Re: Problem with collection() and fetch()

Update --
Diagnostic output of intermediate stages of the merge process (turn this
DITA map into something that contains all its references as content) stored
in the source directory seems to be the problem.

Different file names, different content to any of the actual files, and it
messes up the tiny example as much as it does the main processing, so I
don't think it's the content precisely.  (It certainly doesn't get merged
again by the tiny example! and I'm morally certain the main code didn't do
that, either.)  Moving the diagnostic output to another directory solves
the problem, but I think the behaviour may still be a bug.

Thanks!
Graydon

On Wed, Sep 9, 2020 at 12:30 PM Graydon Saunders <[email protected]>
wrote:

> Hello --
>
> I'm using Saxon from inside Oxygen XML Editor.  I get the same error with
> Saxon-PE or Saxon-EE.  Saxon version is 9.9.1.7; oXygen version
> is <oXygen/> XML Editor 22.1, build 2020072902 just in case that might be
> relevant.
>
> I'm trying to use the metadata option to the collection function; this has
> worked, but sometimes something happens in response to code changes
> elsewhere in the main code and I start getting null pointer exceptions or
> "variable not evaluated" problems with the "make a map from the collection"
> step.  I've reduced this to the small example below; this one consistently
> gives me an internal error:
>
> System ID: /home/graydon/PCAS/git/DITA2Word/xslt/fetch-test.xsl
> Scenario: fetch-test
> XSL file: /home/graydon/PCAS/git/DITA2Word/xslt/fetch-test.xsl
> XML file:
> /home/graydon/PCAS/git/dita-demo-content-collection/Thunderbird/User_Guide.ditamap
> Engine name: Saxon-PE 9.9.1.7
> Severity: error
> Description: Internal error evaluating template rule  at line 34 in module
> file:/home/graydon/PCAS/git/DITA2Word/xslt/fetch-test.xsl
>
> Note that this stylesheet returns $contentMap without complaint; trying to
> produce $contentSet is what throws the error.
>
> <xsl:stylesheet exclude-result-prefixes="xs math xd map" version="3.0"
>   xmlns:math="http://www.w3.org/2005/xpath-functions/math" xmlns:xd="
> http://www.oxygenxml.com/ns/doc/xsl"
>   xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsl="
> http://www.w3.org/1999/XSL/Transform"
>   xmlns:map="http://www.w3.org/2005/xpath-functions/map">
>   <xd:doc scope="stylesheet">
>     <xd:desc>
>       <xd:p><xd:b>Created on:</xd:b> Sep 9, 2020</xd:p>
>       <xd:p><xd:b>Author:</xd:b> graydon</xd:p>
>       <xd:p />
>     </xd:desc>
>   </xd:doc>
>   <xsl:mode name="first" on-no-match="shallow-copy"/>
>   <!-- the source doc is a DITA map in a different directory -->
>   <xsl:variable as="xs:string" name="sourceDoc" select="base-uri(/)" />
>   <xsl:variable as="xs:string" name="sourceDir"
>     select="'/' || ($sourceDoc => tokenize('/'))[not(position() eq
> last())][not(matches(., 'file:', 'i'))] => string-join('/')" />
>   <xsl:variable as="map(*)+" name="contentMap"
>     select="($sourceDir || '?recurse=yes;on-error=warning;metadata=yes')
> => collection()" />
>   <xsl:variable as="map(xs:string,document-node())" name="contentSet">
>     <xsl:map>
>       <xsl:for-each select="$contentMap">
>         <xsl:if test=".?content-type eq 'application/unknown'">
>           <xsl:map-entry key=".?name" select=".?fetch()">
>             <!--<xsl:apply-templates mode="first" select=".?fetch()" />-->
>           </xsl:map-entry>
>         </xsl:if>
>       </xsl:for-each>
>     </xsl:map>
>   </xsl:variable>
>   <xd:doc>
>     <xd:desc>we need a template</xd:desc>
>   </xd:doc>
>   <xsl:template match="/">
>     <!--<bucket>
>       <xsl:sequence select="$contentMap?name"></xsl:sequence>
>     </bucket>-->
>     <bucket>
>       <xsl:sequence select="$contentSet => map:keys()" />
>     </bucket>
>   </xsl:template>
> </xsl:stylesheet>
>
> If I use
> <xsl:variable as="map(xs:string,document-node())" name="contentSet"
> select="(for $m in $contentMap return if ($m?content-type eq
> 'application/unknown') then map:entry($m?name,$m?fetch()) else ()) =>
> map:merge()" />
>
> instead of the XSLT version (which I want so I can have the apply
> templates) I get various type errors right up until the point I feed the
> whole thing into map:merge() so that it's type correct.  At that point I
> get the same error as with the XSLT version:
> System ID: /home/graydon/PCAS/git/DITA2Word/xslt/fetch-test.xsl
> Scenario: fetch-test
> XSL file: /home/graydon/PCAS/git/DITA2Word/xslt/fetch-test.xsl
> XML file:
> /home/graydon/PCAS/git/dita-demo-content-collection/Thunderbird/User_Guide.ditamap
> Engine name: Saxon-EE 9.9.1.7
> Severity: error
> Description: Internal error evaluating template rule  at line 34 in module
> file:/home/graydon/PCAS/git/DITA2Word/xslt/fetch-test.xsl
>
> The data set I'm using is a DITA test set at
> https://github.com/gnostyx/dita-demo-content-collection and I'm using
> Thunderbird/User_Guide.ditamap as the source document.  Note that this is
> outside the oXygen project where the xslt code resides, but moving it into
> the project doesn't help; same error.
>
> This approach works really well when it's working; with luck I'm doing
> something wrong and easily fixed.
>
> Thanks!
> Graydon
>
>
>
>
>
>

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