@Entity
@Table(name = "aegis_inventory")
public class Inventory
@Column(name = "item_owner")   
@Id
   private int id;   

@OneToMany(targetEntity=ItemSlot.class, fetch=FetchType.EAGER, mappedBy = "item_owner") //im trying to collect all items user has by using aegis_inventory.item_owner as id
   List<ItemSlot> items = new LinkedList<ItemSlot>();

//this one returns Inventory instead of ItemSlot - and throws ClassCastException   
public ItemSlot getItem(int slot) {
      return items.get(slot);
   }

@Entity
@Table(name = "aegis_inventory")
public class ItemSlot
   @Embedded
   Item item;
   
   @Column(name = "slot")
   int slotNum;
   
   @Id
   private int item_owner;

@XmlAccessorType(XmlAccessType.NONE)
@XmlRootElement(name = "item_templates")
@Embeddable
public class Item implements Serializable
@XmlAttribute(name = "id", required = true)
   @XmlID
   @Transient
   private String id;
   
   @XmlElement(name = "name")
   @Transient
   private String name;
   
   @XmlElement(name = "stack_size")
   @Transient
   private int maxStackSize;
   
   @XmlTransient
   @Column(name = "item_id")
   private int itemId;
   
   @XmlTransient
   @Enumerated(EnumType.ORDINAL)
   @Column(name = "slot_type")
   private ItemSlotType type;