Custom Query in Spring JPA Repository with Pagination

I have tried implementing JPA Repository with Spring Boot it works fine. Now if i try to implement custom query in interface which extends JpaRepository using @Query Annotation it works fine returns List of beans.(using NamedQuery). Now when i try to use pagination for custom method/query it doesn't work.

Code :

Controller :

@RequestMapping("/custompages/{pageNumber}")
public String getAllEmployeesUsingNamedQueryWithPaging(@PathVariable Integer pageNumber,Model model)
{
    Page<Employee> page = employeeService.getAllEmployeesUsingNamedQueryWithPaging(pageNumber);

    System.out.println("current page "+page);
    System.out.println("current page content"+page.getContent());

     int current = page.getNumber() + 1;
    int begin = Math.max(1, current - 5);
    int end = Math.min(begin + 10, page.getTotalPages());

    model.addAttribute("empList", page.getContent());
    model.addAttribute("empPages", page);
    model.addAttribute("beginIndex", begin);
    model.addAttribute("endIndex", end);
    model.addAttribute("currentIndex", current);

    return "employeeWorkbench";
}

Service

@Override
public Page<Employee> getAllEmployeesUsingNamedQueryWithPaging(Integer  
pageNumber) {

    PageRequest pageRequest =
            new PageRequest(pageNumber - 1, PAGE_SIZE, 
    Sort.Direction.ASC, "id");
    return   
employeeDao.getAllEmployeesUsingNamedQueryWithPaging(pageRequest);
}

Dao

@Transactional
public interface EmployeeDao  extends JpaRepository<Employee, Long>{

@Query(name="HQL_GET_ALL_EMPLOYEE_BY_ID")//Works Fine
public List<Employee> getEmpByIdUsingNamedQuery(@Param("empId") Long
empId);     

@Query(name="HQL_GET_ALL_EMPLOYEE") //throws exception
public Page<Employee> getAllEmployeesUsingNamedQueryWithPaging(Pageable     
pageable);  
}

NamedQuery

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 
3.0//EN"  
"http://hibernate.org/dtd/hibernate-mapping-3.0.dtd">

<hibernate-mapping>

<query name="HQL_GET_ALL_EMPLOYEE">from Employee</query>

<query name="HQL_GET_ALL_EMPLOYEE_BY_ID">from Employee where id = 
:empId</query>

</hibernate-mapping>

Exception : java.lang.IllegalArgumentException: Type specified for TypedQuery [java.lang.Long] is incompatible with query return type [class com.mobicule.SpringBootJPADemo.beans.Employee]

I just want to have pagination functionality provided by Spring JPA Repository for custom methods and query also. How can I achieve this?

I'm not sure why, but for some reason simply doing from Entity causes the "id" to be returned, instead you need to provide the entity returned in the select, like select f from Foo f

public interface FooRepo extends PagingAndSortingRepository<Foo, Long> {

@Query( "select f from Foo f" )
Page<Foo> findAllCustom( Pageable pageable );

Page<Foo> findAllByBarBazContaining( String baz, Pageable pageable );
}

I received the same error, with just from Foo. I also believe you can reference these by name to the xml file as you were. here's my full code

further testing says that from Foo f also works, I do not know why the alias is required, perhaps it is part of the JPQL spec.

Here is a test showing how to do simple paging, sorting by one property and sorting by multiple properties

@Test
public void testFindAllCustom() throws Exception {
    Page<Foo> allCustom = fooRepo.findAllCustom( pageable );

    assertThat( allCustom.getSize(), is( 2 ) );

    Page<Foo> sortByBazAsc = fooRepo.findAllCustom( new PageRequest( 0, 2, Sort.Direction.ASC, "bar.baz" ) );

    assertThat( sortByBazAsc.iterator().next().getBar().getBaz(), is( "2baz2bfoo" ) );

    Page<Foo> complexSort = fooRepo.findAllCustom( new PageRequest( 0, 2, new Sort(
            new Sort.Order( Sort.Direction.DESC, "bar.baz" ),
            new Sort.Order( Sort.Direction.ASC, "id" )
    ) ) );

    assertThat( complexSort.iterator().next().getBar().getBaz(), is( "baz1" ) );
}