Hi Everyone,
I am using Xalan-J 2.7.1 and I have been struck with a weird behavior of
the xslt function key() - which I believe is an error.
If I define a variable like:
<xsl:variable name="var" select="key('nidkey', //nref/@nref)"/>
And use the $var as an argument for the exslt.org set funtion
"difference" I get the following error:
java.lang.RuntimeException: Programmer assertion is incorrect! - Can not
get a DTM Unless a DTMManager has been set!
If I instead define the variable var as:
<xsl:variable name="var" select="key('nidkey',
//nref/@nref)/self::node()"/>
Everything works! - but adding "/setf::node()" to something that is
already a nodeset
should not be necessary
I this an error?
Best regards
Christoffer Dam Bruun
Test transform and data here:
key-bug-test.xml:
<?xml version="1.0" encoding="UTF-8"?>
<root>
<a nid='xx'></a>
<b nid='yy'></b>
<c nid='zz'></c>
<nref nref='xx'/>
<nref nref='yy'/>
</root>
key-bug.xsl:
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
version="1.0"
xmlns:set="http://exslt.org/sets";>
<xsl:output method="xml" indent="yes"/>
<!-- make a key of all elements that have a @nid attribute -->
<xsl:key name="nidkey" match="//*...@nid]" use="@nid"/>
<xsl:template match="root">
<xsl:variable name="abc_elements" select="//a | //b | //c"/>
<!-- with this definition if ab_element the call to
set:difference fails with:
java.lang.RuntimeException: Programmer assertion is
incorrect! - Can not get a DTM Unless a DTMManager has been set!
--> <xsl:variable name="ab_element"
select="key('nidkey', //nref/@nref)"/>
<!-- with this definition if ab_element the call to
set:difference succeeds
<xsl:variable name="ab_element" select="key('nidkey',
//nref/@nref)/self::node()"/>
-->
<xsl:message>ab_element size: <xsl:value-of
select="count($ab_element)"/></xsl:message>
<testoutput>
<ab_element>
<xsl:for-each select="$ab_element">
<xsl:copy-of select="."></xsl:copy-of>
</xsl:for-each>
</ab_element>
<xsl:variable name="diff"
select="set:difference($abc_elements, $ab_element)"/>
<xsl:message>diff size: <xsl:value-of
select="count($diff)"/></xsl:message>
<diff>
<xsl:for-each select="$diff">
<xsl:copy-of select="."></xsl:copy-of>
</xsl:for-each>
</diff> </testoutput>
</xsl:template>
</xsl:stylesheet>
