Spring Data + JPA过滤器

Question

有没有办法为Spring数据存储库定义允许过滤数据的通用过滤器,类似于Hibernate可用的？举个例子,如果我可以做这样的话会很酷:

@FilterDef(name = "clientSecurity", defaultCondition = "clientId in (:allowableClients)", parameters = { @ParamDef(name = "allowableClients", type = "Long") })
public interface DocumentRepository extends Repository<Document, Long> {
    public List<Document> findAll();
}

因此,在上面的示例中,我的文档存储库只返回允许客户端ID集合中属于客户端的所有文档.

Answer 1

我通过使用自定义存储库来实现这一点.据我所知,没有一种直截了当的方式.以下是我在Comment下面给出的实体上所做的.

@Entity
@FilterDef(name="filterByEmail", parameters={@ParamDef(name="email", type="string")})
@Filters( {
    @Filter(name="filterByEmail", condition=":email = email")
} )
public class Comment  {

     @Id
     @GeneratedValue(strategy=GenerationType.AUTO)
     private Long id;

     private String firstname;
     private String lastname;
     private String email;
}

如下定义存储库

@Repository
@Transactional
public interface CommentRepository extends CrudRepository<Comment, Long>,CommentRepositoryCustom {
}

在自定义存储库中获取EntityManager和启用会话的句柄.

public class CommentRepositoryImpl implements CommentRepositoryCustom{

    @PersistenceContext 
    private EntityManager entityManager;

    @Autowired
    private CommentRepository commentRepository;

    @Override
    public Iterable<Comment> findCommentWithEmail(String email) {
        Filter filter = (Filter)entityManager.unwrap(Session.class).enableFilter("filterByEmail");
        filter.setParameter("email", "arun.menon");
        Iterable<Comment> iterable = commentRepository.findAll();
        entityManager.unwrap(Session.class).disableFilter("filterByEmail");
        return iterable;
    }

}

以下是测试执行.

public void run(String... arg0) throws Exception {
    Iterable<Comment> iterable = commentService.findCommentWithEmail("test@test.com");
    System.out.println("User ois" + iterable);
}

如果您需要更通用的解决方案,请参阅此处.