To be more specific, right now I'm having a problem with the separator on decimal numbers (comma vs dot): If the wrong separator comes in a url parameter the webservice returns 404. But I'd like to find a proper solution that will handle the JSON reading/writing as well.
Note: I've tried the answer in this other question but it references classes I don't have in my Jersey jars (If, QuantityXmlAdapter and NumberPersonalizedXmlAdapter) and I can't find a clue about them on Google.