JPA映射接口为EclipseLink中的@Entity [英] JPA mapping Interface as @Entity in EclipseLink

问题描述

我必须将接口映射为实体，以便在集合中使用不同的实现。

I have to map the interface as entity to use different implementations in collections.

@Entity
@Table(name = "OPTION")
@Inheritance(strategy = InheritanceType.SINGLE_TABLE)
@DiscriminatorColumn(name = "TYPE", discriminatorType = DiscriminatorType.STRING)
public interface FilterOption {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    public Long getId();
    public void setId(Long id);
    public Object getValue();
...
}

我收到错误：

内部异常：异常[EclipseLink-7161]（Eclipse持久性
服务 - 2.2.0.v20110202-r8913）：
org.eclipse.persistence.exceptions.ValidationException异常
描述：实体类[class
FilterOption]没有指定主
键。它应该定义@Id，@ EmbeddedId或
@IdClass。

Internal Exception: Exception [EclipseLink-7161] (Eclipse Persistence Services - 2.2.0.v20110202-r8913): org.eclipse.persistence.exceptions.ValidationException Exception Description: Entity class [class FilterOption] has no primary key specified. It should define either an @Id, @EmbeddedId or an @IdClass.

正如你可以看到@Id是声明。如何解决此问题？

As you can see the @Id is declared. How can I fix this problem?

推荐答案

您无法使用带eclipselink的注释将实体映射到接口，显然。

you can't map entities to interfaces using annotations with eclipselink, apparently.

实际上，您无法将实体映射到接口处全部使用 jpa或hibernate 。

In fact, you can't map an entity to an interface at all using jpa or hibernate.

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