I need to write a stylesheet which checks the value of an attribute to
see if it is the name of an existing file. You can't do it directly in
XSLT of course, so I am following the advice of Mike Kay
(https://www.oxygenxml.com/archives/xsl-list/200506/msg00400.html) and
trying to do it with a java extension in an XSLT2 stylesheet. Here's the
relevant template, which I run with saxon EE within oXygen 18.1
<xsl:template match="tei:pb">
<xsl:variable name="filename" as="xs:string">
<xsl:value-of select="@facs"/>
</xsl:variable>
<xsl:variable name="resolvedFile" as="xs:anyURI"
select="resolve-uri(@facs, base-uri(.))"/>
<xsl:message>
<xsl:value-of select="concat($filename, ' resolves to ',
$resolvedFile)"/>
</xsl:message>
<xsl:if test="not(fs:exists(fs:new($resolvedFile)))"
xmlns:fs="java.io.File">
<xsl:value-of select="concat($filename, ' Not Found')"/>
</xsl:if>
<xsl:text>
</xsl:text>
</xsl:template>
The messages produced tell me that the filenames are being resolved
correctly (they are all relative URLs like this
../../something/foo/foo.jpg) but the test always returns true, whether
the file concerned exists or not. Am I missing something obvious? Or not
obvious? This has been driving me nuts all day...
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