<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
                                   "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="db.kinder">
<class name="Kinder" table="kinder">
  <id column="id" name="id">
   <generator class="native"/>
  </id>
  <property column="vorname" generated="never" lazy="false" name="vorname"/>
  <property column="nachname" generated="never" lazy="false" name="nachname"/>
  <property column="gruppe" generated="never" lazy="false" name="gruppe"
   not-null="true" type="integer"/>
  <property column="klasse" generated="never" lazy="false" name="klasse"/>
  <property column="schule" generated="never" lazy="false" name="schule"/>
  <one-to-one cascade="all" class="Heimweg" constrained="true" name="heimweg"/>
  <one-to-one cascade="all" class="Hgz" constrained="true" name="hgz"/>
  <one-to-one cascade="all" class="Sonstiges" constrained="true" name="sonstiges"/>
  <one-to-one cascade="all" class="Ue" constrained="true" name="ue"/>
</class>
<class name="Heimweg" table="kinder_heimweg">
  <id column="id" name="id">
   <generator class="foreign">
    <param name="property">kinder</param>
   </generator>
  </id>
  <property column="Mon" generated="never" lazy="false" name="Mon" type="boolean"/>
  <property column="Tue" generated="never" lazy="false" name="Tue" type="boolean"/>
  <property column="Wed" generated="never" lazy="false" name="Wed" type="boolean"/>
  <property column="Thu" generated="never" lazy="false" name="Thu" type="boolean"/>
  <property column="Fri" generated="never" lazy="false" name="Fri" type="boolean"/>
  <one-to-one cascade="all" class="Kinder" name="kinder"/>
</class>
<class name="Hgz" table="kinder_hgz">
  <id column="id" name="id">
   <generator class="foreign">
    <param name="property">kinder</param>
   </generator>
  </id>
  <property column="Mon" generated="never" lazy="false" name="mon" type="time"/>
  <property column="Tue" generated="never" lazy="false" name="tue" type="time"/>
  <property column="Wed" generated="never" lazy="false" name="wed" type="time"/>
  <property column="Thu" generated="never" lazy="false" name="thu" type="time"/>
  <property column="Fri" generated="never" lazy="false" name="fri" type="time"/>
  <one-to-one cascade="all" class="Kinder" name="kinder"/>
</class>
<class name="Sonstiges" table="kinder_sonstiges">
  <id column="id" name="id">
   <generator class="foreign">
    <param name="property">kinder</param>
   </generator>
  </id>
  <property column="allergien" generated="never" lazy="false" name="allergien"/>
  <property column="abholberechtigte" generated="never" lazy="false" name="abholberechtigte"/>
  <property column="baecker" generated="never" lazy="false"
   name="baecker" type="boolean"/>
  <property column="buecherei" generated="never" lazy="false"
   name="buecherei" type="boolean"/>
  <property column="fleisch" generated="never" lazy="false"
   name="fleisch" type="boolean"/>
  <property column="kommentare" generated="never" lazy="false" name="kommentare"/>
  <one-to-one cascade="all" class="Kinder" name="kinder"/>
</class>
<class name="Ue" table="kinder_ue">
  <id column="id" name="id">
   <generator class="foreign">
    <param name="property">kinder</param>
   </generator>
  </id>
  <property column="ue_mo" generated="never" lazy="false" name="mon" type="time"/>
  <property column="ue_di" generated="never" lazy="false" name="tue" type="time"/>
  <property column="ue_mi" generated="never" lazy="false" name="wed" type="time"/>
  <property column="ue_do" generated="never" lazy="false" name="thu" type="time"/>
  <property column="ue_fr" generated="never" lazy="false" name="fri" type="time"/>
  <one-to-one cascade="all" class="Kinder" name="kinder"/>
</class>
</hibernate-mapping>

package db.kinder;

import javax.persistence.*;

/**
*
* @author muki Diese Klasse repräsentiert die Tabelle hort.kinder
*
*/
@Entity
@Table(name = "kinder")
public class Kinder {

   @Id
   @GeneratedValue
   @Column(name = "id")
   private Integer id;

   @Column(name = "vorname")
   private String vorname;

   @Column(name = "nachname")
   private String nachname;

   @Column(name = "gruppe")
   private Integer gruppe;

   @Column(name = "klasse")
   private String klasse;

   @Column(name = "schule")
   private String schule;

   private Heimweg heimweg;
   private Hgz hgz;
   private Nachmittag nachmittag;
   private Sonstiges sonstiges;
   private Ue ue;

   public Kinder() {
   }

   public Kinder(Integer id, String vorname, String nachname, Integer gruppe,
         String klasse, String schule, Heimweg heimweg, Hgz hgz,
         Nachmittag nachmittag, Sonstiges sonstiges, Ue ue) {
      this.id = id;
      this.vorname = vorname;
      this.nachname = nachname;
      this.gruppe = gruppe;
      this.klasse = klasse;
      this.schule = schule;
      this.heimweg = heimweg;
      this.hgz = hgz;
      this.nachmittag = nachmittag;
      this.sonstiges = sonstiges;
      this.ue = ue;

   }

   public Integer getId() {
      return id;
   }

   public void setId(Integer id) {
      this.id = id;
   }

   public String getVorname() {
      return vorname;
   }

   public void setVorname(String vorname) {
      this.vorname = vorname;
   }

   public String getNachname() {
      return nachname;
   }

   public void setNachname(String nachname) {
      this.nachname = nachname;
   }

   public Integer getGruppe() {
      return gruppe;
   }

   public void setGruppe(Integer gruppe) {
      this.gruppe = gruppe;
   }

   public String getKlasse() {
      return klasse;
   }

   public void setKlasse(String klasse) {
      this.klasse = klasse;
   }

   public String getSchule() {
      return schule;
   }

   public void setSchule(String schule) {
      this.schule = schule;
   }

   public Heimweg getHeimweg() {
      return heimweg;
   }

   public void setHeimweg(Heimweg heimweg) {
      this.heimweg = heimweg;
   }

   public Hgz getHgz() {
      return hgz;
   }

   public void setHgz(Hgz hgz) {
      this.hgz = hgz;
   }

   public Nachmittag getNachmittag() {
      return nachmittag;
   }

   public void setNachmittag(Nachmittag nachmittag) {
      this.nachmittag = nachmittag;
   }

   public Sonstiges getSonstiges() {
      return sonstiges;
   }

   public void setSonstiges(Sonstiges sonstiges) {
      this.sonstiges = sonstiges;
   }

   public Ue getUe() {
      return ue;
   }

   public void setUe(Ue ue) {
      this.ue = ue;
   }
}

package db.kinder;

import java.util.Date;
import javax.persistence.*;

@Entity
@Table(name = "kinder_ue")
public class Ue {
   
   public Ue() {}
   
   public Ue(Integer id,
           Date mon,
           Date tue,
           Date wed,
           Date thu,
           Date fri,
           Kinder kinder)
   {
      this.id = id;
      this.mon = mon;
      this.tue = tue;
      this.wed = wed;
      this.thu = thu;
      this.fri = fri;
      this.kinder = kinder;
   }
   
   @Id @GeneratedValue
   @Column(name = "id")
   private Integer id;
   
   @Column(name = "ue_mo")
   private Date mon;
   
   @Column(name = "ue_di")
   private Date tue;
   
   @Column(name = "ue_mi")
   private Date wed;
   
   @Column(name = "ue_do")
   private Date thu;
   
   @Column(name = "ue_fr")
   private Date fri;
   
   private Kinder kinder;

   public Integer getId() {
      return id;
   }

   public void setId(Integer id) {
      this.id = id;
   }

   public Date getMon() {
      return mon;
   }

   public void setMon(Date mon) {
      this.mon = mon;
   }

   public Date getTue() {
      return tue;
   }

   public void setTue(Date tue) {
      this.tue = tue;
   }

   public Date getWed() {
      return wed;
   }

   public void setWed(Date wed) {
      this.wed = wed;
   }

   public Date getThu() {
      return thu;
   }

   public void setThu(Date thu) {
      this.thu = thu;
   }

   public Date getFri() {
      return fri;
   }

   public void setFri(Date fri) {
      this.fri = fri;
   }

   public Kinder getKinder() {
      return kinder;
   }

   public void setKinder(Kinder kinder) {
      this.kinder = kinder;
   }

   
}

            aKind       = new Kinder();
            sonstiges    = new Sonstiges();
            ue          = new Ue();
            hgz       = new Hgz();
            heimweg      = new Heimweg();

/** setzen der Werte, funktioniert auch **/

         aKind.setSonstiges(sonstiges);
         aKind.setUe(ue);
         aKind.setHgz(hgz);
         aKind.setHeimweg(heimweg);
session.save(aKind);

Exception in thread "AWT-EventQueue-0" org.hibernate.id.IdentifierGenerationException: attempted to assign id from null one-to-one property: kinder
   at org.hibernate.id.ForeignGenerator.generate(ForeignGenerator.java:68)

--
-- Tabellenstruktur für Tabelle `kinder`
--

CREATE TABLE IF NOT EXISTS `kinder` (
  `id` int(11) NOT NULL auto_increment,
  `vorname` varchar(20) NOT NULL default '',
  `nachname` varchar(40) NOT NULL default '',
  `gruppe` int(2) NOT NULL default '0',
  `klasse` char(2) default NULL,
  `schule` varchar(6) default NULL,
  PRIMARY KEY  (`id`)
) ENGINE=INNODB DEFAULT CHARSET=latin1 AUTO_INCREMENT=1 ;

--
-- Daten für Tabelle `kinder`
--

--
-- Tabellenstruktur für Tabelle `kinder_ue`
--

CREATE TABLE IF NOT EXISTS `kinder_ue` (
  `id` int(11),
  `ue_mo` time default '00:00:00',
  `ue_di` time default '00:00:00',
  `ue_mi` time default '00:00:00',
  `ue_do` time default '00:00:00',
  `ue_fr` time default '00:00:00',
  UNIQUE(id),
  FOREIGN KEY (id) REFERENCES kinder(id)
  ON DELETE CASCADE
) ENGINE=INNODB DEFAULT CHARSET=latin1;

--
-- Daten für Tabelle `kinder_ue`
--