Namespaces

Hi,

If I have the following XML:

<ib type="set" from="vas" id="2301181" to="DEV_LG"
xmlns="http://www.vettro.com/1/ib.xsd">
 <service username="leegardner">
  <vas:update xmlns:vas="http://www.vettro.com/1/vas.xsd">
    <vas:field name="serial">ABC</vas:field>
   </vas:object>
  </vas:update>
 </service>
</ib>

Would the following XPath extract the text node holding ABC:

/service/vas:update/vas:object/vas:field[@name='serial']/text()

Assuming the namespaces were declared:

vas -> http://www.vettro.com/1/ib.xsd

Code sample:

      xpf = XPathFactory.newInstance();
      xpath = xpf.newXPath();
      xpath.setNamespaceContext(new MyNamespaceContext());
      XPathExpression e = xpath.compile(expression);
      Object o = e.evaluate(target, XPathConstants.NODESET);  

   protected class MyNamespaceContext implements NamespaceContext
   {
      private Map namespaceMap = new HashMap();
     
      public void addNamespace(String prefix, String url)
      { namespaceMap.put(prefix, url); }
     
      public void addNamespaces(Map map)
      { namespaceMap.putAll(map); }
     
      public String getNamespaceURI(String prefix)
      {
         String s = (String)namespaceMap.get(prefix);
         if (s == null) s = "";
         return s;
      }

      public String getPrefix(String uri)
      { return null; }

      public Iterator getPrefixes(String namespaceURI)
      { return null; }
   }

(Interestingly, Saxon never calls the namespace context implementation.)



Thanks,


John



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