Brittany JohnsonCSCI360

Abstract Factory Design Pattern

Name: Abstract Factory

Nickname: Kit or Toolkit

What is it? A Creational software design pattern; similar to the Factory Method pattern.

What does it do? It provides a way of encapsulating individual factories into a group with a common theme.

Background

Benefits: low coupling ease of changeability promotes consistency

Downfall: difficult to support new kinds of products

Consequences

UML Diagram

public interface PizzaIngredientFactory {

Dough createDough();

Sauce createSauce();

Cheese createCheese();

}

public class NYPizzaIngredientFactory implements PizzaIngredientFactory {

public NYPizzaIngredientFactory(){

}

public Cheese createCheese(){

return new ReggianoCheese();

}

public Dough createDough(){

return new ThinCrustDough();

}

public Sauce createSauce(){

return new MarinaraSauce();

}

public Veggies [] createVeggies(){

Veggies veggies [] = {new Olives(),

new GreenPeppers() };

return veggies;

}

public Pepperoni createPepperoni(){

return new ThinPepperoni();

}

}

Abstract Factory & Factory

public class NYPizza extends Pizza{

public NYPizza(){

}

public void prepare(String PizzaType){

NYPizzaIngredientFactory NYP = new NYPizzaIngredientFactory();

NYP.createCheese();

NYP.createDough();

NYP.createPepperoni();

NYP.createSauce();

NYP.createVeggies();

}

}

public static void main(String[] args) {

System.out.println("What kind of Pizza would you like? Press NY for New York style and C for Chicago style.");

String pType = "";

BufferedReader in = new BufferedReader(new InputStreamReader(System.in));

try {

pType = in.readLine();

if (pType.equals("NY")){

NYPizza nyPizza = new NYPizza();

nyPizza.prepare(pType);

System.out.println("Your New York Style Pizza has been created.");

}

......

}

Subclass and Client