Spring validation : Custom validate #RequestBody based on criteria #RequestParam - spring

Question

I want to validate a requestbody with #Valid annotation.
In the method there is a #RequestParam value.
If this #RequestParam value "min" I want that a field, in requestbody, is mandatory. It's possible with annotations?
#RequestMapping(method = RequestMethod.POST, value = ProductionResponse.URL, produces = JWSMessageConverter.JWS_MEDIA_TYPE_VALUE)
#ResponseBody
public ResponseEntity<ProductionResponse> richiestaProduzione(#RequestParam("issuerType") String issuerType,
#RequestParam("issuerCode") String issuerCode, #RequestParam("procedureId") String procedureId,
#Valid #RequestBody ProductionRequestResource requestBody) {
if (LOGGER.isDebugEnabled())
LOGGER.debug("POST " + ProductionResponse.URL);
#Valid ProductionRequestResource fff = requestBody;
requestBody.setProcedureResource(issuerType, issuerCode, procedureId);
try {
ProductionResponse response = produzioneService.richiestaProduzione(requestBody);
return ResponseEntity.ok(response);
} catch (Exception e) {
LOGGER.error(e.getMessage(), e);
return ResponseEntity.badRequest().body(ProductionResponse.ko(requestBody, e.getMessage(), requestBody.getNun()));
}
}
I want that the field issuerMunicipalityCode in the ProductionRequestResource is mandatory if issuerType is equal to "MIN".

Answer 1

To continue further, here is how you can implement custom validation.
Add a validation to throw an exception when issueType is MIN and municipality code is empty/null.
#RequestMapping(method = RequestMethod.POST, value = ProductionResponse.URL, produces = JWSMessageConverter.JWS_MEDIA_TYPE_VALUE)
#ResponseBody
public ResponseEntity<ProductionResponse> richiestaProduzione(#RequestParam("issuerType") String issuerType,
#RequestParam("issuerCode") String issuerCode, #RequestParam("procedureId") String procedureId,
#RequestBody ProductionRequestResource requestBody) {
if (LOGGER.isDebugEnabled())
LOGGER.debug("POST " + ProductionResponse.URL);
if("MIN".equals(issuerType) && StringUtils.isEmpty(requestBody.getIssuerMunicipalityCode())) {
throw new IllegalArgumentException("IssuerMuncipalityCode can't be null when IssuerType is MIN");
}
try {
ProductionResponse response = produzioneService.richiestaProduzione(requestBody);
return ResponseEntity.ok(response);
} catch (Exception e) {
LOGGER.error(e.getMessage(), e);
return ResponseEntity.badRequest().body(ProductionResponse.ko(requestBody, e.getMessage(), requestBody.getNun()));
}
}
Implement exception handler to catch the exceptions and build response body based on exception types. InvalidArgumentSuppliedException that was thrown above will be caught by below exception handler. Exception Handler is a best practice to handle exceptions in a separate component.
#ControllerAdvice
public class ScnSchedulerExceptionHandler {
#ExceptionHandler(InvalidArgumentSuppliedException.class)
public final ResponseEntity<Object> handleInvalidArgException(Exception ex) {
ErrorResponseDTO errorDTO = new ErrorResponseDTO();
errorDTO.setMessage(ex.getMessage());
return new ResponseEntity<>(errorDTO, HttpStatus.NOT_ACCEPTABLE);
}
#ExceptionHandler(Exception.class)
public final ResponseEntity<Object> handleAllExceptions(Exception ex) {
ErrorResponseDTO errorDTO = new ErrorResponseDTO();
errorDTO.setMessage("Internal server error occurred.");
return new ResponseEntity<>(errorDTO, HttpStatus.INTERNAL_SERVER_ERROR);
}
}
In the exception handler, wrap the error messages in a pojo object.
public class ErrorResponseDTO {
private String errorMessage;
}