// examplemod-template-26.1.2/src/main/java/com/example/examplemod/ModDataComponents.java
public class ModDataComponents {
 
    // 26.1: createDataComponents 는 (레지스트리 키, modid) 2-인자. 단일 String 오버로드 없음.
    public static final DeferredRegister.DataComponents COMPONENTS =
        DeferredRegister.createDataComponents(Registries.DATA_COMPONENT_TYPE, ExampleMod.MODID);
 
    // 정수형 충전량 컴포넌트
    public static final Supplier<DataComponentType<Integer>> CHARGE =
        COMPONENTS.registerComponentType(
            "charge",
            builder -> builder
                .persistent(Codec.INT)                      // 저장/로드용 Codec
                .networkSynchronized(ByteBufCodecs.INT)     // 네트워크 동기화용 StreamCodec
        );
 
    // 문자열형 소유자 컴포넌트
    public static final Supplier<DataComponentType<String>> OWNER =
        COMPONENTS.registerComponentType(
            "owner",
            builder -> builder
                .persistent(Codec.STRING)
                .networkSynchronized(ByteBufCodecs.STRING_UTF8)
        );
}

// examplemod-template-26.1.2/src/main/java/com/example/examplemod/ExampleMod.java
@Mod("examplemod")
public class ExampleMod {
    public ExampleMod(IEventBus modEventBus) {
        ModDataComponents.COMPONENTS.register(modEventBus);
        // ... 나머지 등록
    }
}

// examplemod-template-26.1.2/src/main/java/com/example/examplemod/item/MagicWandItem.java
ItemStack stack = ...;
 
// 설정 — 충전량을 50으로
stack.set(ModDataComponents.CHARGE.get(), 50);
 
// 읽기 — 없으면 기본값 0 반환
int charge = stack.getOrDefault(ModDataComponents.CHARGE.get(), 0);
 
// 삭제 — 컴포넌트 제거
stack.remove(ModDataComponents.CHARGE.get());

// examplemod-template-26.1.2/src/main/java/com/example/examplemod/item/MagicWandItem.java
public class MagicWandItem extends Item {
 
    private static final int MAX_CHARGE = 5;
 
    public MagicWandItem(Properties properties) {
        super(properties);
    }
 
    @Override
    public InteractionResult use(Level level, Player player, InteractionHand hand) {
        // 손에 든 스택을 직접(in-place) 수정한다. 26.1 에서 InteractionResultHolder 가 삭제되어
        // 더 이상 새 스택을 래핑해 반환하지 않는다.
        ItemStack stack = player.getItemInHand(hand);
 
        int current = stack.getOrDefault(ModDataComponents.CHARGE.get(), 0);
 
        if (current >= MAX_CHARGE) {
            // 방전
            stack.set(ModDataComponents.CHARGE.get(), 0);
            player.sendSystemMessage(Component.literal("방전!"));
        } else {
            // 충전
            stack.set(ModDataComponents.CHARGE.get(), current + 1);
            player.sendSystemMessage(
                Component.literal("충전량: " + (current + 1) + "/" + MAX_CHARGE)
            );
        }
 
        return InteractionResult.SUCCESS;
    }
}

// examplemod-template-26.1.2/src/main/java/com/example/examplemod/ExampleMod.java
// 아이템 등록 — registerItem 의 props 람다 안에서 변형을 적용한다.
public static final DeferredItem<MagicWandItem> MAGIC_WAND =
    ITEMS.registerItem("magic_wand", MagicWandItem::new, p -> p.stacksTo(1));

// examplemod-template-26.1.2/src/main/java/com/example/examplemod/data/FoodFreshness.java
public record FoodFreshness(int freshness) {
 
    // 저장/로드용 Codec — 0~100 범위로 검증한다.
    public static final Codec<FoodFreshness> CODEC =
        Codec.intRange(0, 100).xmap(FoodFreshness::new, FoodFreshness::freshness);
 
    // 네트워크 동기화용 StreamCodec. VAR_INT 기반이라 버퍼 타입은 ByteBuf 이다.
    public static final StreamCodec<ByteBuf, FoodFreshness> STREAM_CODEC =
        ByteBufCodecs.VAR_INT.map(FoodFreshness::new, FoodFreshness::freshness);
}

// ModDataComponents.java에 추가
public static final Supplier<DataComponentType<FoodFreshness>> FRESHNESS =
    COMPONENTS.registerComponentType(
        "freshness",
        builder -> builder
            .persistent(FoodFreshness.CODEC)
            .networkSynchronized(FoodFreshness.STREAM_CODEC)
    );

stack.set(ModDataComponents.FRESHNESS.get(), new FoodFreshness(100));
FoodFreshness freshness = stack.getOrDefault(
    ModDataComponents.FRESHNESS.get(),
    new FoodFreshness(0)
);