JPA 2.1 Result Set Mapping

orm.xml

<?xml version="1.0"?>
<entity-mappings
        xmlns="http://www.eclipse.org/eclipselink/xsds/persistence/orm"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="http://www.eclipse.org/eclipselink/xsds/persistence/orm http://www.eclipse.org/eclipselink/xsds/eclipselink_orm_2_1.xsd"
        version="2.1">

    <sql-result-set-mapping name="userTodoDetail">
        <constructor-result target-class="main.java.example.model.UserToTodoDesc">
            <column name="name"/>
            <column name="description"/>
            <column name="summary"/>
        </constructor-result>
    </sql-result-set-mapping>
    <named-native-query name="userTodoDetailQuery" result-set-mapping="userTodoDetail">
        <query>select u.name,t.description, t.summary from t_user u join todo t on u.id = t.user_id</query>
    </named-native-query>
</entity-mappings>

Service.java

List<UserToTodoDesc> userTodos = userRepository.findUserTodos();

UserRepository.java

@Repository
public interface UserRepository extends JpaRepository<User, Long> {

   *
   * @return  all users details in a list of UserToTodoDesc
   * @see UserToTodoDesc
   * @see <a href="http://google.com">http://docs.oracle.com/javaee/7/api/javax/persistence/SqlResultSetMapping.html</a>
   * @see <a href="http://google.com">https://eclipse.org/eclipselink/api/2.1/javax/persistence/SqlResultSetMapping.html</a>
   */
  //this is an example of using SqlResultSetMapping a JPA 2.1 feature
  @Query(name = "userTodoDetailQuery", nativeQuery = true)
  List<UserToTodoDesc> findUserTodos();


}