Factory Method Design Pattern Example

Factory Method Design Pattern Description

Source Code of Factory Design Pattern Example in C++

/*
* File:factory.cpp
* This file is described the Factory Design Pattern with help of example
* Author: Aplha
* Date: 28 Dec 2020
*/

//Header File
#include<iostream>

//Pizza
class Pizza
{
public:
virtual void BakePizza()=0;
};

class DominoPanerrPiza : public Pizza
{
public:
void BakePizza()
{
std::cout<<"DominoPanerrPiza is ready"<<std::endl;
}
};

class DominoCheesePiza : public Pizza
{
public:
void BakePizza()
{
std::cout<<"DominoCheesePiza is ready"<<std::endl;
}
};
//class PizzaFactory
class PizzaFactory
{
protected:
Pizza* _mPizza;
public:
void OrderPizza(std::string type)
{
_mPizza = CreatePizza(type);
_mPizza->BakePizza();
}
private:
virtual Pizza* CreatePizza(std::string type)=0;
};

//DominoPizzaFactory
class DominoPizzaFactory:public PizzaFactory
{
private:
Pizza* CreatePizza(std::string type)
{
Pizza* pz = nullptr;
if(type == "Paneer")
pz = new DominoPanerrPiza;
return pz;
}

};
//Client
int main()
{
std::cout<<"In Main"<<std::endl;
//Select Factory
PizzaFactory* ptr = new DominoPizzaFactory;
//Order the Pizza with type
std::cout<<"Ordering Paneer Pizza from Domino"<<std::endl;
ptr->OrderPizza("Paneer");
std::cout<<"!!!!!!!!!!Got the Pizza!!!!!!!!!"<<std::endl;
return 0;
}

Compilation Command:

g++ -std=c++11 factory.cpp

Output:

In Main
Ordering Paneer Pizza from Domino
DominoPanerrPiza is ready
!!!!!!!!!!Got the Pizza!!!!!!!!!
Factory Method Design Pattern Description