@MappedSuperclass
@Embeddable
public class Person {
  private String name;
  private Date dateOfBirth;
  ...
  @Column(name = "NAME")
  public String getName() {
    return name;
  }
  @Column(name = "BIRTH")
  public Date getDateOfBirth() {
    return dateOfBirth;
  }
  ...
}

@Entity
public class Actor {
  private Person person;
  ...
  @Embedded
  // I need to turn dateOfBirth transient
  public Person getPerson() {
    return person;
  }
  ...
}

@Entity
@Table("DIRECTOR")
// I need to turn dateOfBirth transient
public class Director extends Person {
  ...
}