Hibernate使用注释@Embeddable和注释@DiscriminatorColumn

Question

我有一个sql表，如下所示。

  id       type_communicationChannel     id_phone       id_cellphone  
+----+--------------------------------+-------------+----------------+
| 1  | "PHONE"                        | 1           | NULL           |
| 2  | "CELLPHONE"                    | NULL        | 1              |
+----+--------------------------------+-------------+----------------+

对于实现，我有两种对Java对象建模的解决方案：

第一个解决方案使用注解@AttributesOverrides：

@Entity
public class Parent {
    private @Id @GeneratedValue int id;

    @Embedded
    @AttributeOverrides({
    @AttributeOverride(name="id",column=@Column(name="id_phone")})
    private CommunicationChannel phone;

    @Embedded
    @AttributeOverrides({
    @AttributeOverride(name="id",column=@Column(name="id_cellphone")})
    private CommunicationChannel cellphone;

    private String type_communicationChannel;
}

@Embeddable
public class CommunicationChannel {
   private int id;
}

第二种解决方案使用注释@DiscriminatorColumn：

@Entity
public class Parent {
   private @Id @GeneratedValue int id;

  @Embedded
  private CommunicationChannel communicationChannel;
}

@Embeddable
@DiscriminatorColumn(
 name="type_communicationChannel",
 discriminatorType=DiscriminatorType.STRING
)
public abstract class CommunicationChannel {}

@DiscriminatorValue("CELLPHONE")
public class CellPhone extends CommunicationChannel {
  private int id_cellphone;
}

@DiscriminatorValue("PHONE")
public class PhoneFix extends CommunicationChannel {
 private int id_phone;
}

最合适的解决方案是什么？

感谢您的回答。