Hibernate试图将继承类对象放入他的兄弟元素中

Question

标题听起来很蹩脚和混淆，但问题出在这里：

我有一个名为 Price 的实体，它有两个名为＆＃34; status ＆＃34;和＆＃34; approvalStatus ＆＃34;。这些元素分别来自 Status 和 ApprovalStatus 类。后两者都扩展了 Domain 类，它映射了一个多域表。

在我的jUnit中，当我调用 Status 列表或 ApprovalStatus 列表时，hibernate带来了没问题。但是当我打电话给我的Price实体时，我遇到了以下问题：

javax.persistence.PersistenceException: org.hibernate.WrongClassException: Object with id: 1 was not of the specified subclass: net.x.ApprovalStatus (loaded object was of wrong class class net.x.Status)] with root cause
org.hibernate.WrongClassException: Object with id: 1 was not of the specified subclass: net.x.ApprovalStatus (loaded object was of wrong class class net.x.Status)

作为测试，我删除了＆＃34; 状态＆＃34;我的价格实体中的元素。它工作了！当我有多个类继承自同一个实体的元素时，会弹出这个问题。

这是我的课程（手动剥离，太大了：/）

@Entity
@Inheritance(strategy=InheritanceType.SINGLE_TABLE)
@DiscriminatorColumn(name="CD_DOMAIN_GROUP", discriminatorType=DiscriminatorType.INTEGER)
@Table(name="DOMAIN")
@Cacheable
public abstract class Domain {
    @Id
    @Column(name="CD_DOMAIN")
    private Integer code;

    public Domain () {

    }

    public Domain (Integer code) {
        this.code = code;
    }

    public Integer getCode() {
        return code;
    }

    public void setCode(Integer code) {
        this.code= code;
    }
}


@Entity
@DiscriminatorValue("1")
@Cacheable
public class Status extends Domain implements Serializable {
    private static final long serialVersionUID = 1L;

    public static Integer ACTIVE= 1;
    public static Integer INATIVE = 2;

    public Status() {

    }

    public Status(Integer code) {
        super(code);
    }
}


@Entity
@DiscriminatorValue("2")
@Cacheable
public class ApprovalStatus extends Domain implements Serializable {
    private static final long serialVersionUID = 1L;

    public static Integer APPROVED = 1;
    public static Integer REJECTED = 2;
    public static Integer PENDING = 3;

    public ApprovalStatus () {

    }

    public ApprovalStatus (Integer code) {
        super(code);
    }
}


@Entity
@Table(name="PRICE")
public class Price  {
    @Id
    @Column(name="CD_PRICE")
    private Integer code;

    @ManyToOne(fetch=FetchType.LAZY)
    @JoinColumn(name="ID_STATUS", referencedColumnName="CD_DOMAIN")
    private Status status;

    @ManyToOne(fetch=FetchType.LAZY)
    @JoinColumn(name="ID_APPROVAL_STATUS", referencedColumnName="CD_DOMAIN")
    private ApprovalStatus approvalStatus;
}

有谁知道发生了什么事？我错过了一些配置吗？我的地图有点不对劲吗？

我正在使用hibernate 4.2.13.Final。