XML : Parse SOAP Message using STAX

I have written the following code to Parse SOAP message using STAX. I am getting null pointer exception at xmlStreamReader.hasNext(). Please help.

      Source src = soapMsg.getSOAPPart().getContent();      ...      HorizonHeaderData header = parser.parseHorizonHeader(src);      ...      public HorizonHeaderData parseHorizonHeader(Source src) {      HorizonHeaderData header = new HorizonHeaderData();      XMLInputFactory xmlInputFactory = XMLInputFactory.newInstance();      if (null != src) {            try {              XMLStreamReader xmlStreamReader = xmlInputFactory.createXMLStreamReader(src);                  if(xmlStreamReader==null){                  System.out.println("xmlStreamReader is null");              }                while(xmlStreamReader.hasNext()){                  int event = xmlStreamReader.getEventType();                  switch(event){                  case XMLStreamConstants.START_ELEMENT:                          System.out.println("Element: "+ xmlStreamReader.getLocalName() + "\nValue: "+ xmlStreamReader.getElementText());                  }                    xmlStreamReader.next();    

The input XML is

  <soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:bpel="http://xmlns.oracle.com/TestLoggingComposite/SSNService/BPELProcess2">     <soapenv:Header>      <oas:Security soapenv:mustUnderstand="0" xmlns:oas="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd" xmlns:soap="soap" xmlns:xsi="xsi">           <wsu:SecurityContextToken xmlns:wsu="http://docs.oasis-open.org/ws-sx/ws-secureconversation/200512">              <wsu:Identifier>${=java.util.UUID.randomUUID()}</wsu:Identifier>           </wsu:SecurityContextToken>        </oas:Security>     </soapenv:Header>     <soapenv:Body/>  </soapenv:Envelope>         

I am able see the values using DOM but there is exception using STAX. Kindly help.