dog &dog) {
		dog.runAway();
	}
};

class Bird {
public:
	void flyAway(void) {
		std::cout << "HELP!!! Bird-god bless me!" << std::endl;
	}
};

class BirdHunter {
public:
	void hunt(Bird &bird) {
		bird.flyAway();
	}
};

int main(void) {
	Dog dog;
	DogHunter dogHunter;
	dogHunter.hunt(dog);
	Bird bird;
	BirdHunter birdHunter;
	birdHunter.hunt(bird);
	return 0;
}

after.cxx

#include <iostream>

class _Dog {
public:
	virtual void runAway(void) = 0;
};

class Dog: public _Dog {
public:
	void runAway(void) {
		std::cout << "HELP!!! Dog-god bless me!" << std::endl;
	}
};

class DogHunter {
public:
	void hunt(_Dog &dog) {
		dog.runAway();
	}
};

class Bird {
public:
	void flyAway(void) {
		std::cout << "HELP!!! Bird-god bless me!" << std::endl;
	}
};

class BirdAdapter: public _Dog {
public:
	BirdAdapter(Bird &bird): bird(bird) {}
	void runAway(void) {
		bird.flyAway();
	}
private:
	Bird &bird;
};

int main(void) {
	Dog dog;
	DogHunter dogHunter;
	dogHunter.hunt(dog);
	Bird bird;
	BirdAdapter birdAdapter(bird);
	dogHunter.hunt(birdAdapter);
	return 0;
}