Xpath and Namespaces problems

Question

Hello there! I'm using XPath to parse a document, and so far It was working great! I'm having issues with namespaces though. When the DocumentBuilder is not namespace aware. It works ok. But, when it is namespaceaware. I need to prefix my xpath expressions. for instance "//foo:message". Altough I'm using a namespacecontext and passing it to the Xpath:
public class FooNamespaceContext implements NamespaceContext {
     public String getNamespaceURI(String prefix) {
          if (prefix == null) throw new NullPointerException("Null prefix");
          else if ("foo".equals(prefix)) return "http://acme.com/foo/schemas";
          else if ("xml".equals(prefix)) return XMLConstants.XML_NS_URI;
          return null;
     public String getPrefix(String arg0) {
          return "foo";
     public Iterator getPrefixes(String arg0) {
          throw new UnsupportedOperationException("Opera��o desnecess�ria para XPath");
}How can I just use "//message" with no xmlns prefix? Also, if the user changes de prefix on its xml It does not work.
Could someone point me to a good tutorial or something (the ones I found at Xerces page are not working)
Regards

Answer 1

Thanks for your help
"/ns1:NotificationConfig/ns1:Transport[ns1:TransportName='" + transportName + "'][1]/ns1:TransportClass/text()" Works fine if I add the prefix to the XML document I'm parsing. However I'll need to look into the the namespace binding you suggested for when I cannot guarantee that the prefix will be present.