How to map Page to Page in spring-data-rest

Question

When I hit the database with PagingAndSortingRepository.findAll(Pageable) I get Page. However, I want to expose DTO\'s to the clien

Answer 1

At the end, you will not return the Page to the users, but a list of ObjectDTO, with the Page details at the header, so this would be my solution.

ObjectService

public Page findAll (Pageable pageable){
  //logic goes here.
  Page page = objectRepository.findAll(pageable);
  return page;
} 

ObjectResource / rest (the exposed endpoint)

@GetMapping
public ResponseEntity> findAll (Pageable pageable){
  Page page = objectServiceService.findAll(pageable);

  HttpHeaders headers = PaginationUtil.generatePaginationHttpHeaders(page, "your-endpoint-here");

  return new ResponseEntity<>(objectMapper.toDto(page.getContent()), headers, HttpStatus.OK);
}

The reason for using this is so that you don't need to duplicate the page details for ObjectEntity and DTO. It is key to note that a page contains the following:

• page number
• pageSize
• numberOfElements
• content

The content is the list of objects returned, and is the only thing that needs to be mapped to DTO.