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/*

* C++ Design Patterns: Factory Method

* Author: Jakub Vojvoda [github.com/JakubVojvoda]

* 2016

*

* Source code is licensed under MIT License

* (for more details see LICENSE)

*

*/

#include <iostream>

/*

* Product

* products implement the same interface so that the classes can refer

* to the interface not the concrete product

*/

class Product {

public:

virtual std::string getName() = 0;

// ...

};

/*

* Concrete Product

* define product to be created

*/

class ConcreteProductA : public Product {

public:

std::string getName() {

return "type A";

}

// ...

};

/*

* Concrete Product

* define product to be created

*/

class ConcreteProductB : public Product {

public:

std::string getName() {

return "type B";

}

// ...

};

/*

* Creator

* contains the implementation for all of the methods

* to manipulate products except for the factory method

*/

class Creator {

public:

virtual Product* createProductA() = 0;

virtual Product* createProductB() = 0;

// ...

};

/*

* Concrete Creator

* implements factory method that is responsible for creating

* one or more concrete products ie. it is class that has

* the knowledge of how to create the products

*/

class ConcreteCreator : public Creator {

public:

Product* createProductA() {

return new ConcreteProductA();

}

Product* createProductB() {

return new ConcreteProductB();

}

// ...

};

int main()

{

Creator *creator = new ConcreteCreator();

Product *p1 = creator->createProductA();

std::cout << "Product: " << p1->getName() << std::endl;

Product *p2 = creator->createProductB();

std::cout << "Product: " << p2->getName() << std::endl;

return 0;

}