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From Joerg Heinicke <jheini...@virbus.de>
Subject Re: Transformation not working
Date Mon, 22 Sep 2003 18:06:14 GMT
Hello Joel,

it seems to be a problem with the SAX events. The working of the 
solution with the intermediate file points on that. Can you add the log 
transformer before the WFSmap transformer and after the transformation 
step with "cocoon:/gmltosvg.xsl".

Joerg

Joel P W Pitt wrote:
> Hi all,
> 
> I'm having some frustrating problems in my web application.
> 
> I have a pipeline to create a geographical map, with a match as shown:
> 
> <map:match pattern="map.xsp">
>        <map:generate src="documents/map.xsp" type="serverpages"/>
>        <map:transform type="JPath"/>
>        <map:transform type="WFSmap">
>            <map:parameter name="wfs-server" 
> value="http://linux1:8080/geoserver"/>
>            <map:parameter name="colour-index" value="true"/>
>        </map:transform>
>        <!-- change transform to cocoon:/gmltosvg.xsl for dynamic xsl 
> creation-->
>        <map:transform type="xalan" src="cocoon:/gmltosvg.xsl"/>
> 
>        <map:serialize type="svg2png"/>
>        <!--<map:serialize type="xml"/>-->
> 
> </map:match>
> 
> It is called from a flowscript method, and should display a png map of 
> points.
> WFSmap is a custom transformer of mine that retrieves an XML file of map
> locations. cocoon:/gmltosvg.xsl is a xsl that is created by another 
> transformer
> in the following match:
> 
> <!-- Dynamic gmltosvg xsl creator -->
> <map:match pattern="gmltosvg.xsl">
>        <map:generate 
> src="http://linux1:8080/geoserver/DescribeFeatureType?"/>
>        <map:transform type="xalan" src="transforms/schematoxsl.xsl"/>
>        <map:transform type="xinclude"/>
>        <map:serialize type="xml"/>
> </map:match>
> 
> Now, the problem is, that the image is always blank when called using the
> first match. Now, you might question that it is a problem somewhere in 
> my xsl
> or transformer, and I certainly did at first. However, when I skip the 
> svg part and
> just display the xml, as shown:
> 
> <map:match pattern="map.xsp">
>        <map:generate src="documents/map.xsp" type="serverpages"/>
>        <map:transform type="JPath"/>
>        <map:transform type="WFSmap">
>            <map:parameter name="wfs-server" 
> value="http://linux1:8080/geoserver"/>
>            <map:parameter name="colour-index" value="true"/>
>        </map:transform>
> 
>       <map:serialize type="xml"/>
> 
> </map:match>
> 
> ... then the produced xml is exactly what I expect. I then saved this as 
> an xml file
> (map.png.xml) and tried applying the removed transformations:
> 
> <map:match pattern="map2.png">
>    <map:generate src="map.png.xml"/>
>    <map:transform type="xalan" src="cocoon:/gmltosvg.xsl"/>
>    <map:serialize  type="svg2png"/>
> </map:match>
> 
> Now, this gives me the png of the map exactly as I want it. But why 
> doesn't it
> work in the very first match I tried above?
> 
> Am I doing something wrong or is this a cocoon bug?
> I've tried making the pipeline noncaching in case that was the problem 
> (since
> the initially displayed map is meant to be blank, and the user selects what
> features to display). Maybe it is something to do with having an XSLT 
> produced
> by another XSLT?
> 
> Any insights appreciated, because I truly am stuck otherwise.
> 
> Thanks,
> Joel


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