springMVC custom ListArgumentResolver

public class ListArgumentResolver implements HandlerMethodArgumentResolver{

    final String DefaultPrefix = "list";

    @Override
    public boolean supportsParameter(MethodParameter mp) {
        return mp.getParameterType() == List.class;
    }

    @Override
    public Object resolveArgument(MethodParameter mp, ModelAndViewContainer mavc, NativeWebRequest req, WebDataBinderFactory bf) throws Exception {
        log.debug("MethodParameter ...  model:{}, method:{}", mavc.getModel(), mp.getMethod());  //.get("listWrapper")
        Class c = (Class) ((ParameterizedType)mp.getGenericParameterType()).getActualTypeArguments()[0];
        ListWrapper target = new ListWrapper(c);
        //WebDataBinder binder = bf.createBinder(req, target, name);
        ReqParamPrefix prefixAnno = mp.getParameterAnnotation(ReqParamPrefix.class);
        String prefix = prefixAnno==null? DefaultPrefix : prefixAnno.value();
        MutablePropertyValues pvs = new MutablePropertyValues();
        Iterator<String> iter = req.getParameterNames();
        while(iter.hasNext()){
            String paramName = iter.next();
            if(paramName.startsWith(prefix + '['))  
                pvs.addPropertyValue( prefix==DefaultPrefix? paramName : DefaultPrefix + paramName.substring(prefix.length()), req.getParameterValues(paramName));
        }
//        Map params = WebUtils.getParametersStartingWith(req.getNativeRequest(ServletRequest.class), prefix);
//        MutablePropertyValues pvs = new ServletRequestParameterPropertyValues(req.getNativeRequest(ServletRequest.class), prefix, separator);
//        ServletRequestDataBinder binder = new ExtendedServletRequestDataBinder(target);
//        binder.bind(req.getNativeRequest(ServletRequest.class));
        //binder.registerCustomEditor(
        WebDataBinder binder = new WebDataBinder(target);
        binder.bind(pvs);
        if(mp.hasParameterAnnotation(Valid.class)){
            binder.validate();
        }
        if (binder.getBindingResult().hasErrors()) {
            throw new BindException(binder.getBindingResult());
        }
        List list = target.getList();
        return list;
    }

}

public class ListWrapper<T> implements java.io.Serializable{
    private List<T> list;
    
    public ListWrapper(Class<T> c){
        this.list = new AutoPopulatingList(c);
    }

    public List<T> getList() {
        return list;
    }

    public void setList(List<T> list) {
        this.list = list;
    }
}