Spring JPA Projection findAll

Question

Is it possible to use "findAll" for a JPARepository returning a Collection/List of Projections? Example:

@Entity public class Login {     @Id     @GeneratedValue(strategy = GenerationType.AUTO, generator = "native")     @GenericGenerator(name = "native", strategy = "native")     private Integer id;      private String name;      private String pass;      (...) 

}

public interface LoginProjection {     public String getName(); }  @Repository public interface LoginRepository extends JpaRepository<Login, Long> {     Login findByName(String name);      @Query(value = "SELECT name FROM login", nativeQuery = true)     List<LoginProjection> findAllLoginProjection(); } 

Using @Query it works! But it is not possible to use

 List<LoginProjection> findAll(); 

Because LoginProjection it does not extends T (Login).

I was thinking if it is possible to give a "alias" for findAll like findAllXYZ that does the same thing as findAll. Using filters it works too, but I do not want to use them:

 List<LoginProjection> findAllByName(String name); 

My main goal would be something like this:

@Repository public interface LoginRepository extends JpaRepository<Login, Long> {     Login findByName(String name);      List<Login> findAll();      List<LoginProjection> findAllLoginProjection(); } 

Which is pretty easy and with "zero @Query"

Answer 1

And add a method to the repository:

List<LoginProjection> findAllProjectedBy(); 

The method name can be simplified to findBy() to match the documentation example at https://docs.spring.io/spring-data/jpa/docs/current/reference/html/#projections