@NodeEntity
@Getter
@Setter
@NoArgsConstructor
public class ProductRecommendation {
    @GraphId
    private Long id;

    String product;
    @Relationship(type = "RECOMMENDS", direction = Relationship.OUTGOING)
    Set<ProductRecommendation> linkedProducts = new HashSet<>();
}

public interface ProductRecommendationRepository extends GraphRepository<ProductRecommendation> {
    @Query("MATCH p=()-[r:RECOMMENDS]->() RETURN p")
    List<ProductRecommendation> findByRelationShipType();
}

public interface ProductRecommendationRepository extends GraphRepository<ProductRecommendation> {
    @Query("MATCH p=()-[r:{0}]->() RETURN p")
    List<ProductRecommendation> findByRelationShipType(String type);
}