设计模式读书笔记：memento（备忘录）

namespace NS_MEMENTO {

class Memento {
public:
	virtual ~Memento() {}

private:
	friend class Originator;
	Memento() : _state(false) {}
	bool getState(void)	{ return _state; }
	void setState(bool state)	{ _state = state; }

private:
	bool _state;
};

} /* namespace NS_MEMENTO */

#include "Memento.h"

namespace NS_MEMENTO {

class Originator {
public:
	Originator() : _state(false) {}
	virtual ~Originator() {}
	Memento *createMemento(void)
	{
		Memento *m = new Memento();
		m->setState(_state);
		return m;
	}
	void setMemento(Memento *m)
	{
		setState(m->getState());
	}

	bool getState(void)	{ return _state; }
	void setState(bool state)	{ _state = state; }

private:
	bool _state;
};

} /* namespace NS_MEMENTO */

#include <iostream>
#include "Memento/Memento.h"
#include "Memento/Originator.h"
using namespace NS_MEMENTO;
using namespace std;
int main(void)
{
	Originator o;
	Memento *m = o.createMemento();
	o.setState(true);
	o.setMemento(m);
	delete m;
	std::cout << o.getState() << std::endl;
}