@Entity
@Table(name="DATA")
public class Data implements java.io.Serializable {

   @Id     
   @GeneratedValue(strategy = GenerationType.AUTO)
   private long id;

       ......   

   @OneToOne (cascade = CascadeType.ALL, fetch = FetchType.LAZY)
   @PrimaryKeyJoinColumn (name = "data_id")
        private Score score = null;

   @OneToMany (targetEntity = TextData.class, mappedBy = "Data", cascade = CascadeType.ALL, fetch = FetchType.LAZY)
   private Set<TextData> schufaTextData = new HashSet<TextData>(0);
   
.....

@Entity
@Table(name="SCORE")
public class Score  implements java.io.Serializable {

    @GeneratedValue(strategy = GenerationType.AUTO)
    private long id;
   @Column(name="attribute_code")
    private String attributeCode;
   @Column(name="description")
    private String description;
   @Column(name="score_value")
    private int scoreValue;
   @Column(name="risk_rate")
    private float riskRate;
   @Column(name="score_range")
    private String scoreRange;
   @Column(name="text")
    private String text;
   @OneToOne (targetEntity = SchufaData.class)
    @JoinColumn (name = "data_id")
    private Data data;

....

   @SuppressWarnings("unchecked")
   public List<Data> findDataByIpNbrLess24h(String ipNbr) {
      final String finalIpNbr = ipNbr;
      return (List<Data>)getHibernateTemplate().execute(new HibernateCallback() {
         public Object doInHibernate(Session session) {
            Calendar critDateTime = Calendar.getInstance();
            critDateTime.set(Calendar.DATE, critDateTime.get(Calendar.DATE)-1);

            Criteria criteria = session.createCriteria(Data.class);
            criteria.add(Restrictions.and(Restrictions.eq("ipNbr", finalIpNbr),
                      Restrictions.gt("insertDate", critDateTime.getTime())));
            criteria.setFetchMode("score", FetchMode.JOIN);
            criteria.setFetchMode("textData", FetchMode.JOIN);
            return criteria.list();
         }
         });
   }