Abstract_Factory

#include <iostream>
 
using namespace std;
 
#define DESTORY_POINTER(ptr) if (ptr) { delete ptr; ptr = NULL; }
 
class ProductFamilyA
{
public:
    virtual ~ProductFamilyA() {}
    virtual void Action()=;
 
protected:
    ProductFamilyA() {}
};
 
class ProductFamilyB
{
public:
    virtual ~ProductFamilyB() {}
    virtual void Action()=;
 
protected:
    ProductFamilyB() {}
};
 
class Factory
{
public:
    virtual ~Factory() {}
    virtual ProductFamilyA* CreateProductA()=;
    virtual ProductFamilyB* CreateProductB()=;
 
protected:
    Factory() {}
};
 
class ProductA1 : public ProductFamilyA
{
public:
    ProductA1() {}
    void Action() { cout<<"ProductFamilyA->ProductA1::Action"<<endl; }
};
 
class ProductA2 : public ProductFamilyA
{
public:
    ProductA2() {}
    void Action() { cout<<"ProductFamilyA->ProductA2::Action"<<endl; }
};
 
class ProductB1 : public ProductFamilyB
{
public:
    ProductB1() {}
    void Action() { cout<<"ProductFamilyB->ProductB1::Action"<<endl; }
};
 
class ProductB2 : public ProductFamilyB
{
public:
    ProductB2() {}
    void Action() { cout<<"ProductFamilyB->ProductB2::Action"<<endl; }
};
 
class Factory1 : public Factory
{
public:
    ProductFamilyA* CreateProductA() { return new ProductA1; }
    ProductFamilyB* CreateProductB() { return new ProductB1; }
};
 
class Factory2 : public Factory
{
public:
    ProductFamilyA* CreateProductA() { return new ProductA2; }
    ProductFamilyB* CreateProductB() { return new ProductB2; }
};
 
int main(int argc, char *argv[])
{
    Factory* pFactory = NULL;
    ProductFamilyA* pProductFamilyA = NULL;
    ProductFamilyB* pProductFamilyB = NULL;
 
    pFactory = new Factory1;
 
    pProductFamilyA = pFactory->CreateProductA();
    pProductFamilyB = pFactory->CreateProductB();
 
    pProductFamilyA->Action();
    pProductFamilyB->Action();
 
    DESTORY_POINTER(pFactory);
    DESTORY_POINTER(pProductFamilyA);
    DESTORY_POINTER(pProductFamilyB);
 
    pFactory = new Factory2;
    pProductFamilyA = pFactory->CreateProductA();
    pProductFamilyB = pFactory->CreateProductB();
 
    pProductFamilyA->Action();
    pProductFamilyB->Action();
 
    DESTORY_POINTER(pFactory);
    DESTORY_POINTER(pProductFamilyA);
    DESTORY_POINTER(pProductFamilyB);
 
    return ;
}