Always get a null exception while useing XPATH Saxon-8b

[Rishabh.Dayal]

Hi,

I always get a null exception while using XPATH Saxon-8b. I am using
this for the first time.

My xml document is:
<foo xmlns="default-namespace">
<ns1:bar xmlns:ns1="name space1-uri" xmlns="namespac e1-uri">
<baz/>
<ns2:baz xmlns:ns2="name space2-uri"/>
</ns1:bar>
<ns3:hi xmlns:hi="names pace3-uri">
<there/>
</ns3:hi>
</foo>

XPATH expression is /foo/a:bar/b:baz
java code is:

String xpathExpr = "/foo/a:bar/b:baz";

try
{
XPathFactory xpf =
XPathFactory.ne wInstance(Names paceConstant.OB JECT_MODEL_SAXO N);
}
catch( javax.xml.xpath .XPathFactoryCo nfigurationExce ption exception
)
{
System.out.prin tln( "Exception XPathFactory.ne wInstance" );
}

StandaloneConte xt context = new StandaloneConte xt();
context.declare Namespace("a"," namespace1-uri");
context.declare Namespace("b"," namespace1-uri");
NamespaceContex t namespaceContex t = new
NamespaceContex tImpl(context);
InputSource is = new InputSource(xml Expr);
SAXSource ss = new SAXSource(is);
XPathEvaluator xpe = new XPathEvaluator( );
xpe.setNamespac eContext(namesp aceContext);

String result = null;
try
{
result = xpe.evaluate(xp athExpr, ss);
}
catch( javax.xml.xpath .XPathExpressio nException exception )
{
System.out.prin tln( exception.getCa use() );
}

Any suggestions would be of great help.

Thanks
-Anurag