[jira] Commented: (XALANJ-1942) NPE on sorting using a variable

[xa...@xml.apache.org]

The following comment has been added to this issue:

     Author: Paolo Noya
    Created: Fri, 8 Oct 2004 2:10 AM
       Body:
Hi Yash, Hi Brian
I tried the patch and all work fine!
Thanks very much for your support.
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View this comment:
  http://issues.apache.org/jira/browse/XALANJ-1942?page=comments#action_53834

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View the issue:
  http://issues.apache.org/jira/browse/XALANJ-1942

Here is an overview of the issue:
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        Key: XALANJ-1942
    Summary: NPE on sorting using a variable
       Type: Bug

     Status: Resolved
   Priority: Blocker
 Resolution: FIXED

    Project: XalanJ2
 Components: 
             Xalan
   Fix Fors:
             2.6
   Versions:
             2.6

   Assignee: 
   Reporter: Paolo Noya

    Created: Tue, 14 Sep 2004 2:10 AM
    Updated: Fri, 8 Oct 2004 2:10 AM

Description:
Similar to issue n. 1577
I've a problem during sort node with xalan-j version 2.6.0 and also with 2.4.1(bundle with jdk 1.4.2_05).
I have an XML like this:

<?xml version="1.0"?>
<Peoples>
    <Person>
        <Name>Johnson</Name>
        <Level>foo</Level>
    </Person>
    <Person>
        <Name>Smith</Name>
        <Level>baz</Level>
    </Person>
    <Person>
        <Name>White</Name>
        <Level>foo</Level>
    </Person>
    <Person>
        <Name>Brown</Name>
    </Person>
    <Person>
        <Name>Black</Name>
        <Level>bar</Level>
    </Person>
</Peoples>

=======================
and I want sort by level and then by name giving a rule for 
mapping level with an arbitrary number.
I wrote an xml like this:
=======================
<?xml version="1.0"?>
<xsl:stylesheet  
xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0"
  xmlns:this="http://localhost/" exclude-result-prefixes="this"
>
 
<this:Levels>
    <Level pos="0"/><!--dummy level-->
    <Level pos="1">foo</Level>
    <Level pos="2">bar</Level>
    <Level pos="3">baz</Level>
</this:Levels>
 
<xsl:variable name="levels" 
select="document('')/xsl:stylesheet/this:Levels"/>
 
<xsl:template match="/Peoples">
    <xsl:apply-templates select="Person">
        <xsl:sort data-type="number" 
select="number($levels/Level[.=current()/Level]/@pos)"/>
        <xsl:sort select="Name"/>
    </xsl:apply-templates>
</xsl:template>
 
<xsl:template match="Person">
    <xsl:value-of select="Name"/>
</xsl:template>
 
</xsl:stylesheet>
=======================
 
during transfom, the element  <xsl:sort data-type="number" 
select="number($levels/Level[.=current()/Level]/@pos)"/> 
produce an excepiton 

javax.xml.transform.TransformerException: 
java.lang.NullPointerException

If i print the <xsl:value-of 
select="number($levels/Level[.=current()/Level]/@pos)"/> in 
"Person" template I got the correct value.

Other parsers give me the correct result.


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