Hibernate：双向@OneToOne关系

Question

尝试在两个具有两个外键的实体之间创建OneToOne关系时遇到问题。

public class Player {  
    @JoinColumn(name = "player_state")
    @OneToOne(fetch = FetchType.EAGER ,cascade = {CascadeType.PERSIST,    CascadeType.MERGE})
    private PlayerState playerState;

}

public class PlayerState {
    @OneToOne(mappedBy="playerState")
    private Player player;
}

当我表演时：

Player player = new Player();
PlayerState state = new PlayerState();
state.setPlayer(player)
Player.setPlayerState(state);

DAO.persist(player);

播放器是持久的，在player_state上引用了PlayerState。 PlayerState保持不变。

从PlayerState到Player的引用为空。

我无法将PlayerState的引用作为引用播放器的ID。

任何想法？。