XMLGregoriancalendar holder null

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Java

webservice

Hi, I'm trying to consume a web service:

import javax.jws.WebMethod;
import javax.jws.WebParam;
import javax.jws.WebService;
import javax.xml.bind.annotation.XmlSeeAlso;
import javax.xml.ws.RequestWrapper;
import javax.xml.ws.ResponseWrapper;

/**
 * This class was generated by Apache CXF 3.0.4
 * 2015-03-13T14:21:06.017-04:00
 * Generated source version: 3.0.4
 * 
 */
@WebService(targetNamespace = "http://xmlns.oracle.com/someaddress", name = "BPELProcess2")
@XmlSeeAlso({ObjectFactory.class})
public interface BPELProcess2 {

    @RequestWrapper(localName = "process", targetNamespace = "http://xmlns.oracle.com/someaddress/BPELProcess2", className = "package.Process")
    @WebMethod(action = "process")
    @ResponseWrapper(localName = "processResponse", targetNamespace = "http://xmlns.oracle.com/someaddress/BPELProcess2", className = "package.ProcessResponse")
    public void process(
        @WebParam(name = "acct_id", targetNamespace = "http://xmlns.oracle.com/someaddress/BPELProcess2")
  @WebParam(mode = WebParam.Mode.OUT, name = "lastBillDate", targetNamespace = "http://xmlns.oracle.com/someaddress/BPELProcess2")
        javax.xml.ws.Holder<javax.xml.datatype.XMLGregorianCalendar> lastBillDate,

I call this:

BPELProcess2 soap = service.getBPELProcess2Pt();
		  BindingProvider bind = (BindingProvider) soap;
		  Map<String,Object> requestContext = bind.getRequestContext();
		  requestContext.put(bind.USERNAME_PROPERTY, "user");
		  requestContext.put(bind.PASSWORD_PROPERTY, "pass");
Holder<String> acct_id = new Holder<String>();
Holder<XMLGregorianCalendar> lastBillDate = new Holder<XMLGregorianCalendar>();
String ac_id = 123;
soap.process(ac_id,lastBillDate);
Date dt= lastBillDate.value

The value of the date always comes null... i have changed the datatypes to string and also comes null. Am I missing something? I did tried to instantiate this and nothing.

lastBillDate.value  = DatatypeFactory.newInstance().newXMLGregorianCalendar();