Hi Sergey,
I'm in a similar situation...I must use a parameter converter for Date type
to be sure at the serialization of a Date parameter the toString() method
adds also the milliseconds info in the produced string (until now I've seen
that when a Date obj is serialized by default the string is in the format
"Wed Sep 04 16:09:02 CEST 2013" and when I rebuild the Date obj at server
side I lose the ms info).
So I've built a new parameter converter for type Date like this:

@Provider
public class TimestampParamConverter implements ParamConverter<Date> {
        
        /**
         * Required for REST ws invocation
         */
        @Override
        public Date fromString(String s) {
                //EXAMPLE TEST
                //example s: Mon May 13 14:21:47 CEST 2013
                SimpleDateFormat dateFormat = new SimpleDateFormat("EEE MMM dd 
HH:mm:ss
zzz yyyy", Locale.US);
                try {
                        return new Date(dateFormat.parse(s).getTime());
                } catch (ParseException e) {
                        log.error("Exception building the Date from 
corresponding string at REST
ws invocation. We return a NULL object. ",e);
                        return null;
                }
        }

        @Override
        public String toString(Date arg0) throws IllegalArgumentException {
                // EXAMPLE TEST
                if(arg0 != null){
                        return arg0.toString();
                }else{
                        return null;
                }
        }
}

and I've added it on client side loading the endPoint in this way:

   JAXRSClientFactoryBean proxyFactory = new JAXRSClientFactoryBean();
   proxyFactory.setServiceClass(clazz);
   proxyFactory.setAddress(address);
   List providers = new ArrayList();
   providers.add(new StringArrayBodyReader());
   providers.add(new TimestampParamConverter());
   proxyFactory.setProviders(providers);
   .....

However I'm not able to arrive in the toString() method at the REST API
invocation....
What am I doing wrong?
Thanks a lot,

Andrea



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