@Entity
@Table(name = "USERS")
public final class Registration implements UserDetails, Serializable {

   @Id
   @Column(name = "ID")
   @GeneratedValue(strategy=GenerationType.AUTO)
   private Integer id;

   @NotEmpty
   @Column(name = "USERNAME")
   private String username;
   @NotEmpty
   @Size(min = 4)
   @Column(name = "PASSWORD")
   private String password;
   @Transient
   private String confirmPassword;
   @NotEmpty
   @Email
   @Column(name = "EMAIL")
   private String email;
   @Column(name = "FIRST_NAME")
   private String firstName;
   @Column(name = "LAST_NAME")
   private String lastName;
   @OneToMany(fetch = FetchType.EAGER, targetEntity = EventFeed.class)
    @JoinTable(name = "USER_EVENT_FEEDS", joinColumns = { @JoinColumn(name = "USER_ID") }, inverseJoinColumns = { @JoinColumn(name = "EVENT_FEED_ID") })
   private Set<EventFeed> userEventFeeds = new HashSet<EventFeed>(0);
   @OneToMany(fetch = FetchType.EAGER, targetEntity = Role.class)
    @JoinTable(name = "USER_ROLES", joinColumns = { @JoinColumn(name = "USER_ID") }, inverseJoinColumns = { @JoinColumn(name = "ROLE_ID") })
   private Set<Role> userRoles = new HashSet<Role>(0);