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From "Tyson Nunemacher" <Tys...@bmgi.com>
Subject Using XSLTC with Cocoon
Date Mon, 25 Nov 2002 17:30:22 GMT
Hi there,

 

Perhaps someone can help me.  I was looking into using XSLTC as my XSL
transformer with Cocoon 2.0.3.  I found some instructions on the Cocoon
Wiki site (http://outerthought.net/wiki/Wiki.jsp?page=XSLTC), and
followed them carefully, but when I tried out the transformer with a
dirt simple pipeline (generate from a simple xml file, transform with
XSLTC, serialize to XML), I got NPEs as follows:

 

ERROR   (2002-11-25) 10:03.15:031   [sitemap]
(/BMGReports/ProjX/test.xml) HttpProcessor[8080][4]/PipelineNode: Error
while processing pipeline at
file:/C:/tomcat-4.1.12/webapps/BMGReports/ProjX/subsitemap.xmap:62:20

org.apache.cocoon.ProcessingException: Exception during processing of
file:/C:/tomcat-4.1.12/webapps/BMGReports/transforms/test.xsl:
java.lang.NullPointerException

            at
org.apache.cocoon.components.source.AbstractStreamSource.toSAX(AbstractS
treamSource.java:211)

            at
org.apache.cocoon.components.xslt.XSLTProcessorImpl.getTransformerHandle
r(XSLTProcessorImpl.java:268)

            at
org.apache.cocoon.components.xslt.XSLTProcessorImpl.getTransformerHandle
r(XSLTProcessorImpl.java:239)

            at
org.apache.cocoon.transformation.TraxTransformer.setup(TraxTransformer.j
ava:298)

            . . .

java.lang.NullPointerException

            at
org.apache.xalan.xsltc.compiler.Parser.getQName(Parser.java:303)

            at
org.apache.xalan.xsltc.compiler.Parser.makeInstance(Parser.java:818)

            at
org.apache.xalan.xsltc.compiler.Parser.startElement(Parser.java:1100)

            at
org.apache.xerces.parsers.AbstractSAXParser.startElement(AbstractSAXPars
er.java:454)

            . . . 

ERROR   (2002-11-25) 10:03.15:109   [sitemap]
(/BMGReports/ProjX/test.xml) HttpProcessor[8080][4]/PipelineNode: error
notifier barfs

org.apache.cocoon.ProcessingException: Exception during processing of
file:/C:/tomcat-4.1.12/webapps/BMGReports/transforms/system/error2html.x
sl: java.lang.NullPointerException

            at
org.apache.cocoon.components.source.AbstractStreamSource.toSAX(AbstractS
treamSource.java:211)

            at
org.apache.cocoon.components.xslt.XSLTProcessorImpl.getTransformerHandle
r(XSLTProcessorImpl.java:268)

            at
org.apache.cocoon.components.xslt.XSLTProcessorImpl.getTransformerHandle
r(XSLTProcessorImpl.java:239)

            at
org.apache.cocoon.transformation.TraxTransformer.setup(TraxTransformer.j
ava:298)

            . . .

 

I like the "barfs" error.  In any case, it looks like the XSLTC
processor isn't set up properly, and when I have my error pipe transform
the error, that fails, too.  Here's my XML and XSL files:

 

test.xsl:

<?xml version="1.0"?>

 

<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">

  

  <xsl:template match="test">

    <xsl:copy-of select="." />

  </xsl:template>

        

</xsl:stylesheet>

 

test.xml:

<?xml version="1.0" encoding="UTF-8"?>

<test>

  <stuff>Test</stuff>

</test>

 

My pipe looks like this:

 

    <map:match pattern="test.xml">

       <map:generate src="../xml/test.xml" />

       <map:transform type="xslt-xsltc" src="../transforms/test.xsl" />

       <map:serialize type="xml" />

     </map:match>

 

I have Xalan (2.3.1) running side by side with XSLTC, as indicated in
the how-to on the wiki site.  I'm running on Tomcat 4.1.12 standalone at
the moment.  Xerces is the parser.  The pipe works fine with straight
Xalan.

 

So, I'm curious.  Does anyone have any insight into why XSLTC may or may
not work the way I have it set up, which is how it's described on the
wiki site?  And did I hear that there were some issues with XSLTC that
make its integration with Cocoon less than ideal?  Is there a reason I
should avoid using it with Cocoon 2.0.3 in its current form, given that
I'm looking for performance improvements which may help me out with
scalability?

 

Thanks in advance for any advice,

Tyson Nunemacher


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