http://github.com/FasterXML/jackson-jaxrs-providers/jackson-jaxrs-base: Pile of code that is shared by all Jackson-based JAX-RS providers. (FasterXML)
  • Tatu Saloranta
  • Christopher Currie
  • Paul Brown 
package com.fasterxml.jackson.jaxrs.base;

import com.fasterxml.jackson.databind.JsonMappingException;

import javax.ws.rs.core.Response;
import javax.ws.rs.ext.ExceptionMapper;


Implementation if ExceptionMapper to send down a "400 Bad Request" response in the event that unmappable JSON is received. 
 Note that Provider annotation was include up to Jackson 2.7, but removed from 2.8 (as per [jaxrs-providers#22] 
Since:2.2
/**
 * Implementation if {@link ExceptionMapper} to send down a "400 Bad Request"
 * response in the event that unmappable JSON is received.
 *<p>
 * Note that {@link javax.ws.rs.ext.Provider} annotation was include up to
 * Jackson 2.7, but removed from 2.8 (as per [jaxrs-providers#22]
 *
 * @since 2.2
 */
public class JsonMappingExceptionMapper implements ExceptionMapper<JsonMappingException> {
    @Override
    public Response toResponse(JsonMappingException exception) {
        return Response.status(Response.Status.BAD_REQUEST).entity(exception.getMessage()).type("text/plain").build();
    }
}