Mapping to a child table twice - @OneToMany & @manytoone

Child.java

@Entity
@Table(name = "child")
public class Child {
    @ManyToOne(optional = false)
    private Parent parent;
    @Id
    @Column(name = "id")
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private int id;

    @Deprecated
    protected Child() {
    }

    Child(Parent parent) {
        this.parent = parent;
    }

    public int getId() {
        return id;
    }
}

hibernate.cfg.xml

<?xml version='1.0' encoding='utf-8'?>
        <!DOCTYPE hibernate-configuration PUBLIC
                "-//Hibernate/Hibernate Configuration DTD//EN"
                "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
  <property name="hibernate.dialect">org.hibernate.dialect.PostgreSQL94Dialect</property>
  <property name="connection.driver_class">org.postgresql.Driver</property>
  <property name="connection.username">postgres</property>
  <property name="connection.password">postgres</property>
  <property name="connection.url">jdbc:postgresql://localhost/test</property>
  <property name="hbm2ddl.auto">create</property>
</session-factory>
</hibernate-configuration>

Parent.java

@Entity
@Table(name="parent")
class Parent {
    @Id
    @Column(name = "id")
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private int id;
    @OneToOne(optional = false, cascade = CascadeType.PERSIST)
    @JoinColumn(name = "current_child_id")
    private Child currentChild;
    @OneToMany(mappedBy = "parent")
    private List<Child> childHistory;

    @Deprecated
    protected Parent() {}
    Parent(String test) {
        this.currentChild = new Child(this);
        childHistory = new ArrayList<>();
        childHistory.add(this.currentChild);
    }

    int getId() {
        return id;
    }

    Child getCurrentChild() {
        return currentChild;
    }

    List<Child> getChildHistory() {
        return childHistory;
    }
}

TestApp.java

public class TestApp {
    public static void main(String[] args) throws ClassNotFoundException {
        Class.forName("org.postgresql.Driver");
        final Configuration cfg = new Configuration();
        cfg.configure("hibernate.cfg.xml");
        cfg.addAnnotatedClass(Parent.class);
        cfg.addAnnotatedClass(Child.class);

        try (SessionFactory factory = cfg.buildSessionFactory()) {
            final int parentId = persistParent(factory);

            try (Session session1 = factory.openSession()) {
                Transaction t1 = session1.beginTransaction();
                Parent parent1 = session1.find(Parent.class, parentId);
                Assert.assertEquals(1, parent1.getChildHistory().size());
                Assert.assertEquals(parent1.getChildHistory().get(0).getId(), parent1.getCurrentChild().getId());
                t1.commit();
                session1.close();
            }
        }
    }

    private static int persistParent(SessionFactory factory) {
        int parentId;
        try (Session session = factory.openSession()) {
            final Transaction t = session.beginTransaction();
            final Parent parent = new Parent("123");
            session.persist(parent);
            t.commit();
            session.close();
            parentId = parent.getId();
            System.out.println("p: " + parentId); // Display the string.
        }
        return parentId;
    }
}