Xpath Namespace problem

Question

Hi,
I'm facing a problem while reading an xpath element which has namespace attached.
The xml document is as follows
<ns0:_root  xmlns:ns0="http://www.oracle.bt.bp.osm/GPRLN">
<ns0:Port_and_Routing_Details_g>
<ns0:Action_Code>
<ns0:Code1>Add</ns0:Code1>
<ns0:Code2>Delete</ns0:Code2>
<ns0:Code3>Update</ns0:Code3>
</ns0:Action_Code>
</ns0:Port_and_Routing_Details_g>
<ns0:Extended_Quantity>1</ns0:Extended_Quantity>
<ns0:Status>Pending</ns0:Status>
<ns0:Description/>
</ns0:_root> In the above xml document i want to capture the text node of <ns0:Code3>Update</ns0:Code3> i.e. I want to get Update as a result.
I'm using the following java program to to get the value by using xpath but not succeeded.
public class XMLParsing {
     public static void main(String[] args)
         try {
                   DocumentBuilderFactory domFactory = DocumentBuilderFactory.newInstance();
         domFactory.setNamespaceAware(true);
         DocumentBuilder builder = domFactory.newDocumentBuilder();
         Document doc = builder.parse("E:\\sample.xml");
         XPathFactory factory = XPathFactory.newInstance();
         XPath xpath = factory.newXPath();
          XPathExpression fax = xpath.compile("//ns0:Port_and_Routing_Details_g/ns0:Action_Code/ns0:Code3/text()");
                    Object result = fax.evaluate(doc, XPathConstants.NODESET);
          NodeList nodes = (NodeList) result;
          int len = nodes.getLength();
          System.out.println(len);
          for (int i=0; i<len;i++){
               System.out.println(nodes.item(i).getNodeValue());
         catch (ParserConfigurationException e) {
          e.printStackTrace();
          catch(SAXException e){
               e.printStackTrace();
          catch(IOException e) {
               e.printStackTrace();
          catch(XPathExpressionException e){
               e.printStackTrace();
  }Anybody please help me on this issue
Thanks

Answer 1

Hi,
put bolded code in your program.
It will resolve your problem
public class XMLParsing {
     public static void main(String[] args)
     try {
DocumentBuilderFactory domFactory = DocumentBuilderFactory.newInstance();
     domFactory.setNamespaceAware(true);
     DocumentBuilder builder = domFactory.newDocumentBuilder();
     Document doc = builder.parse("E:\\sample.xml");
*NamespaceContext ctx = new NamespaceContext() {*
*public String getNamespaceURI(String prefix) {*
String uri;
if (prefix.equals("ns0"))
uri = "http://www.oracle.bt.bp.osm/GPRLN";
else if (prefix.equals("ns2"))
uri = "http://www.davber.com/sales-format";
else
uri = null;
return uri;
*public Iterator getPrefixes(String val) {*
*     return null;*
*// Dummy implemenation - not used!*
*public String getPrefix(String uri) {*
return null;
     XPathFactory factory = XPathFactory.newInstance();
     XPath xpath = factory.newXPath();
xpath.setNamespaceContext(ctx);
     XPathExpression fax = xpath.compile("//ns0:Port_and_Routing_Details_g/ns0:Action_Code/ns0:Code3/text()");
Object result = fax.evaluate(doc, XPathConstants.NODESET);
          NodeList nodes = (NodeList) result;
          int len = nodes.getLength();
          System.out.println(len);
          for (int i=0; i<len;i++){
               System.out.println(nodes.item(i).getNodeValue());
     catch (ParserConfigurationException e) {
          e.printStackTrace();
          catch(SAXException e){
               e.printStackTrace();
          catch(IOException e) {
               e.printStackTrace();
          catch(XPathExpressionException e){
               e.printStackTrace();
}