package io.dropwizard.jersey.jackson;
import com.fasterxml.jackson.core.JsonGenerationException;
import com.fasterxml.jackson.core.JsonProcessingException;
import io.dropwizard.jersey.errors.ErrorMessage;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.ws.rs.core.Response;
import javax.ws.rs.ext.ExceptionMapper;
import javax.ws.rs.ext.Provider;
@Provider
public class JsonProcessingExceptionMapper implements ExceptionMapper<JsonProcessingException> {
private static final Logger LOGGER = LoggerFactory.getLogger(JsonProcessingExceptionMapper.class);
@Override
public Response toResponse(JsonProcessingException exception) {
/*
* If the error is in the JSON generation, it's a server error.
*/
if (exception instanceof JsonGenerationException) {
LOGGER.warn("Error generating JSON", exception);
return Response.serverError().build();
}
final String message = exception.getOriginalMessage();
/*
* If we can't deserialize the JSON because someone forgot a no-arg constructor, it's a
* server error and we should inform the developer.
*/
if (message.startsWith("No suitable constructor found")) {
LOGGER.error("Unable to deserialize the specific type", exception);
return Response.serverError().build();
}
/*
* Otherwise, it's those pesky users.
*/
LOGGER.debug("Unable to process JSON", exception);
return Response.status(Response.Status.BAD_REQUEST)
.entity(new ErrorMessage(Response.Status.BAD_REQUEST.getStatusCode(),
"Unable to process JSON"))
.build();
}
}