Problem with xinclude...

[Stephen Winnall]

I have a problem with xinclude in a sub-sitemap and I'd be grateful if  
someone
who knows xinclude could help me with it.

I'm trying to embed HTML from other pipelines into a template. The  
other HTML
is generated correctly.

The pipe to call xinclude looks like this:

      <map:match pattern="*.html">
        <map:generate src="../all/cocoon-layout.xhtml"/>
        <map:transform src="transform/appearance.xsl">
          <map:parameter name="title" value="Table {1}"/>
          <map:parameter name="content" value="cocoon:/{1}.xhtml"/>
        </map:transform>
        <map:transform type="xinclude"/>
        <map:serialize type="xhtml"/>
      </map:match>
The file transform/appearance.xsl takes the template  
(../all/cocoon-layout.xhtml)
and inserts the following xinclude tags into it:

                <xi:include>
                    <xsl:attribute name="href"><xsl:value-of  
select="$content"/></xsl:attribute>
                </xi:include>

(I define the namespace xi in the xsl:stylesheet tag as
xmlns:xi="http://www.w3.org/2001/XInclude";).
The variable "$content" is the parameter that I pass to  
transform/appearance.xsl.

Everything works OK if I comment out the xinclude transformation in the  
pipeline. The generated
xinclude tag looks like this when I try to generate the target  
addresses.html:

<xi:include xmlns:xi="http://www.w3.org/2001/XInclude";  
href="cocoon:/addresses.xhtml" />

But when the xinclude transformation is included, I get the following  
error:

	Failed to execute pipeline.

        org.apache.cocoon.ProcessingException: Failed to execute pipeline.:
        java.lang.RuntimeException: java.lang.NullPointerException
The stack dump is below. Can anyone help me please?

Regards
Steve
------------------------------------------------------------------------ 
--------------------

org.apache.cocoon.ProcessingException: Failed to execute pipeline.:  
java.lang.RuntimeException: java.lang.NullPointerException
        at  
org.apache.cocoon.components.pipeline.impl.AbstractCachingProcessingPipe 
line.processXMLPipeline(AbstractCachingProcessingPipeline.java:293)
        at  
org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.process 
(AbstractProcessingPipeline.java:501)
        at  
org.apache.cocoon.components.treeprocessor.sitemap.SerializeNode.invoke( 
SerializeNode.java:147)
        at  
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode. 
invokeNodes(AbstractParentProcessingNode.java:84)
        at  
org.apache.cocoon.components.treeprocessor.sitemap.PreparableMatchNode.i 
nvoke(PreparableMatchNode.java:164)
        at  
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode. 
invokeNodes(AbstractParentProcessingNode.java:108)
        at  
org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode.invoke(P 
ipelineNode.java:163)
        at  
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode. 
invokeNodes(AbstractParentProcessingNode.java:108)
        at  
org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode.invoke( 
PipelinesNode.java:152)
        at  
org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreePro 
cessor.java:354)
        at  
org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreePro 
cessor.java:307)
        at  
org.apache.cocoon.components.treeprocessor.sitemap.MountNode.invoke(Moun 
tNode.java:133)
        at  
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode. 
invokeNodes(AbstractParentProcessingNode.java:84)
        at  
org.apache.cocoon.components.treeprocessor.sitemap.PreparableMatchNode.i 
nvoke(PreparableMatchNode.java:164)
        at  
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode. 
invokeNodes(AbstractParentProcessingNode.java:108)
        at  
org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode.invoke(P 
ipelineNode.java:163)
        at  
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode. 
invokeNodes(AbstractParentProcessingNode.java:108)
        at  
org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode.invoke( 
PipelinesNode.java:152)
        at  
org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreePro 
cessor.java:354)
        at  
org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreePro 
cessor.java:307)
        at org.apache.cocoon.Cocoon.process(Cocoon.java:656)
        at  
org.apache.cocoon.servlet.CocoonServlet.service(CocoonServlet.java: 
1112)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
        at  
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Applica 
tionFilterChain.java:284)
        at  
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilt 
erChain.java:204)
        at  
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValv 
e.java:256)
        at  
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveCo 
ntext.java:151)
        at  
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java: 
564)
        at  
org.apache.catalina.core.StandardContextValve.invokeInternal(StandardCon 
textValve.java:245)
        at  
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValv 
e.java:199)
        at  
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveCo 
ntext.java:151)
        at  
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java: 
564)
        at  
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java 
:195)
        at  
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveCo 
ntext.java:151)
        at  
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java 
:164)
        at  
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveCo 
ntext.java:149)
        at  
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java: 
564)
        at  
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve. 
java:156)
        at  
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveCo 
ntext.java:151)
        at  
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java: 
564)
        at  
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:972)
        at  
org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:211)
        at  
org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:309)
        at  
org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:387)
        at  
org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:673)
        at  
org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java: 
615)
        at  
org.apache.jk.common.SocketConnection.runIt(ChannelSocket.java:786)
        at  
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool 
.java:677)
        at java.lang.Thread.run(Thread.java:552)
Caused by: java.lang.RuntimeException: java.lang.NullPointerException
        at  
org.apache.xalan.transformer.TransformerImpl.run(TransformerImpl.java: 
3363)
        at  
org.apache.xalan.transformer.TransformerHandlerImpl.endDocument(Transfor 
merHandlerImpl.java:427)
        at  
org.apache.cocoon.xml.AbstractXMLPipe.endDocument(AbstractXMLPipe.java: 
91)
        at  
org.apache.cocoon.transformation.TraxTransformer.endDocument(TraxTransfo 
rmer.java:579)
        at  
org.apache.xerces.parsers.AbstractSAXParser.endDocument(Unknown Source)
        at  
org.apache.xerces.impl.dtd.XMLDTDValidator.endDocument(Unknown Source)
        at  
org.apache.xerces.impl.XMLDocumentScannerImpl.endEntity(Unknown Source)
        at org.apache.xerces.impl.XMLEntityManager.endEntity(Unknown  
Source)
        at org.apache.xerces.impl.XMLEntityScanner.load(Unknown Source)
        at org.apache.xerces.impl.XMLEntityScanner.skipSpaces(Unknown  
Source)
        at  
org.apache.xerces.impl.XMLDocumentScannerImpl$TrailingMiscDispatcher.dis 
patch(Unknown Source)
        at  
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unkno 
wn Source)
        at org.apache.xerces.parsers.XML11Configuration.parse(Unknown  
Source)
        at org.apache.xerces.parsers.DTDConfiguration.parse(Unknown  
Source)
        at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
        at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown  
Source)
        at  
org.apache.excalibur.xml.impl.JaxpParser.parse(JaxpParser.java:318)
        at  
org.apache.excalibur.xml.impl.JaxpParser.parse(JaxpParser.java:337)
        at  
org.apache.cocoon.components.source.SourceUtil.parse(SourceUtil.java: 
266)
        at  
org.apache.cocoon.generation.FileGenerator.generate(FileGenerator.java: 
141)
        at  
org.apache.cocoon.components.pipeline.impl.AbstractCachingProcessingPipe 
line.processXMLPipeline(AbstractCachingProcessingPipeline.java:272)
        ... 48 more
java.lang.RuntimeException: java.lang.NullPointerException
        at  
org.apache.xalan.transformer.TransformerImpl.run(TransformerImpl.java: 
3363)
        at  
org.apache.xalan.transformer.TransformerHandlerImpl.endDocument(Transfor 
merHandlerImpl.java:427)
        at  
org.apache.cocoon.xml.AbstractXMLPipe.endDocument(AbstractXMLPipe.java: 
91)
        at  
org.apache.cocoon.transformation.TraxTransformer.endDocument(TraxTransfo 
rmer.java:579)
        at  
org.apache.xerces.parsers.AbstractSAXParser.endDocument(Unknown Source)
        at  
org.apache.xerces.impl.dtd.XMLDTDValidator.endDocument(Unknown Source)
        at  
org.apache.xerces.impl.XMLDocumentScannerImpl.endEntity(Unknown Source)
        at org.apache.xerces.impl.XMLEntityManager.endEntity(Unknown  
Source)
        at org.apache.xerces.impl.XMLEntityScanner.load(Unknown Source)
        at org.apache.xerces.impl.XMLEntityScanner.skipSpaces(Unknown  
Source)
        at  
org.apache.xerces.impl.XMLDocumentScannerImpl$TrailingMiscDispatcher.dis 
patch(Unknown Source)
        at  
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unkno 
wn Source)
        at org.apache.xerces.parsers.XML11Configuration.parse(Unknown  
Source)
        at org.apache.xerces.parsers.DTDConfiguration.parse(Unknown  
Source)
        at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
        at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown  
Source)
        at  
org.apache.excalibur.xml.impl.JaxpParser.parse(JaxpParser.java:318)
        at  
org.apache.excalibur.xml.impl.JaxpParser.parse(JaxpParser.java:337)
        at  
org.apache.cocoon.components.source.SourceUtil.parse(SourceUtil.java: 
266)
        at  
org.apache.cocoon.generation.FileGenerator.generate(FileGenerator.java: 
141)
        at  
org.apache.cocoon.components.pipeline.impl.AbstractCachingProcessingPipe 
line.processXMLPipeline(AbstractCachingProcessingPipeline.java:272)
        at  
org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.process 
(AbstractProcessingPipeline.java:501)
        at  
org.apache.cocoon.components.treeprocessor.sitemap.SerializeNode.invoke( 
SerializeNode.java:147)
        at  
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode. 
invokeNodes(AbstractParentProcessingNode.java:84)
        at  
org.apache.cocoon.components.treeprocessor.sitemap.PreparableMatchNode.i 
nvoke(PreparableMatchNode.java:164)
        at  
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode. 
invokeNodes(AbstractParentProcessingNode.java:108)
        at  
org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode.invoke(P 
ipelineNode.java:163)
        at  
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode. 
invokeNodes(AbstractParentProcessingNode.java:108)
        at  
org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode.invoke( 
PipelinesNode.java:152)
        at  
org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreePro 
cessor.java:354)
        at  
org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreePro 
cessor.java:307)
        at  
org.apache.cocoon.components.treeprocessor.sitemap.MountNode.invoke(Moun 
tNode.java:133)
        at  
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode. 
invokeNodes(AbstractParentProcessingNode.java:84)
        at  
org.apache.cocoon.components.treeprocessor.sitemap.PreparableMatchNode.i 
nvoke(PreparableMatchNode.java:164)
        at  
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode. 
invokeNodes(AbstractParentProcessingNode.java:108)
        at  
org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode.invoke(P 
ipelineNode.java:163)
        at  
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode. 
invokeNodes(AbstractParentProcessingNode.java:108)
        at  
org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode.invoke( 
PipelinesNode.java:152)
        at  
org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreePro 
cessor.java:354)
        at  
org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreePro 
cessor.java:307)
        at org.apache.cocoon.Cocoon.process(Cocoon.java:656)
        at  
org.apache.cocoon.servlet.CocoonServlet.service(CocoonServlet.java: 
1112)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
        at  
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Applica 
tionFilterChain.java:284)
        at  
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilt 
erChain.java:204)
        at  
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValv 
e.java:256)
        at  
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveCo 
ntext.java:151)
        at  
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java: 
564)
        at  
org.apache.catalina.core.StandardContextValve.invokeInternal(StandardCon 
textValve.java:245)
        at  
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValv 
e.java:199)
        at  
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveCo 
ntext.java:151)
        at  
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java: 
564)
        at  
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java 
:195)
        at  
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveCo 
ntext.java:151)
        at  
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java 
:164)
        at  
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveCo 
ntext.java:149)
        at  
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java: 
564)
        at  
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve. 
java:156)
        at  
org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveCo 
ntext.java:151)
        at  
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java: 
564)
        at  
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:972)
        at  
org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:211)
        at  
org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:309)
        at  
org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:387)
        at  
org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:673)
        at  
org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java: 
615)
        at  
org.apache.jk.common.SocketConnection.runIt(ChannelSocket.java:786)
        at  
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool 
.java:677)
        at java.lang.Thread.run(Thread.java:552)

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