???????

??? ???? ??? ??? ????. ?? ??? ????? ???? ?? ??? ?????. ?, Simple Factory? ????? ??? ??? ???? ???? ?? ?????? ??????.

??? ???? ??? ??? ???? ??? ????. ???? ??? ?? ?? Simple Factory? ?? ???????. ?? Simple Factory? ??? Factory ??? ?? ??? ? ????.

Simple Factory? ?? ??? ??? ? ????

???? ??? ?? ?????? ?????? ?? ??? ?? ??? ??? ??? ??? ???. ?????? ??????? ?? ?? ??????. ????? ???? ???? ???? ??????? ?? Simple ???? ??????? ?? ??? ??? ? ???? Simple ???? ?????. ?? ?? ??????? ???? ?? ??? ?? ??????.

??

??? ???? ?? ????. ?????, ???? ? ??? ??? ??? ?? ???? ?????.

? ?? ??? ??? ????.

// Client orders a burger
Burger orderBurger(String type) {
    Burger burger;

    if (type.equals("beef")) {
        burger = new BeefBurger();
    } else if (type.equals("chicken")) {
        burger = new ChickenBurger();
    } else if (type.equals("fish")) {
        burger = new FishBurger();
    }

    burger.prepareBun();
    burger.grillPatty();
    burger.addToppings();
    burger.wrap();

    return burger;
}

??? ?????? ?? ??? ?? ???? ??? ????. ??? if ?? ???? ?? ??? ???? ???? ???? ????????.
? ??? ???? ??? ????? ??? ?? ??? ???? ???? ???? ?????!! ? ?? ?? ??? ???? ?? ?? ??? ???? ????? ??? ?????. ????? ??? ???? ???? ???. ?, ??? ?? ???? ????.

???

??? ???? ?? ?? ??? ???? ??? ???? ?? ? ????. ??? ????? ??? ?? ??? ?? ??? ??? ??? ???? ??? ? ????. ? ??? "??? ?? ???"?? ???. ???? ?? ?????? ?? ??? ?? ??? ??? ????? prepareBun(), grillPatty(), addToppings(), Wrap() ????? ??? ?? ???? ???? ??? ???? ????.
Simple Factory? ??? ?? ????? ???? ????? ????. SimpleBurgerFactory.createBurger() ???? ???? BurgerRestaurant, BurgerCateringShop? ?? ?? ????? ???? ?? ?? ????.

1. ?????
   ?????? SimpleBurgerFactory? ?? ?? ?? ??? ????????. ????? ???? ?? ?? ???? ??? ???? ? ? ????. ?, ?? ?? ??? ?? ??????? ???????.

2. ???????
   ? ???? ???? ?, ? ?? ?? ??? ??????! createBurger()? ?????? ? ???? ???? ??? ???????? ??? ??? ?? ???? ?????(?? ??????? ??? ????? ?? ? ????!). createBurger()? BurgerType ???? ???? ???? ? ?? ??? ?????.

3. ??
   ? ?? ???? ?? ?? ??? ?? ?????? ???? ?? ??? ?????.

4. ?? ?? ???
   ???? ??? ??? ????. Burger ???? ???? ? ???? ????? ?? ??? ??? ? ????.

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// Client orders a burger
Burger orderBurger(String type) {
    Burger burger;

    if (type.equals("beef")) {
        burger = new BeefBurger();
    } else if (type.equals("chicken")) {
        burger = new ChickenBurger();
    } else if (type.equals("fish")) {
        burger = new FishBurger();
    }

    burger.prepareBun();
    burger.grillPatty();
    burger.addToppings();
    burger.wrap();

    return burger;
}

public enum BurgerType {
    BEEF,
    CHICKEN,
    FISH,
    VEGGIE
}

// Abstract Product
public abstract class Burger {

    public BurgerType burgerType;
    public List<String> toppings = new ArrayList<>();

    public void prepareBun() {
        System.out.println("Preparing a bun");
    }

    public void grillPatty() {
        if (burgerType == null) {
            throw new IllegalStateException("pattyType is undefined");
        }
        System.out.println("Grill a " + burgerType + " patty");
    }

    public void addToppings() {
        for (String item : toppings) {
            System.out.println("Add " + item);
        }
    }

    public void wrap() {
        System.out.println("Wrap a burger up");
    }
}

// Concrete product
public class BeefBurger extends Burger {

    public BeefBurger() {
        burgerType = BurgerType.BEEF;
        List<String> items = List.of("lettuce", "pickle slices", "tomato slice", "BBQ sauce");
        toppings.addAll(items);
    }
}

// Concrete product
public class VeggieBurger extends Burger {

    public VeggieBurger() {
        burgerType = BurgerType.VEGGIE;
        List<String> items = List.of("smoked paprika", "garlic chips", "crushed walnuts", "veggie sauce");
        toppings.addAll(items);
    }

    // Concrete product can implement specific behavior that differs from other products
    @Override
    public void wrap() {
        System.out.println("Wrapping paper shouldn't print any meats but vegetables");
    }
}

// Simple factory, responsible for instantiating an object
public class SimpleBurgerFactory {

    public static Burger createBurger(BurgerType type) {
        return switch (type) {
            case BEEF -> new BeefBurger();
            case CHICKEN -> new ChickenBurger();
            case FISH -> new FishBurger();
            case VEGGIE -> new VeggieBurger();
            default -> throw new IllegalArgumentException("unknown burger type");
        };
    }
}

??:

public class Client {

    public static void main(String[] args) {
        Burger burger = orderBurger(BurgerType.VEGGIE);
        System.out.println(burger); // Check if the object is actually veggie burger
    }

    public static Burger orderBurger(BurgerType type) {
        // Factory is responsible for object creation
        Burger burger = SimpleBurgerFactory.createBurger(type);

        burger.prepareBun();
        burger.grillPatty();
        burger.addToppings();
        burger.wrap();

        return burger;
    }
}

??

• ?? ?????? ?? ???? ??? ??? ? ???? ? ????. ?? ???? Factory ???? ?? ???? ?? ????.

??? ???? ??

• ??? ?????? ????? ?? ?? ??? ?? ??? ???? ??? ??? ???? ?? ??, ??? ????? ?? ?? ???? ??? ? ????.
• ??? ???? ?? ?? ???? ???? ??? ????? ????? ??? ????? ?????. ??, ??? ???? ?? ???? ?? ????? ??? ?? ?? ???? ?? ???? ???? ?????? ?? ?????? ?? ???? ??? ?????.

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???? ?? ??? ?? ??? ??? ? ????.
GitHub ???

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????? ????? :)

? ??? ?????? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!