How do I make a DTO for the Page<> interface?

Question

I am writing an online store using Spring Boot (MVC) and Hiberbate. The problem is that when I get a list of drinks, JSON gives me unnecessary information from the Page interface. I don't know how you can create an DTO for the interfaces to get rid of these fields. What should I do in this situation. Can someone have a ready-made solution?

    public Page<DrinkDTO> getAllDrinks(int page, int pageSize) {

        PageRequest pageRequest = PageRequest.of(page, pageSize, Sort.by("id"));

        final Page<Drink> drinks = drinkRepository.findAll(pageRequest);

        return drinkMapper.drinksToDrinksDTO(drinks);
    }

Answer 1

@Data
@AllArgsConstructor
public class CustomPage {

    Long totalElements;

    int totalPages;

    int number;

    int size;
}

@Data
public class PageDTO<T> {

    List<T> content;

    CustomPage customPage;

    public PageDTO(Page<T> page) {
        this.content = page.getContent();
        this.customPage = new CustomPage(page.getTotalElements(),
                page.getTotalPages(), page.getNumber(), page.getSize());
    }

Service for example:

public PageDTO<DrinkDTO> getAllDrinks(int page, int pageSize) {

        PageRequest pageRequest = PageRequest.of(page, pageSize, Sort.by("id"));

        final Page<Drink> drinks = drinkRepository.findAll(pageRequest);

        return new PageDTO<DrinkDTO>(drinkMapper.drinksToDrinksDTO(drinks));
    }