018 --- 第22章 桥接模式


简述:

  桥接模式:将抽象部分与它的实现部分分离,是它们都可以独立的变化。

  桥接模式包括:抽象类、具体抽象类、实现类、具体实现类。

    抽象类:抽象要执行的操作。

    具体抽象类:包含实现类的指针,实现抽象类的虚函数。

    实现类:具体实现的抽象。

    具体实现类:实现类的具体实现。

桥接模式:

 1 #include 
 2 using namespace std;
 3 
 4 // 实现类
 5 class CImplementor
 6 {
 7 public:
 8     virtual void Operation() = 0;
 9 };
10 
11 // 具体实现类A
12 class CConcreteImplementorA : public CImplementor
13 {
14 public:
15     virtual void Operation()
16     {
17         cout << "具体实现A的方法执行" << endl;
18     }
19 };
20 
21 // 具体实现类B
22 class CConcreteImplementorB : public CImplementor
23 {
24 public:
25     virtual void Operation()
26     {
27         cout << "具体实现B的方法执行" << endl;
28     }
29 };
30 
31 // 抽象类
32 class CAbstraction
33 {
34 protected:
35     CImplementor* m_pImplementor;
36     
37 public:
38     void SetImplementor(CImplementor* pImplementor)
39     {
40         m_pImplementor = pImplementor;
41     }
42 
43     virtual void Operation()
44     {
45         m_pImplementor->Operation();
46     }
47 };
48 
49 // 具体抽象类
50 class CRefinedAbstraction : public CAbstraction
51 {
52 public:
53     virtual void Operation()
54     {
55         m_pImplementor->Operation();
56     }
57 };
58 
59 int main()
60 {
61     CAbstraction Abstraction;
62     CConcreteImplementorA ImplementorA;
63     Abstraction.SetImplementor(&ImplementorA);
64     Abstraction.Operation();
65 
66     CConcreteImplementorB ImplementorB;
67     Abstraction.SetImplementor(&ImplementorB);
68     Abstraction.Operation();
69 
70     system("pause");
71     return 0;
72 }

输出结果:

例:手机品牌和手机软件桥接

代码如下:

  1 #include 
  2 using namespace std;
  3 
  4 // 手机软件类(实现类)
  5 class CHandsetSoft
  6 {
  7 public:
  8     virtual void Run() = 0;
  9 };
 10 
 11 // 手机游戏类(具体实现类)
 12 class CHandsetGame : public CHandsetSoft
 13 {
 14 public:
 15     virtual void Run()
 16     {
 17         cout << "运行手机游戏" << endl;
 18     }
 19 };
 20 
 21 // 手机通讯录类(具体实现类)
 22 class CHandsetAddressList : public CHandsetSoft
 23 {
 24 public:
 25     virtual void Run()
 26     {
 27         cout << "运行手机通讯录" << endl;
 28     }
 29 };
 30 
 31 // 手机MP3播放类(具体实现类)
 32 class CHandsetMP3 : public CHandsetSoft
 33 {
 34 public:
 35     virtual void Run()
 36     {
 37         cout << "运行手机MP3播放" << endl;
 38     }
 39 };
 40 
 41 // 手机品牌类(抽象类)
 42 class CHandsetBrand
 43 {
 44 protected:
 45     CHandsetSoft* m_pSoft;
 46 
 47 public:
 48 
 49     // 设置手机软件
 50     void SetHandsetSoft(CHandsetSoft* pSoft)
 51     {
 52         m_pSoft = pSoft;
 53     }
 54 
 55     // 运行
 56     virtual void Run() = 0;
 57 };
 58 
 59 // 手机品牌N类(具体抽象类)
 60 class CHandsetBrandN : public CHandsetBrand
 61 {
 62 public:
 63     virtual void Run()
 64     {
 65         m_pSoft->Run();
 66     }
 67 };
 68 
 69 // 手机品牌M类(具体抽象类)
 70 class CHandsetBrandM : public CHandsetBrand
 71 {
 72 public:
 73     virtual void Run()
 74     {
 75         m_pSoft->Run();
 76     }
 77 };
 78 
 79 // 手机品牌S类(具体抽象类)
 80 class CHandsetBrandS : public CHandsetBrand
 81 {
 82 public:
 83     virtual void Run()
 84     {
 85         m_pSoft->Run();
 86     }
 87 };
 88 
 89 int main()
 90 {
 91     CHandsetGame Game;
 92     CHandsetAddressList AddressList;
 93     CHandsetMP3 MP3;
 94 
 95     cout << "手机N" << endl;
 96     CHandsetBrandN n;
 97     n.SetHandsetSoft(&Game);
 98     n.Run();
 99     n.SetHandsetSoft(&AddressList);
100     n.Run();
101     n.SetHandsetSoft(&MP3);
102     n.Run();
103     cout << "手机N" << endl;
104     cout << endl;
105 
106     cout << "手机M" << endl;
107     CHandsetBrandM m;
108     m.SetHandsetSoft(&Game);
109     m.Run();
110     m.SetHandsetSoft(&AddressList);
111     m.Run();
112     m.SetHandsetSoft(&MP3);
113     m.Run();
114     cout << "手机M" << endl;
115     cout << endl;
116 
117     cout << "手机S" << endl;
118     CHandsetBrandS s;
119     s.SetHandsetSoft(&Game);
120     s.Run();
121     s.SetHandsetSoft(&AddressList);
122     s.Run();
123     s.SetHandsetSoft(&MP3);
124     s.Run();
125     cout << "手机S" << endl;
126     cout << endl;
127 
128     system("pause");
129     return 0;
130 }

输出结果: