The Gof has 23 design patterns , but in most of the design books , the E.G is written in Java , So from now on , I will write about 23 articles to implement them using C++ , the design pattern itself is discussible , so welcome everyone to give his excelent idea to me , My QQ: 286259397 And My MSN :
cxl82116@msn.com.
Welcome every one to express his ideas!
This is the Second Arcticle: ADAPTER PATTERN
While referring to Adapter pattern , there must be a class that play the role of a adapter which can make two or more umcompatible class compatible . To explain this world , the UML diagram can make it clear easily :
diagram 2-1 Class Adapter UML (referred from http://terrylee.cnblogs.com)
diagram 2-2 Object Adapter UML (referred from http://terrylee.cnblogs.com)
E.G Explain them sparetely:
if a Customer request a CUP WITH A CAP , but the orgin system can only supply a CUP , So you it's not compatible between the Request and the Orgin System , so you must find anthor factory who supply the cap ,and make it together to statisfy the customer , implement it in Class Adapter Pattern , Codes goes below.
Class Adapter Pattern:
1
/**//********************************************************************
2
created: 2007/04/21
3 created: 21:4:2007 18:47
4 filename: c:\Visual Studio 2005\Projects\Frist2005\Frist2005\Frist2005.cpp
5 file path: c:\Visual Studio 2005\Projects\Frist2005\Frist2005
6 file base: Frist2005
7 file ext: cpp
8 author: Chang Xinglong(King.C)
9
10 purpose: Adapter Pattern -Class
11
*********************************************************************/
12
13#include "stdafx.h"
14#include <map>
15#include <iostream>
16
17using namespace std;
18
19class OrginSystem
20
{
21
22public:
23 void Supply()
24
{
25 cout<<"Orgin:SupplyACup"<<endl;
26
}
27};
28class CapSystem
29{
30public:
31 void Supply()
32 {
33 cout<<"CapSystem:SupplyACap"<<endl;
34 }
35};
36class Adapter: public OrginSystem , CapSystem
37{
38public:
39 void Supply()
40 {
41 OrginSystem::Supply();
42 CapSystem::Supply();
43 cout<<"So the request has been satisfied!"<<endl;
44 }
45};
46int _tmain(int argc, _TCHAR* argv[])
47{
48 Adapter _adpter;
49 _adpter.Supply();
50 system("pause");
51 return 0;
52}
The Same question , implement it using Object Adapter Pattern:
1/**//********************************************************************
2 created: 2007/04/21
3 created: 21:4:2007 18:47
4 filename: c:\Visual Studio 2005\Projects\Frist2005\Frist2005\Frist2005.cpp
5 file path: c:\Visual Studio 2005\Projects\Frist2005\Frist2005
6 file base: Frist2005
7 file ext: cpp
8 author: Chang Xinglong(King.C)
9
10 purpose: Adapter Pattern-Object
11*********************************************************************/
12
13#include "stdafx.h"
14#include <map>
15#include <iostream>
16
17using namespace std;
18
19class OrginSystem
20{
21
22public:
23 void Supply()
24 {
25 cout<<"Orgin:SupplyACup"<<endl;
26 }
27};
28class CapSystem
29{
30public:
31 void Supply()
32 {
33 cout<<"CapSystem:SupplyACap"<<endl;
34 }
35};
36class Adapter: public OrginSystem , CapSystem
37{
38public:
39 Adapter():_os(new OrginSystem),_cs(new CapSystem)
40 {
41
42 }
43 void Supply()
44 {
45 _os->Supply();
46 _cs->Supply();
47 cout<<"So the request has been satisfied!"<<endl;
48 }
49private:
50 OrginSystem *_os;
51 CapSystem * _cs;
52};
53int _tmain(int argc, _TCHAR* argv[])
54{
55 OrginSystem _orign=new _adpter();
56 _orign.Supply();
57 system("pause");
58 return 0;
59}
60
61
In C++ , Muiltple-Derived pattern is not a recommend pattern, So if possible , use the Obeject -Adpter Pattern.
That's all ,Thanks! if any different idea , send me E-mail.