Lombok @FieldDefaults Anotasyonu - Üye Alanları Örneğin Private ve Final Yapar

Giriş

Şu satırı dahil ederiz

import lombok.experimental.FieldDefaults;

Açıklaması şöyle

This annotation provides a way to set default modifiers for the fields in a class. You can control the access level of fields and specify whether they should be final. This is particularly useful in Spring-based applications where you might want to establish consistent field-level access control without explicitly declaring it for each field.

Açıklaması şöyle

When you annotate a class with @FieldDefaults, you can specify two key elements:

Access Level: The visibility of the fields, such as PRIVATE, PROTECTED, PACKAGE, or PUBLIC. The default value is PRIVATE.

Final: A Boolean value specifying whether the fields should be final. The default is false.

makeFinal Alanı

Açıklaması şöyle. Yani @Data ile üretilecek setter metodları engelleyebilir

Setting makeFinal = true works well when you are creating immutable classes, but it does limit the functionality of other Lombok annotations like @Setter. In classes annotated with @Data, the makeFinal = true setting will essentially disable the generation of setter methods, because final fields cannot be modified once initialized.

Örnek

Şöyle yaparız

import lombok.Data;
import lombok.experimental.FieldDefaults;
import lombok.AccessLevel;

@Data
@FieldDefaults(level = AccessLevel.PRIVATE, makeFinal = true)
public class SecureBook {
  String title;
  String author;
  int pages;
}

Örnek

Elimizde şöyle bir kod olsun

@Slf4j
@RequiredArgsConstructor
@FieldDefaults(makeFinal=true, level=AccessLevel.PRIVATE)
public class UserService {
  @NonNull UserDao userDao;
}

Açıklaması şöyle

The @FieldDefaults annotation adds the final and private modifiers to all of the fields.