import java.util.ArrayList;

import java.util.HashMap;

import java.util.List;

import java.util.function.Supplier;

/**

* Created by dmorales on 8/12/2015.

*/

public class AbstractFactoryJava8 {

public interface Vehicle {}

public static class Car implements Vehicle {

@Override

public String toString() {

return "Car";

}

}

public static class Car2 extends Car {

@Override

public String toString() {

return "car2";

}

}

public static class Moto implements Vehicle {

@Override

public String toString() {

return "Moto";

}

}

public static class VehicleFactory {

private final HashMap<String, Supplier<? extends Vehicle>> map = new HashMap<>();

public void register(String name, Supplier<? extends Vehicle> supplier) {

map.put(name, supplier);

}

public Vehicle create(String name) {

return map.getOrDefault(name,

() -> { throw new IllegalArgumentException("Unkown " + name);})

.get();

}

}

public static void main(String[] args) {

VehicleFactory factory = new VehicleFactory();

factory.register("car", Car::new);

factory.register("car2", Car2::new);

factory.register("moto", Moto::new);

Moto moto = new Moto();

factory.register("moto2", () -> moto);

Vehicle vehicle1 = factory.create("car");

System.out.println(vehicle1);

Vehicle vehicle2 = factory.create("moto");

System.out.println(vehicle2);

// Vehicle vehicle3 = factory.create("doesntexist");

// System.out.println(vehicle3);

List<? extends Number> a = new ArrayList<>();

List<? super Vehicle> x = new ArrayList<>();

x.add(new Car());

x.add(new Car2());

}

}