Re: [Vtd-xml-users] Dynamic lookup using only XPath

[Jimmy Z. <jz...@xi...>]

Nice to hear that. Hope you can post it to the SO website so others
can benefit from this... 

----- Original Message -----
From: Jan Niestadt 
To:"vtd...@li..." 
Cc:
Sent:Mon, 24 Jul 2017 07:59:56 +0000
Subject:Re: [Vtd-xml-users] Dynamic lookup using only XPath

Hi,

 Just to follow up on this: I asked this question on Stack Overflow as
well, see
https://stackoverflow.com/questions/45191706/dynamic-lookup-in-vtd-xml-using-only-xpath
[1]. Unfortunately, what I was looking for is not possible directly. I
solved it by implementing a very basic variable substitution system
myself.
 Best,

 Jan Niestadt.

-------------------------
VAN: Jan Niestadt
VERZONDEN: woensdag 19 juli 2017 15:00
TO: vtd...@li... [2]
ONDERWERP: Dynamic lookup using only XPath

   Hi,

 I'm trying to use an XPath expression to find elements referring to
the current element in VTD-XML. So say my XML contains books and
ratings and looks like this:

   
   
   
   

 First I'm iterating over all book elements. Then, for each book, I
want to execute an XPath expression that fetches the rating for that
book. For example:

 /root/rating[@book-id=current()/@id]/@value

 This doesn't work as the current() function is exclusive to XSLT. So
I tried declaring a variable expression named "current" to "." to mean
"the current book", but that doesn't work either because (as the name
implies), a variable expression doesn't store the results of the
expression, but the expression itself.

 Is there a way to achieve this effect in VTD-XML using just an XPath
expression? (I realize there's various ways of doing it in Java code,
but I want to use pure XPath so users can easily create a
configuration file describing their data format)

 Thanks for any suggestions!
 Best,

 Jan Niestadt.

-------------------------

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Links:
------
[1]
https://stackoverflow.com/questions/45191706/dynamic-lookup-in-vtd-xml-using-only-xpath
[2] mailto:vtd...@li...