when passing a null value for a XMLGregorianCalendar parameter jax-ws does so by ommiting the corresponding xml element. this causes the following excpetion from the server:
SOAPFaultException: date string can not be less than 19 charactors
when handcoding the request and representing the null value by using an empty element:
<web:gueltigVon xsd:null='true' />
everything works as expected. is there a way to tell jax-ws how to present a null value to the server?