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            Benjamin

            靜以修身,儉以養德,非澹薄無以明志,非寧靜無以致遠。
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            數據加載中……

            設計模式之factory工廠模式(三):Abstract Factory抽象工廠模式

            Abstract Factory抽象工廠模式實際上只是使用多個Factory Method。每個Factory Method創建一個不同類型的對象。下面的例子代碼假設要創建一個通用的游戲環境,并支持不同類型的游戲。
            #include <iostream>
            using namspace std;

            class Obstacle{
             public:
               virtural void action()=0;
            };//抽象基類

            class Player{
            public:
               virtural void interactWith(Obstacle*)=0;
            };//抽象基類

            class Kitty:public Player{
               virtual void interactWith(Obstacle*){
               cout<<"KungFuGuy now battles against a";
               ob->action();
            };

            class Puzzile:public Obstacle{
            public:
               void action(){
                  cout << "Puzzle" << endl;}
            };

            class NastyWeapon:public Obstacle{
            public:
               void action(){
                  cout << "NastyWeapon" << endl;}
            }; 

            //The abstract factory
            class GameElementFactory{
            public:
               virtual Player* makePlayer()=0;
               virtual Obstacle* makeObstacle()=0;
            };

            //Concreae factories
            class KittiesAndPuzzles:public GameElementFactory{
            public:
               virtual Player* makePlayer() {return new Kitty;}
               virtual Obstacle* makeObstacle() {return new Puzzle;}
            };

            class KillAndDismember:public GameElementFactory{
            public:
               virtual Player* makePlayer() {return new KungFuGuy;}
               virtual Obstacle* makeObstacle() {return new NastyWeapon;}
            };

            class GameEnvironment{
               GameElementFactory* gef;
               Player* p;
               Obstacle* ob;
            public:
               GameEnvironment(GameElementFactory* factory):get(factory),p(factory->makePlayer()),ob(factory->makeObstacle()){}
            void play() {p->interacWith(ob);}
            ~GameEnvrionment(){
               delete p;
               delete ob;
               delete gef;
               }
            };

            int main(){
               GameEnvironment g1(new KittiesAndPuzzles),g2(new KillAndDismember);
               g1.play();
               g2.play();
            }

            /* Output:
            Kitty has encountered a Puzzle
            KungFuGuy now battles against a NastyWeapon *///

            posted on 2009-04-14 22:04 Benjamin 閱讀(415) 評論(1)  編輯 收藏 引用 所屬分類: C/C++

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            //這兩個class要修正一下:
            class Kitty:public Player{
            virtual void interactWith(Obstacle* ob){
            cout<< "Kitty ha encountered a ";
            ob->action();
            }
            };
            class KungFuGuy:public Player{
            virtual void interactWith(Obstacle* ob){
            cout <<"KungFuGuy now battles against a ";
            ob->action();
            }
            };
            2009-09-04 21:05 | 李熙建
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