[Exist-open] [BUG] XQueryGenerator extra startDocument/endDocument

[Jean-Baptiste Q. <jb...@an...>]

Hello,

The XQueryGenerator issues startDocument() and endDocument()
whereas the RemoteXMLResource already does it (on line 209 of
RemoteXMLResource.java).

A problem arises with a use-case like below (NullPointerException
with Xalan):

<map:generate type="xquery" src="foo.xq"/>
<map:transform type="xslt" src="bar.xsl"/>
<map:serialize/>

If you want to see the multiple startDocument and endDocument, use
a pipeline like this:

<map:generate type="xquery" src="foo.xq"/>
<map:transform type="log"/>
<map:transform type="xslt" src="bar.xsl"/>
<map:serialize/>

Where "log" is defined with:

<map:transformer name="log" src="org.apache.cocoon.transformation.LogTransformer"/>

You will see the output in System.out, notice that two documents
are logged instead of one, and the second is empty:

--------------------------------8<--------------------------------------
[setup] ---------------------------- [Wed Dec 08 14:45:16 CET 2004] ----------------------------

[startDocument] 

[setDocumentLocator] systemid=null,publicid=null

[startDocument] 

[startPrefixMapping] ...

[startElement] uri=,local=document,raw=document

[characters] 

<snip/>

[characters] 

[endElement] uri=,local=document,raw=document

[endPrefixMapping] ...

[endDocument] 

[endDocument] 

trying to register database
[setup] ---------------------------- [Wed Dec 08 14:45:24 CET 2004] ----------------------------

[startDocument] 

[setDocumentLocator] systemid=null,publicid=null

[startDocument] 

[startPrefixMapping] ...

[startElement] uri=,local=document,raw=document

[endElement] uri=,local=document,raw=document

[endPrefixMapping] ...

[endDocument] 

[endDocument] 
--------------------------------8<--------------------------------------


Also, I don't really understand the "for" loop in XQueryGenerator:

for (long i = 0; i < result.getSize(); i++)

Is it actually possible to get multiple results?  If it is, we
might have problems again with multiple startDocument() and
endDocument()

Thanks in advance,
-- 
Jean-Baptiste Quenot
Anyware Technologies
http://www.anyware-tech.com/