如果实体父级中任何布尔属性的条件为true，则填充映射属性（休眠）

Question

我有三个实体：

@Entity
Class Parent{
    //This id can be belong to two references
    @Basic
    @Column(name="reference_id")
    @getter @setter private Integer referenceId;
    //This variable control the source where the Id is belong
    @Basic
    @Column(name="reference_a")
    @getter @setter private boolean referenceA

    @ManyToOne
    //If referenceA == true, fill sourceA
    @getter @setter private ReferenceA sourceA;

   @ManyToOne
   //if referenceB== false, fill sourceB
   @getter @setter private ReferenceB sourceB;

}

@Entity
//Here, doesn't exist the reference to the parent Entity
public class ReferenceA{
   @getter @setter private Id;
}

@Entity
//Here either exists the reference to the parent Entity
public class ReferenceB{
   @getter @setter private Id;
}

问题在于，如果在父级中referenceA为true，则需要获取Object sourceA；如果referenceA为false，则需要获取sourceB。

我尝试使用@Where和Filter，但同时过滤了SourceA或SourceB端。

有什么建议吗？