设计模式之中介者模式

设计模式之中介者模式(Mediator)

中间者模者模式原理：中介者维持所有要交互对象的指针或者对象，所有对象维持一个中介者的指针或者对象。

#include <iostream>

#include <string>

using namespace std;

class Mediator;

class Person

{

public:

	virtual GetMessage(string message)

	{

	}

	virtual void SendMessage(string message)

	{

	}

	virtual void SetMediator(Mediator *pmdiator)

	{

	}

protected:

	Mediator *m_pmediator;

};

class Mediator

{

public:

	void Send(string message,Person *person)

	{

		if (person == m_renter)

		{

			m_landlord->GetMessage(message);

		}

		else

		{

			m_renter->GetMessage(message);

		}

	}

	void SetRenter(Person *prenter)

	{

		m_renter = prenter;

	}

	void SetLandlord(Person *plandlord)

	{

		m_landlord = plandlord;

	}

private:

	Person *m_renter;

	Person *m_landlord;

};

class Renter:public Person

{

public:

	virtual GetMessage(string message)

	{

		cout << "租客收到租房信息："<<message<<endl;

	}

	virtual void SendMessage(string message)

	{

		m_pmediator->Send(message,this);

	}

	virtual void SetMediator(Mediator *pmediator)

	{

		m_pmediator = pmediator;

	}

};

class Landlord:public Person

{

public:

	virtual GetMessage(string message)

	{

		cout << "房东收到租房信息："<<message<<endl;

	}

	virtual void SendMessage(string message)

	{

		m_pmediator->Send(message,this);

	}

	virtual void SetMediator(Mediator *pmediator)

	{

		m_pmediator = pmediator;

	}

};

int main()

{

	Mediator *pmediator = new Mediator();

	Person *prenter = new Renter();

	Person *plandlord = new Landlord();

	pmediator->SetLandlord(plandlord);

	pmediator->SetRenter(prenter);

	prenter->SetMediator(pmediator);

	plandlord->SetMediator(pmediator);

	prenter->SendMessage("我要租一个有网的房子");

	plandlord->SendMessage("我现在有一个两室一厅的房子要出租");

	return 0;

}