@Entity
@IdClass(KuponPK.class)
@Table(name = "KUPON", schema = "POST", catalog = "")
public class Kupon implements Serializable {

  private Integer id;
  private String spil;
  private Collection<Kombination> kombinationList;

  @OneToMany(mappedBy = "kupon", cascade = CascadeType.PERSIST)
  public Collection<Kombination> getKombinationList() {
    return kombinationList;
  }

  public class KuponPK implements Serializable {

    private Integer id;
    private String spil;

    @Id
    @Column(name = "ID", nullable = false, insertable = true, updatable = true, precision = 0)
    public Integer getId() {
      return id;
    }

    @Id
    @Column(name = "SPIL", nullable = false, insertable = true, updatable = true, length = 5)
    public String getSpil() {
      return spil;
    }

    @Entity
    @Table(name = "KOMBINATION", schema = "POST", catalog = "")
    public class Kombination {
      private Integer id;
      private String sorteringOrden;
      private Integer sorteringNr;
      private Integer antalSpillede;
      private BigDecimal odds;
      private Kupon kupon;

      @ManyToOne
      @JoinColumns({@JoinColumn(name = "KUPON_ID", referencedColumnName = "ID", nullable = false, insertable=false, updatable=false),
              @JoinColumn(name = "KUPON_SPIL", referencedColumnName = "SPIL", nullable = false, insertable=false, updatable=false)})
      public Kupon getKupon() {
        return kupon;
      }