Node root = new Node();

Fori 10{
Node n1 = new Node();
root.addNode(n1);

For i 10{
Node n2 = new Node();
n1.addNode(n2);
}
}

  
  @Override
    public Property findPropertyWithTheirPropertes(Long rootId) {
        em.createNamedQuery(Property.findAllPropertes).getResultList();
        Property root = em.find(Property.class, rootId); 
        return root;
    }

@Entity
@XmlRootElement
@XmlAccessorType(XmlAccessType.FIELD)
@NamedQueries({ 
    @NamedQuery(name = Property.findAllPropertes, query = "SELECT p FROM Property p LEFT JOIN fetch p.properties")
 })

public class Property implements Serializable {

    private static final long serialVersionUID = 1L;
    public static final String findAllPropertes = "findAllPropertes";
    
    @Id 
    @GeneratedValue(strategy = GenerationType.AUTO)
    @XmlTransient
    private Long id;
    
    @XmlAttribute
    private String name;

    
    @OneToMany(cascade = CascadeType.ALL, fetch = FetchType.LAZY, orphanRemoval = true)
    @JoinColumn(name = "parent_id")
    @OrderColumn(name = "properties_order")
    @XmlElementRef
    private List<Property> properties = new ArrayList<>();

    public Property() {
    }