private GetPhotoResponseDTO buildDTO(int b, List<String> idList) { GetPhotoResponseDTO dto = new GetPhotoResponseDTO(); ErrorDTO error = dto.getErrorDTO(); switch (b) { case 200: error = new ErrorDTO(b, "OK"); break; case 500: error = new ErrorDTO(b, "Internal Error"); break; default: break; } dto.setErrorDTO(error); if (idList != null) for (String s : idList) { dto.getPhoto().add(s); } return dto; }