팩토리 메소드 패턴 (Factory Method)

어떠한 객체를 생성할 것인지를 자식 클래스 마다 다르게 하여, 클래스마다 다른 객체를 갖도록 하는 것을 팩토리 메소드 패턴이라고 합니다.

class ItemOption
{
	//각종멤버
};

class ItemOptionHeal : public ItemOption
{
	//체력회복기능
};

class ItemOptionPoison : public ItemOption
{
	//독기능
};

class ItemDurationType
{
	//각종멤버
};

class ItemDurationTypeCount : public ItemDurationType //갯수제
{
	//갯수제처리
};

class ItemDurationTypeTime : public ItemDurationType //시간제
{
	//시간제처리
};

class Item
{
	virtual ItemOption * CreateItemOption(){return new ItemOption;}
	virtual ItemDurationType * CreateItemDurationType(){return new ItemDurationType;}
};

class EquipItem : public Item //장착아이템
{
	virtual ItemDurationType * CreateItemDurationType(){return new ItemDurationTypeTime;}
};


class InstanceItem : public Item //갯수제사용아이템
{
	virtual ItemDurationType * CreateItemDurationType(){return new ItemDurationTypeCount;}
};

class ItemHealingPotion : public EquipItem
{
	virtual ItemOption * CreateItemOption(){return new ItemOptionHeal;}
};

class ItemPoisonDagger : public InstanceItem
{
	virtual ItemOption * CreateItemOption(){return new ItemOptionPoison;}
};