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Posted to taglibs-dev@jakarta.apache.org by bu...@apache.org on 2009/08/11 22:24:22 UTC
DO NOT REPLY [Bug 47681] New: count function returning incorrect
results
https://issues.apache.org/bugzilla/show_bug.cgi?id=47681
Summary: count function returning incorrect results
Product: Taglibs
Version: 1.1.0
Platform: PC
OS/Version: Windows XP
Status: NEW
Severity: normal
Priority: P2
Component: XTags Taglib
AssignedTo: taglibs-dev@jakarta.apache.org
ReportedBy: jsartoris@hotmail.com
--- Comment #0 from Jason <js...@hotmail.com> 2009-08-11 13:24:21 PDT ---
Hello,
I am having an issue with using the count function to count the number of
entries in an XML document.
For example, given the JSP text:
-------------------
<%@ taglib uri ="http://java.sun.com/jsp/jstl/core" prefix ="c"%>
<%@ taglib uri ="http://java.sun.com/jsp/jstl/xml" prefix ="x"%>
<x:parse var="doc" xml="<?xml version=\"1.0\" encoding=\"ISO-8859-1\"
?><world><country><id>1</id><name>Canada</name></country><country><id>2</id><name>USA</name></country></world>"
/>
<x:out select="count($doc/world/country)"/>
<br>
<x:out select="count($doc/country)"/>
-------------------
will result in the count($doc/world/country) always returns 0 (zero)
but the count($doc/country) will return 2.
Is this a bug? I have tried debugging the taglib code but I cannot figure out
what is going wrong.
Regards,
Jason
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DO NOT REPLY [Bug 47681] count function returning incorrect results
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=47681
Mark Thomas <ma...@apache.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|taglibs-dev@jakarta.apache. |dev@tomcat.apache.org
|org |
--- Comment #2 from Mark Thomas <ma...@apache.org> 2009-08-17 09:55:54 BST ---
Update assignee to Tomcat dev list
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DO NOT REPLY [Bug 47681] count function returning incorrect results
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=47681
--- Comment #1 from Jason <js...@hotmail.com> 2009-08-12 06:31:27 PDT ---
Just an addition to my original post.
The "count($doc/world/country)" call will return zero (I think it should return
2. But when you put the $doc/world/country in a x:forEach tag it will behave
correctly and result in two iterations...like this:
<x:forEach select="$doc/world/country" var="test">
found a country<br>
</x:forEach>
This will result in "found a country<br>" being printed out twice..which is
expected.
It seems that once the expression is wrapped in the count function it is not
handled properly.
I noticed in the XPathUtil.adaptParamsForXalan method is only checking if the
xpath variable starts with a '$' in order to create the appropriate Node and
resolve the variable. In the case of the count($doc/world/country) expression
this does not start with a '$' and will result in the method creating a
DummyDocument instead of resolving the variable appropriately.
Regards,
Jason
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