Hi,
that is because your XPath statement operates on the default
namespace (xmlns="") and when you set a different default namespace
in your document the query will yield "null" as a result of the
selectSingleNode method and your getText() will not work on null.
Note that I only tried the following to define namespace prefixes,
never to change the default namespace... but it probably would look
something like this:
try {
HashMap<String, String> map = new HashMap<String, String>();
// usually I put the prefix here as the first parameter
map.put("", "http://www.nget.com/coreapps/RunDVPRequest";);
XPath xpath = new Dom4jXPath(xpathstring);
xpath.setNamespaceContext(new SimpleNamespaceContext(map));
return xpath.selectNodes(_xml);
} catch (JaxenException e) {
System.err.println("Trouble with Jaxen...");
return null;
}
Cheers
Richard
Am 18.01.2007 um 00:07 schrieb S. Sharif:
>
> Hi,
> The following piece of code works fine
>
> primaryUserId =
> inputDocument.selectSingleNode("Document/LOGIN_LIST
> [EMAIL PROTECTED]'Primary']/LOGIN/USERID").getText();
>
> for the following xml tree
>
> <pre>
>
> <Document>
> <LOGIN_LIST filter="Primary">
> <LOGIN>
> <USERID>testuser</USERID>
> <PASSWORD>somepassword</PASSWORD>
> </LOGIN>
> </LOGIN_LIST>
> </Document>
>
> </pre>
>
>
> But when the above xml tree is modified by adding an
> xmlns attribute to the root "Document" element, the
> code no longer works and it throws a
> NullPointerException
>
> <pre>
>
> <Document
> xmlns="http://www.nget.com/coreapps/RunDVPRequest";>
> <LOGIN_LIST filter="Primary">
> <LOGIN>
> <USERID>testuser</USERID>
> <PASSWORD>somepassword</PASSWORD>
> </LOGIN>
> </LOGIN_LIST>
> </Document>
>
> </pre>
>
> Why is it no longer working? The XPath expression
> should still work?
>
>
>
> **********************************************************
> * Saladin Sharif
> * e-mail: [EMAIL PROTECTED]
> * Visit homepage @ http://gaia.ecs.csus.edu/~sharifs
> **********************************************************
>
>
>
> ______________________________________________________________________
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