Spring REST Resource - Set Default Page & Default Sort

ObservationResource.java

    private static final int DEFAULT_PAGE_NUMBER = 0;
    private static final int DEFAULT_PAGE_SIZE = 50;

    @RequestMapping(value = API_VERSION_1_OBSERVATION,
        method = RequestMethod.GET,
        produces = MediaType.APPLICATION_JSON_VALUE)
    @Timed
    public ResponseEntity<List<ApiAttachmentObservation>> findObservations(@RequestParam(required = false) String encounterId,
                                                                           @RequestParam(required = false) String patientId,
                                                                           @PageableDefault(page = DEFAULT_PAGE_NUMBER, size = DEFAULT_PAGE_SIZE)
                                                                               @SortDefault.SortDefaults({
                                                                                   @SortDefault(sort = "dateRecorded", direction = Sort.Direction.DESC),
                                                                                   @SortDefault(sort = "encounterId", direction = Sort.Direction.ASC)
                                                                               })
                                                                               Pageable pageable) throws URISyntaxException
    {
        LOGGER.info(String.format("REST request to find observations - [patientId : %s] & [encounterId : %s] & [pageable : %s]", patientId, encounterId, pageable));
        Page<ApiAttachmentObservation> page = observationService.findObservations(encounterId, patientId, pageable);
        HttpHeaders headers = PaginationUtil.generatePaginationHttpHeaders(page, API_VERSION_1_OBSERVATION);
        return new ResponseEntity<>(page.getContent(), headers, HttpStatus.OK);
    }