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https://issues.apache.org/jira/browse/XALANJ-2809?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17941828#comment-17941828
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Mukul Gandhi commented on XALANJ-2809:
--------------------------------------
[~martin.honnen]
I've committed fix for this jira issue, to Xalan-J's XSL 3 dev repos branch.
Requesting you to please verify, whether this fix works for you.
> XPTY0004 when using fold-left and XSLT defined function, followed by
> java.lang.NullPointerException
> ---------------------------------------------------------------------------------------------------
>
> Key: XALANJ-2809
> URL: https://issues.apache.org/jira/browse/XALANJ-2809
> Project: XalanJ2
> Issue Type: Bug
> Security Level: No security risk; visible to anyone(Ordinary problems in
> Xalan projects. Anybody can view the issue.)
> Components: transformation, Xalan, Xalan-CmdLine,
> Xalan-interpretive, XPath-function
> Affects Versions: The Latest Development Code
> Environment: Java 8, Windows 11
> Reporter: Martin Honnen
> Assignee: Mukul Gandhi
> Priority: Major
> Attachments: fold-left-seq-of-stylesheets-transform4.xsl,
> pass-document-node-to-xslt-function-test1.xsl, sample1.xml, sheet1.xsl,
> sheet2.xsl, sheet3.xsl
>
>
> This is a bug report against the XSLT 3.0 development branch of Xalan.
> I am still trying to use the function fold-left with some XSLT defined
> function but run into a strange error "XPTY0004 Function call argument at
> position 1 for function
> {http://example.com/mf}
> identity(), doesn't match the declared parameter type node()" followed by a
> java.lang.NullPointerException.
> {code:xml}
> <?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:mf="http://example.com/mf";
> exclude-result-prefixes="xs mf">
> <xsl:output method="xml" indent="yes"/>
> <xsl:function name="mf:identity" as="node()">
> <xsl:param name="node" as="node()"/>
> <xsl:sequence select="$node"/>
> </xsl:function>
> <xsl:template match="/">
> <xsl:copy>
> <xsl:sequence select="fold-left(//*, (), function($a, $n) { ($a,
> mf:identity($n)) })"/>
> </xsl:copy>
> </xsl:template>
> </xsl:stylesheet>
> {code}
> Run that against any XML input and you will get the XPTY0004 for each element
> node in the input followed by the NullPointerException.
>
> The code runs with with Saxon HE 12.5 Java as well as SaxonJS so I think it
> is clean and proper XSLT 3.
>
> The shown code is a reduced test case whether I can get any node passed from
> fold-left to an XSLT defined function, my real use case is using fold-left to
> chain calls of the transform function, as I get the same error "XPTY0004 :
> Function call argument at position 1 for function
> \{http://example.com/mf}transform-node(), doesn't match the declared
> parameter type node()" there I hope if the simple test case can be fixed the
> real use case also works.
> For completeness I tried to attach the real use as well but somehow attaching
> currently fails. I will try to attach the file later after I have created the
> bug issue.
>
>
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