@Entity
@Table(name="PERSON")
@NamedQueries({
    @NamedQuery(name="person.lazyLoadAddresses",
                query="SELECT a FROM Address a JOIN a.person p WHERE p.id LIKE :id")
    @NamedQuery(name="person.lazyLoadContacts",
                query="SELECT contacts FROM Person contacts JOIN contacts.persons AS p WHERE p.id LIKE :id")
})

public class Person implements Serializable {
   
    private static final long serialVersionUID = 1L;
    private Long id;
    private String name;
    private Collection<Address> addresses;
    /* ManyToMany relation attributes */
    private Collection<Person> contacts;
    private Collection<Person> persons;
   
    public Person(){  }
   
   
    public Person(String name){
        this.name= name;
    }
   
    /********************************/
   
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    public Long getId() {
        return id;
    }
   
    public void setId(Long id) {
        this.id = id;       
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;       
    }
   
    @OneToMany(mappedBy="person")
    public Collection<Address> getAddresses() {
        return this.addresses;
    }

    public void setAddresses(Collection<Address> addresses) {
        this.addresses = addresses;
    }
   
    @ManyToMany
    @JoinTable(
        name="PERSON_CONTACT",
        joinColumns=@JoinColumn(name="ID_PERSON", referencedColumnName="ID"),
        inverseJoinColumns=@JoinColumn(name="ID_CONTACT", referencedColumnName="ID")
    )
    public Collection<Person> getContacts(){
        return this.contacts;
    }
   
    public void setContacts(Collection contacts){
        this.contacts= contacts;
    }
   
    @ManyToMany(mappedBy="contacts")
    public Collection<Person> getPersons(){
        return this.persons;
    }
   
    public void setPersons(Collection<Person> persons){
        this.persons= persons;
    } 
}