JPA一对多复合主键映射

Question

我有2个表如下：

TABLE_A
-------
A_SIREN
A_NDA

TABLE_B
-------
B_id    
B_NDA
B_SIREN

表A的ID是一个COMPOSITE KEY SIREN / NDA

下面是实体代码。

重点班

@Embeddable
public class SirenNdaKey implements Serializable {
  @Column(name = "A_SIREN")        
  protected String siren;
  @Column(name = "A_NDA")        
  protected String nda;
  // getters setters
}

表A

public class EntityA{

   @EmbeddedId  
   private SirenNdaKey sirenNda;

   @OneToMany(fetch = FetchType.LAZY)
      @PrimaryKeyJoinColumns({ @PrimaryKeyJoinColumn(name = "A_SIREN", 
    referencedColumnName = "B_SIREN"),
      @PrimaryKeyJoinColumn(name = "A_NDA", referencedColumnName = "B_NDA") 
    })
   private Set<EntityB> EntityBSet;
   ...
}

表B

public class EntityB
    @Id
    private long id;
    @Column(name = "B_SIREN")
    private String siren;    
    @Column(name = "B_NDA")
    private String nda;
}

Hibernate来生成3个表：TABLE_A，表-B和关联表包含A_NDA，A_SIREN，B_ID。我该怎么办只产生2个表。

我OBJECTIF是要找到关联到同一对夫妇SIREN / NDA从实体A（entityA.getEntityBSet()），而不需要关联表的entityB的名单，因为我的表是由外部批次供应。

entityA = entityARepository.findOne(new SirenNdaKey("nda_test1", "siren_test1"));
entityA.getEntityBSet()  // this list is always empty

Answer 1

这是正确的源代码，我应该使用@JoinColumns的@PrimaryKeyJoinColumns

public class EntityA{

   @EmbeddedId  
   private SirenNdaKey sirenNda;

   @OneToMany(fetch = FetchType.LAZY)
      @JoinColumns({ @JoinColumn(name = "B_SIREN", 
    referencedColumnName = "A_SIREN"),
      @JoinColumn(name = "B_NDA", referencedColumnName = "A_NDA") 
    })
   private Set<EntityB> EntityBSet;
   ...
}