Re: JXTemplate: nested forEach problem

[Christopher Oliver]

What does your flowscript look like? Just a guess, but is it possible 
you are catching the exception from 
sendPage*("pipeline-containing-your-template") in  your script? That 
could explain the "generator already set" error (which occurs when you 
incorrectly call sendPage*() more than once in the same flowscript 
invocation - i.e. after catching the exception your script "falls 
through" to the next sendPage*()).

HTH,

Chris

Jeremy Quinn wrote:

I have a set of nested Beans, from with I am trying to extract values  
using JXTemplate.

album - an Album Bean
    title - String
    text - String
    . . .
    resources - ArrayList of Resource Beans
        artefact - String
        text - String
        images - ArrayList of Image Beans
            image - String
        . . .
Here is part of the Template :

<t:forEach items="#{album/resources}">
  <section>
    <title>
    <a href="../artefacts/work(#{artefact}).html" title="view the 
full  artefact">
         <!-- snip -->
    </a>
    </title>
    <p>IMAGES: #{count(images)}</p>  <!-- this reports 2 images -->
    <t:forEach items="#{images}">      <!-- this throws an exception -->
      <a href="../artefacts/image(#{image}).html" title="view  
information about this image">
        <img alt="image: #{image}"  
src="../images/thumbnail/artefacts/#{image}.jpg"/>
      </a><xsl:text>&#160;</xsl:text>
    </t:forEach>
    <p title="albums.album.commentary" i18n:attr="title">#{text}</p>
  </section>
</t:forEach>

This all works fine if I take out the inner 'forEach'.
When I leave it in I get the far from helpful (currently in 
2.1.4-dev,  generic) Exception:

org.apache.cocoon.ProcessingException: Generator already set. Cannot  
set generator 'jx' at  
file:/Users/jerm/Development/Checkouts/someproject/webapp/album.xmap: 
37:62
        at  
org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.setGene 
rator(AbstractProcessingPipeline.java:243)
        at  
org.apache.cocoon.components.pipeline.impl.AbstractCachingProcessingPipe 
line.setGenerator(AbstractCachingProcessingPipeline.java:158)

etc.

What I do not understand is that this works :
    #{count(images)}
But this throws exceptions :
    <t:forEach items="#{images}">
Any suggestions?
I have tried all of the variations in the documentation and User's 
List  that I could find.

thanks

regards Jeremy


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