[Exist-open] problems with cocoon and exist

[Edwin M. <edw...@ho...>]

Hi,

I am implementing  a digital library with exist.

Doing a query on a collection and the database doesn't contain the term 
query, instead return "nothing found" or 0 records found, cocoon send a 
error message. and when the database contains the term, always goes ok.

I probed the library example from exist, and I get similar results. if the 
term is in the db, works fine, but if it isn't, cocoon return a error.

I guess the problem is in <xmldb:current-node> that is empy:

       <xmldb:for-each query="document(*)//rdf:Description[...]">
            <xmldb:current-node/>
       </xmldb:for-each>

How Do I know if the query was succesfully or retrieved results? I think the 
attribute @count from <xmldb:result-set> assumes that xmldb:current-node has 
data or not?

thanks in advance.

the message returned by cocoon is:

query returned null
An error occurred
The org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode notifies 
that org.apache.cocoon.ProcessingException says:

Exception during processing of 
file:/C:/java/eXist-0.9.1/webapp/query/main.xml

More precisely:

org.apache.cocoon.ProcessingException: Exception during processing of 
file:/C:/java/eXist-0.9.1/webapp/query/main.xml: java.lang.RuntimeException: 
java.util.EmptyStackException


extra info
full exception chain stacktrace show
Original exception : java.lang.RuntimeException: 
java.util.EmptyStackException
at 
org.apache.xalan.transformer.TransformerImpl.run(TransformerImpl.java:3170)
at 
org.apache.xalan.transformer.TransformerHandlerImpl.endDocument(TransformerHandlerImpl.java:433)
at 
org.apache.cocoon.xml.AbstractXMLPipe.endDocument(AbstractXMLPipe.java:91)
at 
org.apache.cocoon.transformation.TraxTransformer.endDocument(TraxTransformer.java:578)
at org.apache.xerces.parsers.AbstractSAXParser.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.dispatch(Unknown 
Source)
at 
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown 
Source)
at org.apache.xerces.parsers.DTDConfiguration.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.avalon.excalibur.xml.JaxpParser.parse(JaxpParser.java:269)
at org.apache.avalon.excalibur.xml.JaxpParser.parse(JaxpParser.java:222)
at 
org.apache.cocoon.components.source.AbstractStreamSource.toSAX(AbstractStreamSource.java:206)
at 
org.apache.cocoon.generation.FileGenerator.generate(FileGenerator.java:143)
at 
org.apache.cocoon.components.pipeline.CachingEventPipeline.process(CachingEventPipeline.java:250)
at 
org.apache.cocoon.components.pipeline.CachingStreamPipeline.process(CachingStreamPipeline.java:399)
at 
org.apache.cocoon.components.treeprocessor.sitemap.SerializeNode.invoke(SerializeNode.java:153)
at 
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:85)
at 
org.apache.cocoon.components.treeprocessor.sitemap.PreparableMatchNode.invoke(PreparableMatchNode.java:156)
at 
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:109)
at 
org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode.invoke(PipelineNode.java:140)
at 
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:109)
at 
org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode.invoke(PipelinesNode.java:144)
at 
org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreeProcessor.java:328)
at 
org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreeProcessor.java:293)
at 
org.apache.cocoon.components.treeprocessor.sitemap.MountNode.invoke(MountNode.java:131)
at 
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:85)
at 
org.apache.cocoon.components.treeprocessor.sitemap.PreparableMatchNode.invoke(PreparableMatchNode.java:156)
at 
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:109)
at 
org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode.invoke(PipelineNode.java:140)
at 
org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:109)
at 
org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode.invoke(PipelinesNode.java:144)
at 
org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreeProcessor.java:328)
at 
org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreeProcessor.java:293)

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