Abstract factory
作者：周顺利
这个是我理解GoF的abstract factory,最近没事自己按自己理解写的.bcb 6.0下编译正确．
//---------------------------------------------------------------------------
#pragma hdrstop
//---------------------------------------------------------------------------
#pragma argsused
#include <iostream>
using namespace std;
class Product
{
public:
virtual void Creat()=0 ;
};
class myProductA:public Product
{
public:
myProductA()
{
this->Creat();
}
void Creat()
{
cout<<"my ProductA is Created!"<<endl;
}
};
class myProductB:public Product
{
public:
myProductB()
{
this->Creat();
}
void Creat()
{
cout<<"myProductB is created!"<<endl;
}
};
class uProductA:public Product
{
public:
uProductA()
{
this->Creat();
}
void Creat()
{
cout<<"your ProductA is created!"<<endl;
}
};
class uProductB:public Product
{
public:
uProductB()
{
this->Creat();
}
void Creat()
{
cout<<"your productB is created!"<<endl;
}
};
class Factory
{
public:
virtual Product* CreateProductA()=0;
virtual Product* CreateProductB()=0;
};
class myFactory:public Factory
{
public:
Product* CreateProductA()
{
cout<<"my ProductA is returned!"<<endl;
return new myProductA;
}
Product* CreateProductB()
{
cout<<" my ProductB is returned!"<<endl;
return new myProductB;
}
};
class uFactory:public Factory
{
public:
Product* CreateProductA()
{
cout<<"your productA is returned!"<<endl;
return new uProductA;
}
Product* CreateProductB()
{
cout<<"your productB is returned!"<<endl;
return new uProductB;
}
private:
};
class Object
{
public:
void AddProductA(Product& proA)
{
cout<<"A ProductA is add to the gui!"<<endl;
}
void AddProductB(Product& proB)
{
cout<<"A ProductB is add to gui!"<<endl;
}
};
int main(int argc, char* argv[])
{
Object* obj=new Object();
Factory* factory;
cout<<"Please input the type of the obj :u/m"<<endl;
char c;
cin>>c;
if(c=='m')
{
factory=new myFactory;
}
else if(c=='u')
{
factory=new uFactory;
}
Product* proA;
Product* proB;
proA=factory->CreateProductA();
proB=factory->CreateProductB();
obj->AddProductA(*proA);
obj->AddProductB(*proB);
char f;
if(cin>>f)
return 0;
}
//---------------------------------------------------------------------------
下边是一个factory method ,是我前几天在bbs上看见的，也发上来，以便factory 模式更完整．
#pragma warning(disable : 4786)
#include <iostream>
using namespace std;
class Base
{
public:
virtual void displayName()
{ cout << "Base" << endl;}
virtual ~Base(){}
};
class Drive1: virtual public Base
{
public:
virtual void displayName()
{ cout << "Drive1" << endl;}
};
class Drive2: virtual public Base
{
public:
virtual void displayName()
{ cout << "Drive2" << endl;}
};
class Factory
{
public:
static Base *Creater(const char *name)
{
if (strcmp(name, "Drive1") == 0)
{
return new Drive1;
}
else if (strcmp(name, "Drive2") == 0)
{
return new Drive2;
}
else
{ return NULL; }
}
};
void main()
{
Base *d1 = Factory::Creater("Drive1");
Base *d2 = Factory::Creater("Drive2");
d1->displayName();
d2->displayName();
delete d1;
delete d2;
}