Thanks for that Sven - it gives me something to go on. Its probably a
serialization related issue. Will take a look...
BTW the best way to transmit XML documents across serialization is actually
just to use text rather than Java Serialization.
James
----- Original Message -----
From: "Sven Behrens" <[EMAIL PROTECTED]>
To: "James Strachan" <[EMAIL PROTECTED]>
Cc: "dom4j-user" <[EMAIL PROTECTED]>
Sent: Thursday, May 16, 2002 12:55 PM
Subject: Re: [dom4j-user] NullPointer in AbstractNode.createXPath
> Hi James,
>
> as I said before, I can not reproduce the problem. I just noticed the
> StackTrace one time during testing my application and without any
> change, after a restart (without changing the configuration) everything
> worked fine again.
>
> I switched the JDK during testing and I believe it was the configuration
> IBM-JDK 1.3.1 Linux on Client-Side and Sun JDK 1.3.1 Linux on server
> side when I noticed the error. The document is created at server-side,
> transfered by RMI to the client side. The error occured on client side.
>
> I will switch back to check, whether the error occurs again.
>
> +sven.
>
>
> James Strachan wrote:
> > Hi Sven
> >
> > I've added a unit test case called testCreateXPathBug() to the test case
> > org.dom4j.TestXPath in dom4j/src/test. It seems to work fine when just
> > creating a new DefaultElement instance. So I can't reproduce your
problem.
> >
> > Could you create a bit of test code that demonstrates your problem? Are
you
> > using your own special DocumentFactory or doing anything wierd or
groovy?
> >
> > James
> > ----- Original Message -----
> > From: "Sven Behrens" <[EMAIL PROTECTED]>
> > To: "James Strachan" <[EMAIL PROTECTED]>
> > Cc: "dom4j-user" <[EMAIL PROTECTED]>
> > Sent: Tuesday, May 14, 2002 8:59 AM
> > Subject: Re: [dom4j-user] NullPointer in AbstractNode.createXPath
> >
> >
> >
> >>Hi James,
> >>
> >>I am using:
> >>
> >>org.dom4j.tree.DefaultElement
> >>
> >>
> >>+sven.
> >>
> >>
> >>James Strachan wrote:
> >>
> >>>Hi Sven
> >>>
> >>>Typically the getDocumentFactory() method of AbstractNode should never
> >>>return null. What implementation of node are you using? e.g. what is
the
> >>>classname of the node you're calling createXPath() on? It'd help to
> >>
> > track
> >
> >>>down the problem...
> >>>
> >>>James
> >>>----- Original Message -----
> >>>From: "Sven Behrens" <[EMAIL PROTECTED]>
> >>>To: "dom4j-user" <[EMAIL PROTECTED]>
> >>>Sent: Monday, May 13, 2002 2:27 PM
> >>>Subject: [dom4j-user] NullPointer in AbstractNode.createXPath
> >>>
> >>>
> >>>
> >>>
> >>>>Hello,
> >>>>
> >>>>Maybe I found a bug in dom4j 1.3:
> >>>>
> >>>>I am getting a NullPointer. This happened just one time (at least I
> >>>>noticed it just one time).
> >>>>
> >>>>Here is the StackTrace:
> >>>>
> >>>>java.lang.NullPointerException
> >>>> at org.dom4j.tree.AbstractNode.createXPath(AbstractNode.java:207)
> >>>> at org.dom4j.tree.AbstractNode.selectNodes(AbstractNode.java:163)
> >>>>
> >>>>
> >>>>I call the method with a static final initialized Variable, which is
> >>>>definedly not null. It works almost all the time and I can not
reproduce
> >>>
> >>>it.
> >>>
> >>>
> >>>>The method in question looks like this in
> >>>>* @version $Revision: 1.23 $
> >>>>:
> >>>>
> >>>>
> >>>> public XPath createXPath(String xpathExpression) {
> >>>> return getDocumentFactory().createXPath(xpathExpression);
> >>>> }
> >>>>
> >>>>So, it seems to me that getDocumentFactory() returns null.
> >>>>
> >>>>
> >>>>Best regards,
> >>>> Sven Behrens.
> >>>
> >>
>
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