Throwing exceptions from Spring REST webservice as JSON/XML

Albert Pinto Published at Dev

Albert Pinto

I have a REST web service controller that looks like this:

@RequestMapping(value = URIConstants.URL_DOCUMENT_SEARCH, method = RequestMethod.POST, produces = { MediaType.APPLICATION_XML_VALUE, MediaType.APPLICATION_JSON_VALUE })
protected DocumentSearchResponse getDocuments(@Valid @ModelAttribute   DocumentSearchRequest objDMSRequest,BindingResult bindingResult, HttpServletRequest objServletRequest) throws AppException
{
    if (bindingResult.hasErrors()) 
    {
       //I want to throw my custom exception here 
 ///Or can anyone suggest a more clean and efficient way

    }
-----More code and logic
}

I have a custom exception and handlers that will throw invalid HTTP invalid request exception. The custom exception has errorcode and error description fields. My requirement is is there a way to parse the error from the bindingresults to a custome exception and trow that in the controler.

Raphael Amoedo

What you can do:

return new ResponseEntity<String>(errorDescription,HttpStatus.BAD_REQUEST);

Or, you can do it hardcore if you really want to use Exception(not recommended):

try {
   throw new CustomException();
} catch(CustomException e) {
  e.printStackTrace();
  return new ResponseEntity<String>(e.getErrorDescription(),e.getStatusCode());
}

By the way: returning a Exception it's not good, that's why I don't show it.

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