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Factory Method
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| interface Pizza { | |
| flavor: string; | |
| pieces: number; | |
| cut: () => PizzaSlice | null; | |
| } | |
| interface PizzaSlice { } | |
| class MuzzarellaPizzaSlice implements PizzaSlice { } | |
| class MuzzarellaPizza implements Pizza { | |
| flavor: string = 'Muzzarella'; | |
| pieces: number = 8; | |
| cut(): PizzaSlice | null { | |
| if (this.pieces >= 1) { | |
| this.pieces -= 1; | |
| return new MuzzarellaPizzaSlice(); | |
| } | |
| return null; | |
| }; | |
| } | |
| abstract class Pizzeria { | |
| public eatPizza() { | |
| const pizza: Pizza = this.makePizza(); | |
| pizza.cut(); | |
| } | |
| protected abstract makePizza(): Pizza; | |
| } | |
| class PizzaHut extends Pizzeria { | |
| protected makePizza(): Pizza { | |
| return new MuzzarellaPizza(); | |
| } | |
| } |
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