Hi there.

While trawling through the web hoping to find a solution to a bug we've
found I discovered an email with the above subject line in the archives
of this list:
http://archives.real-time.com/mailman/listinfo/cocoon-users

relevant post:
http://archives.real-time.com/pipermail/cocoon-users/2004-May/051335.html

that list seems to still be active (judging by the ongoing additions to
the archive page) but I can't actually subscribe... however the content
of the emails looks identical to the content of this mailing list...
thus why I have joined here.

aaaanyway, I was wondering if anyone here had a solution to the problem
given in the email above, as it seems to be occurring for me also.

Now, caveat here: I actually am not the person administering to our
version of cocoon - I am dealing only with the JXtemplates... so I get
to see the problem, but won't actually be the one implementing a fix...
also, I don't know many of the details about:
- the cocoon setup
- the flow and additional java stuff

as I'll be getting this info second=hand from the guy that does do this
stuff... and he's pretty buys etc...


The problem, as it appears to us, is that sometimes, when we pass a
JXPath node/text() through to some sort of attribute (eg action="x" or
href="" - note this is an attribute in the html of the template, and
even sometimes occurs in, say, jx:formatnumber num="x")

the JXtemplate just chucks a spak and doesn't give me a nice string, but
somehow treis to pass through an array of nodes...

which means that, when I have a close look at the source that has been
built) i get something along the lines of:
<a href="javascript('[Lorg.w3c.dom.Node;@346762');">click here</a>

instead of something like:
<a href="javascript('12345');">click here</a>

or, worse, I get an exception thrown such as:

org.apache.cocoon.ProcessingException: Failed to execute pipeline.:
file:/projects/appsroot/asic/screens/perextr.jx:820:54:java.lang.NumberFormatException:
 For input string: "[Lorg.w3c.dom.Node;@346762"

cause: java.lang.NumberFormatException: For input string:
"[Lorg.w3c.dom.Node;@346762"

when I try to pass it through to something like formatnumber.

Now, stuff I've checked:
1. the XML that I'm parsing at this point only has one node on it, ie
it's something like: <company><orgNum>12345</orgNum>...</company>
there are no other <orgNum> tags at this level of the DOM

2. The JXPath expression uses the correct tag names etc and isn't at a
higher level (so it's not accidentally gathering a whole bunch of
orgNum's raethr than just the one it should).

3. The guy that does the java stuff is the person that said it was
getting a whole bunch of nodes instead of just one - not sure exactly
how he figured this out.

4. Said same guy hacked up a java function that will force this thing to
make a string, so if I apply the following hack to any given situation
it will always work fine:
       <jx:set var="onum" value="#{./OrgNum/text()}"/>
       <acnconv acn="${domutils.string(onum)}" />
note: acnconv just does a formatNumber on the given number...

5. It doesn't *always* break... we haven't yet figured out when/why it
does break because it happens so intermittently and there does not seem
ot be any distinguishing characteristic of the data that does break.
However, if a given set of XML breaks at some point, it always breaks.
ie, at least it's repeatable (if not deterministic).


I'm really at a loss here as I know so little about how all this works
so I can't even begin to go looking for a solution.
We're currently faced with the possibility of having to put the
aforementioned hack into *every* spot that JXPath is required to be used
in an attribute... which is not a pretty thought at all.

Any help would be *greatly* appreciated as I'd really like to actually
solve the problem, rather than have to perpetuate an ugly hack.

Cheers and thanks in advance,
Taryn




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