Blah.java

@Entity
public class A {
  @Id @GeneratedValue(strategy=SEQUENCE)
  public Integer getId() { return id; }
  public void setId(Integer id) { this.id = id; }
  private Integer id;

  public String getName() { return name; }
  private void setName(String name) { this.name = name; }
  private String name;
}

Serializable id = em.unwrap(Session.class).save(a);
a.setName("Why oh why redundancy? " + id);
em.flush();