Adapter Pattern

1.Adapter模式用来实现将一个类（第三方库）的接口转换为客户（购买使用者）希望的接口。

Adapter模式有两种类别：类模式、对象模式。类模式采用继承的方式复用Adaptee的接口，对象模式通过组合的方式实现Adaptee的复用。

2.Adapter模式结构图：

3.类模式实现

 1 #ifndef _ADAPTER_H_ 
 2 #define _ADAPTER_H_
 3 
 4 class Target 
 5 { 
 6 public: 
 7     Target();
 8     virtual ~Target();
 9     virtual void Request();
10 protected:
11 private:
12 };
13 
14 class Adaptee 
15 { 
16 public: 
17     Adaptee();
18     ~Adaptee();
19     void SpecificRequest();
20 protected:
21 private:
22 };
23 
24 class Adapter:public Target,private Adaptee 
25 { 
26 public:
27     Adapter();
28     ~Adapter();
29     void Request();
30 protected:
31 private:
32 };
33 
34 #endif

Adapter.h

 1 #include "Adapter.h"
 2 #include <iostream>
 3 
 4 Target::Target() 
 5 {
 6 
 7 }
 8 Target::~Target()
 9 {
10 
11 }
12 void Target::Request() 
13 { 
14     std::cout<<"Target::Request"<<std::endl;
15 }
16 Adaptee::Adaptee() 
17 {
18 
19 }
20 Adaptee::~Adaptee() 
21 {
22 
23 }
24 void Adaptee::SpecificRequest()
25 { 
26     std::cout<<"Adaptee::SpecificRequest" <<std::endl; 
27 }
28 Adapter::Adapter()
29 {
30 
31 }
32 Adapter::~Adapter() 
33 {
34 
35 }
36 void Adapter::Request() 
37 { 
38     this->SpecificRequest();
39 }

Adapter.cpp

 1 #include "Adapter.h"
 2 #include <iostream> 
 3 using namespace std;
 4 
 5 int main(int argc,char* argv[]) 
 6 { //Adapter* adt = new Adapter();
 7     Target* adt = new Adapter();
 8     adt->Request();
 9     return 0; 
10 }

main.cpp

4.对象模式实现

 1 #ifndef _ADAPTER_H_ 
 2 #define _ADAPTER_H_
 3 
 4 class Target 
 5 { 
 6 public: 
 7     Target();
 8     virtual ~Target();
 9     virtual void Request();
10 protected:
11 private:
12 };
13 
14 class Adaptee 
15 { 
16 public: 
17     Adaptee();
18     ~Adaptee();
19     void SpecificRequest();
20 protected:
21 private:
22 };
23 
24 class Adapter:public Target 
25 { 
26 public:
27     Adapter(Adaptee* ade);
28     ~Adapter();
29     void Request();
30 protected:
31 private:
32     Adaptee* _ade;
33 };
34 
35 #endif

Adapter.h

 1 #include "Adapter.h"
 2 #include <iostream>
 3 
 4 Target::Target() 
 5 {
 6 
 7 }
 8 Target::~Target()
 9 {
10 
11 }
12 void Target::Request() 
13 { 
14     std::cout<<"Target::Request"<<std::endl;
15 }
16 Adaptee::Adaptee() 
17 {
18 
19 }
20 Adaptee::~Adaptee() 
21 {
22 
23 }
24 void Adaptee::SpecificRequest()
25 { 
26     std::cout<<"Adaptee::SpecificRequest" <<std::endl; 
27 }
28 Adapter::Adapter(Adaptee* ade)
29 {
30     this->_ade = ade;
31 }
32 Adapter::~Adapter() 
33 {
34 
35 }
36 void Adapter::Request() 
37 { 
38     _ade->SpecificRequest();
39 }

Adapter.cpp

 1 #include "Adapter.h"
 2 #include <iostream> 
 3 using namespace std;
 4 
 5 int main(int argc,char* argv[]) 
 6 { //Adapter* adt = new Adapter();
 7     Adaptee* ade = new Adaptee;
 8     Target* adt = new Adapter(ade);
 9     adt->Request();
10     return 0; 
11 }

main.cpp