axis-java-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Lior Wehrli <lior.weh...@adnovum.ch>
Subject Re: NullPointerException when executing XPath expression on DOM Tree in Provider<SOAPMessage>
Date Tue, 06 Mar 2012 07:11:18 GMT
Hi,

This is the fourth time I am sending this email to an axis2 mail list. 
So far I did not receive a reply. Is this the wrong list? Should I open 
a JIRA ticket? What am I doing wrong?

Please, can somebody have a look at this?

Thanks,

Lior


On 03/02/12 13:30, Lior Wehrli wrote:
> Hi,
>
> I have implemented a JAX-WS service using the Provider<SOAPMessage> 
> interface. I would like to extract elements from the SOAP request 
> using XPath. But when I execute the XPathExpression on the SOAPPart of 
> the message, I get this ugly NullPointerException. I assume that, 
> since SOAPPart implements a DOM Document, this should work.
>
> Here is an extract of my code:
>
> public SOAPMessage invoke(SOAPMessage message) {
>     XPathFactory factory = XPathFactory.newInstance();
>     XPath xpathBuilder = factory.newXPath();
>     XPathExpression xpath = 
> xpathBuilder.compile("//OnBehalfOf/UsernameToken/Username/text()");
>     Node node = (Node) xpath.evaluate(message.getSOAPPart(), 
> XPathConstants.NODE);
> }
>
> The exception:
>
> Caused by: javax.xml.transform.TransformerException: Unknown error in 
> XPath.
>     at org.apache.xpath.XPath.execute(XPath.java:363)
>     at org.apache.xpath.XPath.execute(XPath.java:301)
>     at 
> org.apache.xpath.jaxp.XPathExpressionImpl.eval(XPathExpressionImpl.java:123)
>     at 
> org.apache.xpath.jaxp.XPathExpressionImpl.eval(XPathExpressionImpl.java:97)
>     at 
> org.apache.xpath.jaxp.XPathExpressionImpl.evaluate(XPathExpressionImpl.java:178)
>     ... 38 more
> Caused by: java.lang.NullPointerException
>     at org.apache.xml.dtm.ref.dom2dtm.DOM2DTM.nextNode(DOM2DTM.java:387)
>     at 
> org.apache.xml.dtm.ref.DTMDefaultBase._nextsib(DTMDefaultBase.java:563)
>     at 
> org.apache.xml.dtm.ref.DTMDefaultBase.getNextSibling(DTMDefaultBase.java:1140)
>     at 
> org.apache.xml.dtm.ref.DTMDefaultBaseTraversers$ChildTraverser.next(DTMDefaultBaseTraversers.java:461)
>     at org.apache.xpath.axes.AxesWalker.getNextNode(AxesWalker.java:333)
>     at org.apache.xpath.axes.AxesWalker.nextNode(AxesWalker.java:361)
>     at 
> org.apache.xpath.axes.WalkingIterator.nextNode(WalkingIterator.java:192)
>     at org.apache.xpath.axes.NodeSequence.nextNode(NodeSequence.java:281)
>     at org.apache.xpath.axes.NodeSequence.runTo(NodeSequence.java:435)
>     at org.apache.xpath.axes.NodeSequence.setRoot(NodeSequence.java:218)
>     at 
> org.apache.xpath.axes.LocPathIterator.execute(LocPathIterator.java:210)
>     at org.apache.xpath.XPath.execute(XPath.java:335)
>
> I use Axis2 1.6.1 and JBoss 5
>
> Has anybody seen something like this? Am I doing something wrong? Or 
> this a bug?
>
> Thanks,
>
> Lior
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: java-dev-unsubscribe@axis.apache.org
> For additional commands, e-mail: java-dev-help@axis.apache.org

---------------------------------------------------------------------
To unsubscribe, e-mail: java-dev-unsubscribe@axis.apache.org
For additional commands, e-mail: java-dev-help@axis.apache.org


Mime
View raw message