XPathAPI: eval exp using nodes with default namespace 2006-09-12 - By Karr, David
Sigh. Never mind. Making the Xpath not use the empty prefix worked
fine. My mistake was a simple typo in the element name, not the prefix
or namespace.
> -----Original Message-----
> From: Karr, David
> Sent: Tuesday, September 12, 2006 3:36 PM
> To: xalan-j-users@(protected)
> Subject: RE: XPathAPI: eval exp using nodes with default namespace
>
> For a self-update, I tried implementing a PrefixResolver
> implementation.
> This gets me closer, but I'm still having trouble with the
> elements I'm using the default namespace for. In this class,
> I map the prefix "soapenv" to the SOAP namespace, and the
> empty string to my default namespace. With this, expressions
> referencing only the "soapenv" prefix work fine. However,
> expressions trying to use the default namespace fail with:
>
> "A node test that matches either NCName:* or QName was
> expected."
>
> Which basically means there was some sort of syntax error.
>
> I tried a variation of changing the empty prefix to a
> non-empty prefix, just in the prefix map and in my xpath
> expression (not in the message to parse). This doesn't fail,
> it just doesn't match anything :) .
>
> > -----Original Message-----
> > From: Karr, David
> > Sent: Tuesday, September 12, 2006 1:10 PM
> > To: xalan-j-users@(protected)
> > Subject: XPathAPI: eval exp using nodes with default namespace
> >
> > Xalan 2.7.0, JDK 1.4.2, WebLogic 8.1.4.
> >
> > I'm trying to write xpath validation expressions for the following
> > SOAP message (slightly edited). I could use some help
> understanding
> > what I'm seeing here, and how to make this work well.
> >
> > ----------------
> > <?xml version="1.0" encoding="utf-8" standalone="yes"?>
> > <soapenv:Envelope
> > xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
> > xmlns:xsd="http://www.w3.org/2001/XMLSchema"
> >
> > xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">
> > <soapenv:Body>
> > <ReportResponse xmlns="http://...">
> > <ReportUrl>https://.../Test%20Portfolio.csv</ReportUrl>
> > <Warnings/><Errors/>
> > </ReportResponse>
> > </soapenv:Body>
> > </soapenv:Envelope>
> > ----------------
> >
> > I'm processing this with code like this:
> >
> > ----------------
> > SOAPPart soapPart = message.getSOAPPart();
> > Source xmlSource = soapPart.getContent();
> > TransformerFactory transformerFactory > > TransformerFactory
.newInstance();
> > Transformer transformer = transformerFactory.newTransformer();
> > DOMResult domResult = new DOMResult();
> > transformer.transform(xmlSource, domResult);
> > Node node = domResult.getNode();
> > System.out.println("node[" + node + "]");
> >
> > Element documentElement = ((Document) node).getDocumentElement();
> >
> > for (Iterator iter = xpathStrs.iterator(); iter.hasNext(); )
> > {
> > String xpathStr = (String) iter.next();
> > XObject object = XPathAPI.eval(documentElement, xpathStr, node);
> > System.out.println("object[" + object + "]");
> > }
> > ----------------
> >
> > When I evaluate this expression: /soapenv:Envelope
> >
> > It fails, saying that "soapenv" must resolve to a namespace.
> >
> > I then tried instead: /env:Envelope
> >
> > This works (the Xobject is not null). I'm not sure why this works,
> > and the other one does not.
> >
> > Next, I tried the expression: /env:Envelope/env:Body/ReportResponse
> >
> > This fails. I'm guessing it has something to do with the fact that
> > I'm trying to use the default namespace, but I think referencing no
> > prefix in Xpath means to use "no namespace", which isn't the same
> > thing.
> >
> > What's going on here, and what do I need to do differently?
> >
>
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