AF是一种对象创建型模式。
对象创建型模式：将实例化委托给另一个对象。类创建型模式用继承来改变被初始化的类。
在设计模式中提到：“AbstractFactory类通常用FactoryMethod实现，但也可以用Prototype实现。”
AF模式侧重于产品的系列性，增加对某一产品的支持将比较困难。ＦＭ模式则没有此限制，ＦＭ又被称为虚构造函数。
http://code.google.com/p/tcplex/source/browse/trunk/Design_Pattern/af.cpp
#include <iostream>
using namespace std;
class MapSite
{
virtual void Enter() = 0;
};
class Room:public MapSite
{
virtual void Enter(){
cout << "Entering room!" << endl;
}
};
class Door:public MapSite
{
virtual void Enter(){
cout << "Entering door!" << endl;
}
};
class Maze
{
public:
Maze();
void AddRoom(Room*){}
void AddDoor(Door*){}
};
class MazeFactory
{
public:
virtual Maze* MakeMaze()const{
return new Maze();
}
virtual Room* MakeRoom()const{
return new Room();
}
virtual Door* MakeDoor()const{
return new Door();
}
};
class MazeGame
{
public:
Maze* CreateMaze(MazeFactory& factory){
Maze* mz = factory.MakeMaze();
Room* rm = factory.MakeRoom();
Door* dr = factory.MakeDoor();
mz->AddRoom(rm);
mz->AddDoor(dr);
return mz;
}
};
http://code.google.com/p/tcplex/source/browse/trunk/Design_Pattern/af2.cpp
#include <iostream>
using namespace std;
class Clonable
{
public:
virtual Clonable* Clone() = 0;
};
class MapSite
{
public:
virtual void Enter() = 0;
};
class Room:public MapSite, Clonable
{
public:
virtual void Enter(){
cout << "Entering room!" << endl;
}
virtual Room* Clone(){
return new Room();
}
};
class Door:public MapSite, Clonable
{
public:
virtual void Enter(){
cout << "Entering door!" << endl;
}
virtual Door* Clone(){
return new Door();
}
};
class Maze:public Clonable
{
public:
Maze();
void AddRoom(Room*){}
void AddDoor(Door*){}
virtual Maze* Clone(){
return new Maze();
}
};
class MazeFactory
{
public:
MazeFactory(Maze* maze, Room* room, Door* door)
:maze_(maze), room_(room), door_(door){}
virtual Maze* MakeMaze()const{
return maze_->Clone();
}
virtual Room* MakeRoom()const{
return room_->Clone();
}
virtual Door* MakeDoor()const{
return door_->Clone();
}
private:
Maze* maze_;
Door* door_;
Room* room_;
};
class MazeGame
{
public:
Maze* CreateMaze(MazeFactory& factory){
Maze* mz = factory.MakeMaze();
Room* rm = factory.MakeRoom();
Door* dr = factory.MakeDoor();
mz->AddRoom(rm);
mz->AddDoor(dr);
return mz;
}
};