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From "Michael Hedenus (JIRA)" <xalan-...@xml.apache.org>
Subject [jira] Created: (XALANJ-2373) Variables within variables are not evaluated correctly
Date Fri, 16 Mar 2007 09:21:09 GMT
Variables within variables are not evaluated correctly
------------------------------------------------------

                 Key: XALANJ-2373
                 URL: https://issues.apache.org/jira/browse/XALANJ-2373
             Project: XalanJ2
          Issue Type: Bug
          Components: XSLTC
    Affects Versions: 2.7
         Environment: JDK 1.5, Xalan 2.7.0
            Reporter: Michael Hedenus
            Priority: Blocker


Under some conditions variables within variables are not resolved.
Here is a usecase. Run the following stylesheet with XSLTC and use the stylesheet itself as
input.

<?xml version="1.0"?>
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:xalan="http://xml.apache.org/xalan"
xmlns:java="http://xml.apache.org/xalan/java"
exclude-result-prefixes="xalan java">
		
<xsl:output method="xml" indent="yes"/>

<xsl:variable name="vars">
<var>var1</var>
<var>var2</var>
<var>var3</var>
<var>var4</var>
</xsl:variable>

<xsl:variable name="test">
<xsl:for-each select="xalan:nodeset($vars)/var">
<xsl:variable name="s1" select="substring-after(., 'var')"/>
<out org="{.}"><xsl:value-of select="$s1"/></out>
</xsl:for-each>
</xsl:variable>

<xsl:template match="/">
<test-result>
<xsl:copy-of select="$test"/>
</test-result>
</xsl:template>
								
</xsl:stylesheet>

The output should be (as it is correctly produced by Xalan interpretive)

<?xml version="1.0" encoding="UTF-8"?>
<test-result>
<out org="var1">1</out>
<out org="var2">2</out>
<out org="var3">3</out>
<out org="var4">4</out>
</test-result>

But XSTLC produces:

<?xml version="1.0" encoding="UTF-8"?>
<test-result>
<out org="var1"/>
<out org="var2"/>
<out org="var3"/>
<out org="var4"/>
</test-result>

Somehow the content of $s1 is gone empty! Under unrepeatable circumstances this bug even leads
to a NullPointerException.
I consider this bug to be very evil.

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