XML : How to get containing Node Name from xml namespace

I've got XPath of XML with it's structure like

  <Statement xsi:type="conditionStatement">                                  <Id>CONDITION_0001</Id>                                  <Bounds>                                      <xValue>13</xValue>                                      <yValue>145</yValue>                                      <Height>402</Height>                                      <Width>513</Width>                                  </Bounds>  .........  .........  </statement>    

Xpath takes me to xsi:type. But when I'm trying to get the name of node which is "statement" as expected, it's getting null.

My code for this is:-

  nodeList = (NodeList) xPath.compile(xPathSrcFile).evaluate(xmlDocument, XPathConstants.NODESET);  for (int i = 0; i < nodeList.getLength(); i++) {  nodeList.item(i).getParentNode();  }    

For rest of the cases, code is working perfectly fine but when it gets to "xsi", code is throwing nullpointer exception.

Need some help to get node name from this.