2009-08-03 14:49:25,871 INFO  [STDOUT] (http-127.0.0.1-8080-6) Hibernate: insert into AdtSessionModule (editDate, hwTypeId, manufacturerId, moduleId, adtSessionId, parentAdtSessionModuleId, serial, fwTypeId, fwVerId, hwVerId, oldFwTypeId, oldFwVerId, AdtSessionModuleTypeID, adtSessionModuleId) values (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, 'module', ?)
2009-08-03 14:49:25,872 INFO  [org.hibernate.type.StringType] (http-127.0.0.1-8080-6) could not bind value '0618000377635b31' to parameter: 14; Invalid column index
2009-08-03 14:49:25,872 WARN  [org.hibernate.util.JDBCExceptionReporter] (http-127.0.0.1-8080-6) SQL Error: 17003, SQLState: null
2009-08-03 14:49:25,872 ERROR [org.hibernate.util.JDBCExceptionReporter] (http-127.0.0.1-8080-6) Invalid column index

@Entity
@Table(name = "AdtSessionModule")
@Inheritance(strategy = InheritanceType.SINGLE_TABLE)
@DiscriminatorColumn(name = "AdtSessionModuleTypeID",
    discriminatorType = DiscriminatorType.STRING)
@IdClass(AdtSessionModulePk.class)
//Due to a bug in jdk 1.4+, Entities, which have a POJO ID class, cannot implement serializable.
public class AdtSessionModule //implements Serializable
{
  protected AdtSessionModule() {
  }

  public enum Types {
    METER("meter"),
    MODULE("module");
    String name;
    private Types(String name){
      this.name=name;
    }
    public String toString() {return name;}
  }

  /**
   * The session in which this module was discovered.
   */
  @ManyToOne
  @JoinColumn(name = "adtSessionId", updatable = false, insertable = false)
  private AdtSession session;

  @Version
  @Temporal(TemporalType.TIMESTAMP)
  private Date editDate;

  @Id
  @Column(name="adtSessionModuleId",  updatable = false, insertable = false)
  private String adtSessionModuleId;
  @Id
  @Column(name="adtSessionId",  updatable = false, insertable = false)
  private long adtSessionId;

  @OneToMany(mappedBy = "parentModule", cascade = { CascadeType.PERSIST, CascadeType.MERGE, CascadeType.REFRESH })
//  @Transient
  private Set<AdtSessionModule> children = new LinkedHashSet<AdtSessionModule>();

  /**
   * This module as it is discovered by the system. Null if the system has not
   * discovered this module.
   */
  @ManyToOne
  @JoinColumn(name = "moduleId")
  private Module module;

  /**
   * The parent module. Null, if root module.
   */
  @ManyToOne(cascade = {CascadeType.ALL})
  @JoinColumns( {
      @JoinColumn(name = "parentAdtSessionModuleId", referencedColumnName = "adtSessionModuleId"),
      @JoinColumn(name = "adtSessionId", referencedColumnName = "adtSessionId")})
//  @Transient
  private AdtSessionModule parentModule;

  private String serial;

  @ManyToOne
  @JoinColumn(name = "hwTypeId")
  private HWType hardwareType;

  @ManyToOne
  @JoinColumn(name = "manufacturerId")
  private Manufacturer manufacturer;

  @OneToMany(mappedBy="module", cascade = {CascadeType.ALL})
  private Set<AdtResourceCheck> resourceChecks = new LinkedHashSet<AdtResourceCheck>();


  //Not updatable nor insertable, since this is used as a discriminator
  @Column(name="AdtSessionModuleTypeID", insertable=false, updatable=false)
  private String type;
... methods follow ...
}

  private AdtSessionModule newSessionModule(AdtSession dbSession, AdtSessionModule module) {
    AdtSessionModule adtSessionModule;

    AdtSessionModuleAms ams = (AdtSessionModuleAms)module;
    AdtSessionModuleAms amsModule = new AdtSessionModuleAms(dbSession, module.getAdtSessionModuleId());
    amsModule.setFirmwareType(ams.getFirmwareType());
    amsModule.setFirmwareVersion(ams.getFirmwareVersion());
    amsModule.setHardwareVersion(ams.getHardwareVersion());
    adtSessionModule = amsModule;

    adtSessionModule.setManufacturer(module.getManufacturer());
    adtSessionModule.setHardwareType(module.getHardwareType());
    adtSessionModule.setSerial(module.getSerial());
    adtSessionModule.setModule(module.getModule());
    em.persist(adtSessionModule);
    em.flush();

    for (AdtSessionModule child : module.getChildren()) {
      AdtSessionModule newModule = newSessionModule(dbSession, child);
      adtSessionModule.addChild(newModule);
    }

    return adtSessionModule;
  }