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From "Beer, Christian" <Christian.B...@Diron.DE>
Subject RE: [jxpath] Iterating using "a/b//c//d[type='e']"...
Date Tue, 03 Jun 2003 08:30:03 GMT
Hallo!

I used the nightly build and tried to implement BeanInfo-classes and 
some other stuff. But it doesn't work...

I debugged quite a bit and found out, that it hangs in EvalContext in
line 193-198 (method performIteratorStep()). This while-loop does not
exit...

Could that be the problem?

Thanks,

Christian

> -----Original Message-----
> From: Dmitri Plotnikov [mailto:dplotnik@yahoo.com]
> Sent: Wednesday, May 28, 2003 4:59 PM
> To: Jakarta Commons Users List
> Subject: Re: [jxpath] Iterating using "a/b//c//d[type='e']"...
> 
> 
> Christian,
> 
> It's very important that you use the current nightly build.  
> There is a
> check for loops in the graph.  However, I don't think it is a 100%
> guarantee against infinite loops.  If the upgrade to the current build
> does not solve the problem, let me know - we'll have to investigate
> further.
> 
> - Dmitri
> 
> --- "Beer, Christian" <Christian.Beer@Diron.DE> wrote:
> > Hello!
> > 
> > While evaluating JXPath if it could be used in my project, I got the
> > following problem:
> > 
> > I have a very complicated object tree that can get very big. It
> > consists of
> > the following classes:
> > 
> > MyObject	(super-class of the following)
> > MyArray
> > MyName
> > MyDictionary
> > MyBoolean
> > MyString
> > MyInteger
> > MyReal
> > MyNull
> > MyReference
> > 
> > Rules:
> > - There is one root MyDictionary. 
> > - all but MyArray and MyDictionary are leaf-nodes.
> > - Keys to the dictionarys are allways MyName objects.
> > - I created a MyDictionaryHandler that gives the keys as strings to
> > jxpath.
> > - MyReference contains references to objects. 
> > - My MyDictionary and MyArray resolve this references and return the
> > real
> > objects in get and iterator.
> > - Sometimes there are items in MyDictionary called parent, that
> > contain a
> > reference on the parent-My-Object.
> > 
> > The tree would look quite complex, so I'll skip it.
> > 
> > If I call, for example "myContext.iterate("a/b//c//d[t='f']")" on a
> > quite
> > big tree, my program hangs. 
> > 
> > Does anyone have an idea? Is it a loop in my tree? Is there a known
> > bug in
> > JXPath?
> > 
> > 
> > I know it is quite complicated but I hope you can help me!
> > 
> > Thanks in advance,
> > 
> > Christian Beer
> > 
> > 
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