Foreign Key to a Compsite Primary Key in Hibernate

file.java

/**
  *http://docs.jboss.org/hibernate/annotations/3.5/reference/en/html_single/#d0e2177
  */
@Entity
public class Parent implements Serializable {
    @Id
    public ParentPk id;
    public int age;

    @OneToMany(cascade=CascadeType.ALL)
    @JoinColumns ({
        @JoinColumn(name="parentCivility", referencedColumnName = "isMale"),
        @JoinColumn(name="parentLastName", referencedColumnName = "lastName"),
        @JoinColumn(name="parentFirstName", referencedColumnName = "firstName")
    })
    public Set<Child> children; //unidirectional
    ...
} 
@Entity
public class Child implements Serializable {
    @Id @GeneratedValue
    public Integer id;

    @ManyToOne
    @JoinColumns ({
        @JoinColumn(name="parentCivility", referencedColumnName = "isMale"),
        @JoinColumn(name="parentLastName", referencedColumnName = "lastName"),
        @JoinColumn(name="parentFirstName", referencedColumnName = "firstName")
    })
    public Parent parent; //unidirectional
}       
@Embeddable
public class ParentPk implements Serializable {
    String firstName;
    String lastName;
    ...
}