[Java Spring MVC] Paging and sorting DTOs

Repo:

package com.example.ec.repo;

import com.example.ec.domain.TourRating;
import com.example.ec.domain.TourRatingPk;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;
import org.springframework.data.repository.CrudRepository;
import org.springframework.data.rest.core.annotation.RepositoryRestResource;

import java.util.List;
import java.util.Optional;

@RepositoryRestResource(exported = false)
public interface TourRatingRepository extends CrudRepository<TourRating, TourRatingPk> {
    List<TourRating> findByPkTourId(Integer tourId);

    Optional<TourRating> findByPkTourIdAndPkCustomerId(Integer tourId, Integer customerId);

    Page<TourRating> findByPkTourId(Integer tourId, Pageable pageable);
}

Controller:

    @GetMapping
    public Page<RatingDto> getAllRatingsForTour(@PathVariable(value = "tourId") int tourId, Pageable pageable) {
        verifyTour(tourId);
        Page<TourRating> ratings = tourRatingRepository.findByPkTourId(tourId, pageable);
        return new PageImpl<>(
                ratings.get()
                    .map(RatingDto::new)
                    .collect(Collectors.toList()),
                pageable,
                ratings.getTotalElements()
        );
    }