Martin Honnen created XALANJ-2750:
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Summary: java.lang.ClassCastException:
org.apache.xpath.objects.XNodeSet cannot be cast to
org.apache.xpath.objects.XPathMap when processing XDM array containing XDM maps
Key: XALANJ-2750
URL: https://issues.apache.org/jira/browse/XALANJ-2750
Project: XalanJ2
Issue Type: Bug
Security Level: No security risk; visible to anyone (Ordinary problems in
Xalan projects. Anybody can view the issue.)
Components: Xalan, Xalan-CmdLine
Affects Versions: The Latest Development Code
Environment: Windows 11, Java 8
Reporter: Martin Honnen
Attachments: json-doc-input-sample1.xml, process-xdm-array-test1.xsl
This is a bug report against the XSLT 3 development branch of Apache Xalan.
I have tried to use the recently implemented json-doc XPath 3.1 function but
the following code to process a JSON document being an array of objects (which
in XDM 3.1 should be an array of maps) results in an error
java.lang.ClassCastException: org.apache.xpath.objects.XNodeSet cannot be cast
to org.apache.xpath.objects.XPathMap.
With Saxon HE 12 it outputs e.g.
{code:java}
<tags>
<tag>og:POP2018</tag>
<tag>og:LHW1910</tag>
<tag>og:WHI2010</tag>
<tag>og:WHI2016</tag>
<tag>og:RHY1908</tag>
<tag>og:POW1994</tag>
<tag>og:WIN1850</tag>
<tag>og:RON2009</tag>
<tag>og:MAC1897</tag>
<tag>og:MAC1930</tag>
<!-- snipped here -->
</tags>{code}
Running the XSLT shown below against an XML input as e.g.
{code:java}
<root>
<url>https://api.zotero.org/groups/4625439/tags</url>
</root>{code}
shows the cited error with Xalan
{code:java}
<?xml version="1.0" encoding="utf-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
version="3.0"
xmlns:xs="http://www.w3.org/2001/XMLSchema";
xmlns:map="http://www.w3.org/2005/xpath-functions/map";
xmlns:array="http://www.w3.org/2005/xpath-functions/array";
exclude-result-prefixes="xs map array">
<xsl:output method="xml" indent="yes"/>
<xsl:template match="url">
<tags>
<xsl:variable name="xdm-array" select="json-doc(.)"/>
<xsl:for-each select="for $pos in (1 to array:size($xdm-array)) return
array:get($xdm-array, $pos)">
<tag>
<xsl:value-of select="map:get(., 'tag')"/>
</tag>
</xsl:for-each>
</tags>
<xsl:comment>Run with <xsl:value-of
select="system-property('xsl:vendor')"/> at <xsl:value-of
select="current-dateTime()"/></xsl:comment>
</xsl:template>
</xsl:stylesheet>
{code}
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