Builder

/** "Product" */
class Pizza {
	private String dough = "";
	private String sauce = "";
	private String topping = "";

	public void setDough(String dough) {
		this.dough = dough;
	}

	public void setSauce(String sauce) {
		this.sauce = sauce;
	}

	public void setTopping(String topping) {
		this.topping = topping;
	}
}

/** "Abstract Builder" */
abstract class PizzaBuilder {
	protected Pizza pizza;

	public Pizza getPizza() {
		return pizza;
	}

	public void createNewPizzaProduct() {
		pizza = new Pizza();
	}

	public abstract void buildDough();

	public abstract void buildSauce();

	public abstract void buildTopping();
}

/** "ConcreteBuilder" */
class HawaiianPizzaBuilder extends PizzaBuilder {
	public void buildDough() {
		pizza.setDough("cross");
	}

	public void buildSauce() {
		pizza.setSauce("mild");
	}

	public void buildTopping() {
		pizza.setTopping("ham+pineapple");
	}
}

/** "ConcreteBuilder" */
class SpicyPizzaBuilder extends PizzaBuilder {
	public void buildDough() {
		pizza.setDough("pan baked");
	}

	public void buildSauce() {
		pizza.setSauce("hot");
	}

	public void buildTopping() {
		pizza.setTopping("pepperoni+salami");
	}
}

/** "Director" */
class Cook {
	private PizzaBuilder pizzaBuilder;

	public void setPizzaBuilder(PizzaBuilder pb) {
		pizzaBuilder = pb;
	}

	public Pizza getPizza() {
		return pizzaBuilder.getPizza();
	}

	public void constructPizza() {
		pizzaBuilder.createNewPizzaProduct();
		pizzaBuilder.buildDough();
		pizzaBuilder.buildSauce();
		pizzaBuilder.buildTopping();
	}
}

/** Donant el tipus de pizza a construir. */
public class BuilderExample {
	public static void main(String[] args) {
		Cook cook = new Cook();
		PizzaBuilder hawaiianPizzaBuilder = new HawaiianPizzaBuilder();
		PizzaBuilder spicyPizzaBuilder = new SpicyPizzaBuilder();

		cook.setPizzaBuilder(hawaiianPizzaBuilder);
		cook.constructPizza();

		Pizza pizza = cook.getPizza();
	}
}

# Producte
class Pizza:
 def __init__(self):
 self.dough = None
 self.sauce = None
 self.topping = None

 def set_dough(self, dough):
 self.dough = dough

 def set_sauce(self, sauce):
 self.sauce = sauce

 def set_topping(self, topping):
 self.topping = topping

# Abstract Builder
class PizzaBuilder:
 def __init__(self):
 self.pizza = None

 def get_pizza(self):
 return self.pizza

 def create_new_pizza_product(self):
 self.pizza = Pizza()

# ConcreteBuilder
class HawaiianPizzaBuilder(PizzaBuilder):
 def build_dough(self):
 self.pizza.set_dough("cross")

 def build_sauce(self):
 self.pizza.set_sauce("mild")

 def build_topping(self):
 self.pizza.set_topping("ham+pineapple")

# Director
class Cook:
 def __init__(self):
 self.pizza_builder = None

 def set_pizza_builder(self, pb):
 self.pizza_builder = pb

 def get_pizza(self):
 return self.pizza_builder.get_pizza()

 def construct_pizza(self):
 self.pizza_builder.create_new_pizza_product()
 self.pizza_builder.build_dough()
 self.pizza_builder.build_sauce()
 self.pizza_builder.build_topping()

# A given type of pizza being constructed.
if __name__ == '__main__':
 cook = Cook()
 cook.set_pizza_builder(HawaiianPizzaBuilder())
 cook.construct_pizza()
 pizza = cook.get_pizza()