Custom repository class with Spring Data?

Hi,

I'm brand new to Spring Data and trying to get my head wrapped around it a little. I understand that everything (ie: all queries, logic, etc) is generated from interface class, which is backed by the SimpleJpaRepository class. I can foresee this being very practical for any basic queries, etc.

However, how does one manage the situation if/when I need to create some custom code in the repo class? Something that cannot be addressed with a simple query? Something that may need some business logic? For instance, if I have data that I want my repo to encrypt or decrypt prior to persisting?

In a standard DAO/repo situation, I could do something along the lines of:

Code:

---

  public void save( T t){
  t.setData( Encryptor.encrypt( t.getData() ) );
  em.persist( t );
  }

  public T getById( Long id ){
  // find object
  T t =  em.find( T.class, id );
  t.setData( Decryptor.decrypt( t.getData() ) );
  return t;
  }

---

With the concept of only using an interface-based repo in Spring Data, how do I manage something like that? Do I just extend SimpleJpaRepository for my specific DAO needs and then inject that particular DAO bean into my code instead of a generic @Autowire on the interface name?

Thanks!

Eric

Hello,

I´m new to Spring Data aswell... But I think I can give you some hints...
first, this url:
http://www.petrikainulainen.net/prog...t-six-sorting/

has alot of Spring Data material. You can check it out.

Another thing, I´ve costumized my repository by doing this:

Code:

---

public interface BaseRepository<T, PK extends Serializable> extends PagingAndSortingRepository<T, PK>       
{
    public List<T> globalSearch(String value, Sort sort);   
   
}

---

and my specific repository:

Code:

---

public interface GrupoRepository extends BaseRepository<Grupo, Integer>{

        List<Grupo> findByDescricaoContaining(String descricao);
       
        @Query("select g from Grupo g where g.descricao like '%' || ?1 || '%' OR g.tipo = ?1")
        List<Grupo> globalSearch(String value, Sort sort);

}

---

notice that I didn´t implement the interfaces.. That is still done all by Spring ...
But if you want to add another layer before the repository i think you should do this:

Code:

---

public abstract class BaseService<T, PK extends Serializable> {

    private BaseRepository<T, PK> baseRepository;

    public BaseService(BaseRepository<T, PK> baseRepository) {
        this.setBaseRepository(baseRepository);
    }

    public T save(T entity) {
        //encrypt here, before sending it to the repository :)
        return this.getBaseRepository().save(entity);
    }

---

hope I could help