Upgrading to spring-3.1 seems to break my CustomWebArgumentResolver

Question

I\'m trying to upgrade a spring MVC app from 3.0.6 to 3.1.2 and some controllers that used to work don\'t seem to work anymore. I\'ve read the spring docs, but I\'m confuse

Answer 1

The API has changed with Spring 3.1 - the interface to implement to resolve a controller argument is HandlerMethodArgumentResolver. You can continue to use CustomWebArgumentResolver, by adapting it to a HandlerMethodArgumentResolver

However changing the code to use HandlerMethodArgumentResolver also will be easy:

public class CustomWebArgumentResolver implements HandlerMethodArgumentResolver {
    private AsOfDateConverter asOfDateConverter;

    @Override
    public Object resolveArgument(MethodParameter parameter, ModelAndViewContainer mavContainer, NativeWebRequest webRequest, WebDataBinderFactory binderFactory) {
        if (isAsOfDateParameter(methodParameter)) {
            return asOfDateConverter.convert(webRequest.getParameter("asOf"));
        }

        return UNRESOLVED;

    }


    @Override
    public boolean supportsParameter(MethodParameter parameter) {
        return (methodParameter.getParameterAnnotation(AsOf.class)!=null)
    }

Edit

After looking through your comments, I think I have an idea about what could be going wrong. Can you please check your @AsOf annotation, you probably have not declared the retention of Runtime, which could be the reason why the the WebArgumentResolver is not taking effect:

@Retention(RetentionPolicy.RUNTIME)
public @interface AsOf {

}

Anyway here is a gist with a full working test along the same lines:

https://gist.github.com/3703430