Re: [jelly] bringing a jelly::core variable into an jelly::xml xpath

[Paul Libbrecht]

Dan Ochs wrote:
I have tried <xml:set var="input" 
select="$groups//[EMAIL PROTECTED]'content']/@desc"/> and it works, but I was 
trying to make my example simple.
What if 'content' above is a variable that the user enters at the 
command line during execution? 
You would have to parse it the same way. I think xml:parse accepts 
strings for source.

Or if I want to allow the user to enter
an entire xpath?
select="${userEnteredExpression}"

Now you see why the xpath expression is not in ${}...

Paul



From: Paul Libbrecht <[EMAIL PROTECTED]>
Reply-To: "Jakarta Commons Users List" <[EMAIL PROTECTED]>
To: Jakarta Commons Users List <[EMAIL PROTECTED]>
Subject: Re: [jelly] bringing a jelly::core variable into an 
jelly::xml xpath
Date: Thu, 14 Aug 2003 15:31:51 +0200

Dan Ochs wrote:

I'm trying to figure out a way to pass a variable from a jelly::core 
var into a jelly::xml XPath expression.  The document loading and 
parsing is working correctly. The following code does not raise an 
exception, but also does not return anything.  Any other combination 
I try rasises various exceptions, null pointer being the most common.
thanks for the help, dan

xml:
<groups>
  <group desc="I am your content description" name="content"/>
</groups>
jelly:
<xml:parse var="groups" xml="groups.xml"/>
<jelly:set var="input">$groups//[EMAIL PROTECTED]'content']/@desc</jelly:set>
<jelly:set var="desc">
  <xml:expr select="${input}"/>
</jellt:set>


Dan,

Have you tried, instead of <jelly:set var="input">... the following ?

<xml:set var="input" select="$groups//[EMAIL PROTECTED]'content']/@desc"/>


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