设计模式11——职责链模式

 1 #ifndef Reschain_H_H
 2 #define Reschain_H_H
 3 
 4 #include <iostream>
 5 #include <string>
 6 using namespace std;
 7 
 8 
 9 class Event
10 {
11 public:
12     Event() : strInfo(""), level(0) {}
13     void setLevel(int level0) { level = level0; }
14     int getLevel() { return level; }
15     void setInfo(string str) { strInfo = str; }
16     void display() { cout << strInfo << endl; }
17 
18 private:
19     string strInfo;
20     int level;
21 };
22 
23 
24 class Manager
25 {
26 public:
27     Manager() : upper(NULL) {}
28     virtual ~Manager() {}
29     void setUpper(Manager *upper0) { upper = upper0; }
30     virtual void process(Event *event) = 0;
31 
32 protected:
33     Manager *upper;
34 };
35 
36 
37 class Major : public Manager
38 {
39 public:
40     virtual void process(Event *event){
41         if( event->getLevel()>0 && event->getLevel()<10 ){
42             cout << "Major processes the event!" << endl;
43         }
44         else{
45             upper->process(event);
46         }
47     }
48 };
49 
50 class Boss : public Manager
51 {
52 public:
53     virtual void process(Event *event){
54         if( event->getLevel() > 10 ){
55             cout << "Boss processes the event!" << endl;
56         }
57     }
58 };
59 
60 void ReschainTest()
61 {
62     Manager *manager1 = new Major();
63     Manager *manager2 = new Boss();
64     manager1->setUpper(manager2);
65     Event *event = new Event();
66 
67     event->setLevel(8);
68     manager1->process(event);
69 
70     event->setLevel(15);
71     manager1->process(event);
72 
73 }
74 
75 
76 #endif