问如何在ne4j-ogm或spring-data-new4j中动态更改实体类型？

EN

@NodeEntity
public class Artist {}

@NodeEntity
public class Band extends Artist{}

interface ArtistRepository<T extends Artist> extends Repository<T, Long>, ArtistRepositoryExt {

    Optional<T> findOneByName(String name);

    // Specifying the relationships is necessary here because the generic queries won't recognize that
    // Band has a relationship to country that _should_ be loaded with default depth of 1.

    @Query("MATCH (n:Artist) WITH n MATCH p=(n)-[*0..1]-(m) RETURN p ORDER BY n.name")
    List<T> findAllOrderedByName();

    @Query("MATCH (n:Artist) WHERE id(n) = $id WITH n MATCH p=(n)-[*0..1]-(m) RETURN p")
    Optional<T> findById(@Param("id") Long id);

    <S extends T> S save(S artist);
}

interface ArtistRepositoryExt {
    Band markAsBand(Artist artist);

    SoloArtist markAsSoloArtist(Artist artist);
}

class ArtistRepositoryExtImpl implements ArtistRepositoryExt {

    private static final String CYPHER_MARK_AS_BAND = String.format(
        "MATCH (n) WHERE id(n) = $id\n" +
            "OPTIONAL MATCH (n) - [f:BORN_IN] -> (:Country)\n" +
            "REMOVE n:%s SET n:%s\n" +
            "DELETE f",
        SoloArtist.class.getSimpleName(),
        Band.class.getSimpleName());
    private static final String CYPHER_MARK_AS_SOLO_ARTIST = String.format(
        "MATCH (n) WHERE id(n) = $id\n" +
            "OPTIONAL MATCH (n) - [f:FOUNDED_IN] -> (:Country)\n" +
            "REMOVE n:%s SET n:%s\n" +
            "DELETE f",
        Band.class.getSimpleName(),
        SoloArtist.class.getSimpleName());

    private final Session session;

    public ArtistRepositoryExtImpl(Session session) {
        this.session = session;
    }

    @Override
    public Band markAsBand(Artist artist) {
        session.query(CYPHER_MARK_AS_BAND, Map.of("id", artist.getId()));
        // Needs to clear the mapping context at this point because this shared session
        // will know the node only as class Artist in this transaction otherwise.
        session.clear();
        return session.load(Band.class, artist.getId());
    }

    @Override
    public SoloArtist markAsSoloArtist(Artist artist) {
        session.query(CYPHER_MARK_AS_SOLO_ARTIST, Map.of("id", artist.getId()));
        // See above
        session.clear();
        return session.load(SoloArtist.class, artist.getId());
    }
}