java – JPA @Entity继承

基本上我希望能够根据需要定义一个包含所有列和表映射的@Entity.然后,我希望能够使用在每个“子实体”的主体中定义的不同@Transient方法集在多个不同位置扩展@Entity.这是我想要实现的基本示例,但到目前为止没有成功：

@Entity
@Table(name = "mountain")
public class MountainEntityBase implements Serializable {
    public Integer mountainId = 0;
    public Integer height = 0;

    public List<ExplorerEntityBase> explorers = new ArrayList<ExplorerEntityBase>();

    @Id
    @GeneratedValue
    @Column(name = "mountain_id")
    public Integer getMountainId() { return mountainId; }
    public void setMountainId(Integer mountainId) { this.mountainId = mountainId; }

    @Column(name="height")
    public String getHeight() { return height; }
    public void setHeight(String height) { this.height = height; }

    @OneToMany(mappedBy="mountainId")
    public List<ExplorerEntityBase> getExplorers() { return this.explorers; }
    public void setExplorers(List<ExplorerEntityBase> explorers) { this.explorers = explorers; }

}

.

@Entity
public class MountainEntity extends MountainEntityBase implements Serializable {

    public List<MountainEntity> allMountainsExploredBy = new ArrayList<MountainEntity>();

    @Transient
    public List<MountianEntity> getAllMountainsExploredBy(String explorerName){
        // Implementation 
    }
}

因此任何扩展类都只在其体内定义@Transients.但是我也希望允许子类为空的情况：

@Entity
public class MountainEntity extends MountainEntityBase implements Serializable {
}

在此先感谢您的帮助.