/** PUT /transporters -> Updates an existing transporter. */
 @RequestMapping(
     value = "/transporters",
     method = RequestMethod.PUT,
     produces = MediaType.APPLICATION_JSON_VALUE)
 @Timed
 public ResponseEntity<Transporter> updateTransporter(@RequestBody Transporter transporter)
     throws URISyntaxException {
   log.debug("REST request to update Transporter : {}", transporter);
   if (transporter.getId() == null) {
     return createTransporter(transporter);
   }
   Transporter result = transporterRepository.save(transporter);
   return ResponseEntity.ok()
       .headers(HeaderUtil.createEntityUpdateAlert("transporter", transporter.getId().toString()))
       .body(result);
 }