Assigning values to SOAP Header

["Pani, Gourav" <go...@brightpoint.com>]

hi,
 
i have generated stub classes using WSDL2Java to create a Client object to
post to a Web Service.  however, i need to manipulate the SOAP Header in
order to send Authorization Information before i execute the transaction.  
 
to accomplish that i just created a org.w3c.dom.Element object and tried to
create a SOAPHeaderElement using the MessageElement(org.w3c.dom.Element)
constructor.  
 
however, this gives me a null pointer exception, which is puzzling since the
org.w3c.dom.Element object called securityInformation is not null.
 
any ideas as to what i might be doing wrong.
 
tia.
 
 
        
    TransactionService serviceLocator = new TransactionServiceLocator();
    Transaction transaction = serviceLocator.getFastWebService();
    TransactionServiceSoapBindingStub stub =
(TransactionServiceSoapBindingStub) transaction;

    DocumentBuilder documentBuilder =
DocumentBuilderFactory.newInstance().newDocumentBuilder();
    Document document = documentBuilder.newDocument();
    Element securityInformation = document.createElement("SecurityInfo");
    Element authenticationElement =
document.createElement("AuthenticationInfo");
    Element authorizationElement =
document.createElement("AuthorizationInfo");
    Element fromElement = document.createElement("From");
    Element toElement = document.createElement("To");
       
    authenticationElement.setAttribute("userid", "foo");
    authenticationElement.setAttribute("password", "bar");
 
    fromElement.setAttribute("domain", "brightpoint.com");
    fromElement.setAttribute("system", "BEST");
    toElement.setAttribute("domain", "nextel.com");
    toElement.setAttribute("system",
"FAST.FASTWebService.InventoryHandler");
    authorizationElement.appendChild(fromElement);
    authorizationElement.appendChild(toElement);
 
    securityInformation.appendChild(authenticationElement);
    securityInformation.appendChild(authorizationElement);
    
    SOAPHeaderElement securityInfo = new
SOAPHeaderElement(securityInformation);
    stub.setHeader(securityInfo);
 
    SenderObject senderObject = new SenderObject();
    stub.updateInventory("Bad Santa", senderObject);