Xpath and namespace tag problem...

Question

hello,
I have added targetNamespaces to a schema from which i am producing objects via JAXB. it has resulted in a problem!
Orignal xml document entry produced by JAXB:
<job>
<operationName>Operation Test</operationName>
</job>
New xml document entry produced by JAXB :
<job>
<operationName xmlns="http://www.me.co.uk/me/bus"> Operation Test</operationName>
</job>
Xpath query:
"/job/operationName"
returned a value ("Operation Test"), now with the namespace modifications it returns "" Any ideas?
I tried
/job/operationName/[@*] but still got nothing back
cheers
m

Answer 1

It is possible to use xpath when working with default namespaces. I do not use jaxB, but with jaxP en the methods described in: http://java.sun.com/developer/technicalArticles/xml/validationxpath/
it all works.
Example:
java-code
import org.w3c.dom.*;
import javax.xml.xpath.*;
import org.xml.sax.SAXException;
try {
    DocumentBuilder builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
    Document document = builder.parse(new File("users.xml"));
    String expression = "/users/user[@id='0']";
    XPath xpath = XPathFactory.newInstance().newXPath();
    Node userNode = (Node) xpath.evaluate(expression, doc, XPathConstants.NODE);
} catch (SAXException se) {
    se.printStackTrace();
} catch (XPathExpressionException xe){
    xe.printStackTrace();
user.xml
<users
          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xmlns="http://www.sphemy.com/xmlrss/user"
          xsi:schemaLocation="http://www.sphemy.com/xmlrss/user user.xsd">
     <user id="0">
          <loginName>guest</loginName>
          <password>guest</password>
     </user>
</users>
user.xsd
<xs:schema
          xmlns:xs="http://www.w3.org/2001/XMLSchema"
          xmlns="http://www.sphemy.com/xmlrss/user"
          targetNamespace="http://www.sphemy.com/xmlrss/user"
          elementFormDefault="qualified">
     <xs:element name="users">
          <xs:complexType>
               <xs:sequence>
                    <xs:element name="user" type="UserType" maxOccurs="unbounded"/>
               </xs:sequence>
          </xs:complexType>
     </xs:element>
     <xs:complexType name="UserType">
          <xs:sequence>
               <xs:element name="loginName" type="xs:string"/>
               <xs:element name="password" type="xs:string"/>
          </xs:sequence>
     </xs:complexType>
</xs:schema>Edited by: sphemy on Jan 2, 2009 4:50 AM