Accessing application property in Spring boot application from MapStruct mapper

Question

I want to access basic-info.expiration from application.yml a Spring boot application.

application.yml

basic-info:
  expiration: 6

UserMapper.java

@Mapper(componentModel = "spring")
public interface UserMapper {

  @Value("${basic-info.expiration}")
  static long expireInMonths = 0;
  // ^^^^^^^^^^^^^^^^^^^^^^^^^^^

  @Mapping(target = "requireBasicInfoUpdate", source = "user", qualifiedByName = "isBasicInfoUpdateRequired")
  UserDto toUserDto(User user);

  @Named("isBasicInfoUpdateRequired")
  default Boolean isBasicInfoUpdateRequired(User user) {
    final var expireDate = LocalDate.now().minusMonths(expireInMonths);
    final var lastUpdatedOn = user.getBasicInfoUpdatedDate().toInstant().atZone(ZoneId.systemDefault()).toLocalDate();

    return expireDate.isAfter(lastUpdatedOn);
  }
}

How to inject property value with MapStruct

Answer 1

As @M. Deinum suggested, interface was changed to an abstract class. This is the most preferred method since application need no refactoring.

@Mapper(componentModel = "spring")
public abstract class UserMapper {
  @Value("${basic-info.expiration}")
  long expireInMonths = 0;

  @Mapping(target = "requireBasicInfoUpdate", source = "user", qualifiedByName = "isBasicInfoUpdateRequired")
  public abstract UserDto toUserDto(User user);

  @Named("isBasicInfoUpdateRequired")
  public Boolean isBasicInfoUpdateRequired(User user) {
    final var expireDate = LocalDate.now().minusMonths(expireInMonths);
    final var lastUpdatedOn = user.getBasicInfoUpdatedDate().toInstant().atZone(ZoneId.systemDefault()).toLocalDate();

    return expireDate.isAfter(lastUpdatedOn);
  }
}