Jersey2 Custom Date convertor - date

Question

Has anyone created a CustomConvertor class for Jersey2 to convert
ISO 8601 dates to Date /Epoch time?
I pass date as query param in ISO_8601_FORMAT = "yyyy-MM-dd'T'HH:mm:ss.SSSZ"; I need to convert to epoch seconds. I have all that is necessary, I am lost in gluing it up.
I want the custom convertor to kick in once we see the DateEpochMarker interface. I use jersey 2
what is step which I am missing?
Could some one please help me out?
I have a customer Convertor, a marker Interface and resource method.
public class DateToEpochConvertor implements ParamConverter<Long> {
private static final String ISO_8601_FORMAT = "yyyy-MM-dd'T'HH:mm:ss.SSSZ";
#Override
public Long fromString(String value) {
DateFormat df1 = new SimpleDateFormat(ISO_8601_FORMAT);
Date date = new Date();
try {
date = df1.parse(value);
} catch (ParseException e) {
throw new WebApplicationException("The Date "+value+" is not in the ISO 8601 Format ");
}
return date.getTime();
}
#Override
public String toString(Long value) {
DateFormat df1 = new SimpleDateFormat(ISO_8601_FORMAT);
Date dt = new Date();
dt.setTime(value);
return df1.format(dt);
}
}
Marker Interface
#Retention(RetentionPolicy.RUNTIME)
#Target(ElementType.PARAMETER)
public #interface DateEpochMarker {}
Resource Method
#GET
#Produces({MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
#Path("/epochtime")
public Long getEpochTime(#DateEpochMarker #QueryParam("startTime") Long startEpochTime){
return startEpochTime;
}

Answer 1

I feel foolish to answer my own Question.
Somehow I was not been able to make the above working, what I ended up was using custom Jodatime Convertor.
Pasting the code so that anyone stumbling upon the same query might have a answer
#Provider
public class DateTimeParamConverterProvider implements ParamConverterProvider {
private static final Logger LOGGER = org.slf4j.LoggerFactory.getLogger(DateTimeParamConverterProvider.class);
#Override
public <T> ParamConverter<T> getConverter(Class<T> type, Type genericType, Annotation[] annotations) {
if (type.equals(DateTime.class)) {
return (ParamConverter<T>) new DateTimeParamConverter();
} else {
return null;
}
}
private static class DateTimeParamConverter implements ParamConverter<DateTime> {
#Override
public DateTime fromString(String value) {
LOGGER.debug("The ISO Date that is provided is {}", value);
try {
return ISODateTimeFormat.dateTimeNoMillis().parseDateTime(value);
} catch (IllegalArgumentException e) {
return ISODateTimeFormat.dateTime().parseDateTime(value);
}
}
#Override
public String toString(DateTime value) {
return value.toString();
}
}
}