@Entity
@Table(name="table_1")
@Inheritance(strategy=InheritanceType.JOINED)
@IdClass(MyPK.class)

public class MySuperClazz implements Serializable
{
  @Id
  @Column(name = "id")
  @GenericGenerator(
      name = "IdSeq",
      strategy = "com.company.hibernate.VarcharSequenceGenerator",
      parameters = { @Parameter(name = "sequence", value = "TABLE1_SEQ") })
  @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "IdSeq")
  private String id;

  @Id
  @Column(name = "type")
  private String type;
 
  .....
}

public class MyPK implements Serializable
{
   private static final long serialVersionUID = 1L;

   private String id; 
   private String type;
   
   public MyPK() {}

   public MyPK(String type, String id)
   {
     this.type = type;
     this.id = id;
    }

   public int hashCode() { ....  }
   public boolean equals(Object obj)  { .... }
}

@Entity
@Table(name="table_2")
@PrimaryKeyJoinColumns(
    {
   @PrimaryKeyJoinColumn(name="id"),
   @PrimaryKeyJoinColumn(name="type")
    })
public class MySubClazz extends MySuperClazz
{
  public MySubClazz()
  { super(); }

   .....
}

@Entity
@Table(name="information")
@IdClass(InformationPK.class)
public class Information implements  Serializable
{
   @Id
   @Column(name = "information_id")
   @GenericGenerator(
      name = "IdSeq",
      strategy = "com.company.hibernate.VarcharSequenceGenerator",
      parameters = { @Parameter(name = "sequence", value = "INFORMATION_SEQ") })
   @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "IdSeq")
   private String informationId;
   
   @Id
   @Column(name = "info_type")
   private String infoType;
   
   @ManyToMany
   @JoinTable(name = "info_item_content",
      joinColumns =
      {
              @JoinColumn(name="information_id", referencedColumnName="information_id"),
         @JoinColumn(name="info_type", referencedColumnName="info_type")
      },
      inverseJoinColumns =
      {
              @JoinColumn(name="id", referencedColumnName="id"),
         @JoinColumn(name="type", referencedColumnName="type")
     })
  private Set<MySuperClazz> superClazz;

  ........
}

session.createCriteria(Information.class)
           .setFetchMode("superClazz", FetchMode.JOIN)
           .add(Restrictions.eq("informationId", "123456"))
           .list();