Hi Kief,
I've studied the quirks of XPath and found it nice and solidly specified
with a good list of examples in the w3c.org spec.
So here a quick course to lead to a simple solution for you:
"//subproject/text()" selects all subproject decendant names.
"//component[subproject=$name]" selects the components by subproject name.
so you can simple nest two loops in your .dvsl file:
## create empty ArrayList to accumulate processed subproject names to avoid repetitions
#set( $processed = [] )
<h1>Listing by Subproject</h1>
#tableStart()
## select all subproject names (will contain repetitions)
#foreach( $subproject in $node.selectNodes("/component/subproject/text()") )
## skip repetitions
#if( ! $processed.contains($subproject) )
## store in the processed list
#set( $dummy = $processed.add($subproject) )
<tr>
<td colspan="4">
<h2>$subproject Subproject</h2>
</td>
</tr>
#foreach( $comp in $node.selectNodes("//component[subproject=$subproject]" )
$context.applyTemplates($comp)
#end
#end
#end
#tableEnd()
This is untested but braincompiled and braintraced code. It should work if
Murphy didn't hit.
I've not yet found a simple solution on how to select a nodelist without
repetitions. So the ArrayList.contains() trick is the most straightforward
workaround because it does not require a $tool (using a hash).
Cheers,
Christoph
Kief Morris wrote:
>[snip]
> Ideally things like subproject would be separate tags, e.g.
>
> <component name="Digester">
> <subproject>Commons</subproject>
> <what>Parse XML into Objects</what>
> <where>Digester package</where>
> ...
> </component>
>
> My .dvsl file does this:
>
> <h1>Listing by Subproject</h1>
>
> #tableStart()
>
> #foreach ($component in $node.selectNodes("//component[@subproject]"))
> #set($dummy =
>$context.toolbox.subprojects.put($component.attrib("subproject"), $component))
> #end
> #foreach($subproject in $context.toolbox.subprojects.keySet())
> <tr>
> <td colspan="4">
> <h2>$subproject Subproject</h2>
> </td>
> </tr>
>
> #set ($complist =
>$node.selectNodes("//component[@subproject='$subproject']"))
> #foreach ($comp in $complist)
> $context.applyTemplates($comp)
> #end
> #end
>
> ... it does something similar to list the data in different ways. It first builds a
>list of unique
> "subproject" attribute values by inserting them into a HashSet (kept in the toolbox
>with the
> name "subprojects"), and then iterates over each of these and renders a table entry
>for
> each <component> node with that subproject.
>
> So, an admittedly cosmetic improvement would be to figure out how to grab those
>subproject
> names if they were child tag values, as I described above. I guess this is an xpath
>question.
--
:) Christoph Reck
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