Java 基于接口的投影、原生查询和枚举

在升级到Hibernate6和Spring Boot3之后，下面的代码抛出了一个错误(Cannot project java.lang.Short to com.cubetrek.cubetrekplayground.database.TrackData$Sharing; Target type is not an interface and no matching Converter found).

@Entity类如下所示:

@Entity(name = "trackdata")
@Table(name = "trackdata")
public class TrackData implements Serializable {

    public enum Sharing {
        PRIVATE, FRIENDS, PUBLIC;
    }

    @Getter
    @Setter
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;

    @Getter
    @Setter
    @Column(name = "title")
    private String title;

    @Getter
    @Setter
    @Enumerated(EnumType.ORDINAL)
    @Column(name = "sharing")
    private Sharing sharing;
    
    // loads of other fields and getters and setters...

    //and here's the interface
    
    public interface TrackMetadata {
        Long getId();
        @JsonSerialize(using = TitleSerializer.class, as=String.class)
        String getTitle();

        @Enumerated(EnumType.ORDINAL)
        Sharing getSharing();
    }
}

在TrackDataRepository中:

public interface TrackDataRepository extends JpaRepository<TrackData, Long>, JpaSpecificationExecutor<TrackData> {
    Optional<TrackData> findById(Long id);
    
    // and here's the query in question:
    @Query(value = "SELECT trackdata.id, trackdata.title, trackdata.sharing FROM trackdata " +
            "WHERE trackdata.id = :trackid", nativeQuery = true)
    TrackData.TrackMetadata getMetadata(long trackid);
}

实体的工作方式与预期一致:

    TrackData trackData = trackDataRepository.getReferenceById(21682L);
    System.out.println(trackData.getSharing()); //works fine

但界面却搞砸了:

TrackData.TrackMetadata td2 = trackDataRepository.getMetadata(21682L);
System.out.println(td2.getTitle()); //works
System.out.println(td2.getSharing()); //ERROR!!

错误似乎是因为从short到enum的投影:

100

此外，定制的Converter似乎不能完成此任务:

    @Converter
    public static class SharingConverter implements AttributeConverter<Sharing, Short> {
        @Override
        public Short convertToDatabaseColumn(Sharing sharing) {
            return (short)sharing.ordinal();
        }

        @Override
        public Sharing convertToEntityAttribute(Short dbData) {
            return Sharing.values()[dbData];
        }
    }

    public interface TrackMetadata {
        Long getId();
        @JsonSerialize(using = TitleSerializer.class, as=String.class)
        String getTitle();

        @Convert(converter = SharingConverter.class)
        Sharing getSharing();
    }