[ http://issues.apache.org/jira/browse/XALANJ-1933?page=all ]
Brian Minchau updated XALANJ-1933:
----------------------------------
Version: Latest Development Code
(was: 2.6)
> for-each bug on union of elements returned by key()
> ---------------------------------------------------
>
> Key: XALANJ-1933
> URL: http://issues.apache.org/jira/browse/XALANJ-1933
> Project: XalanJ2
> Type: Bug
> Components: transformation, Xalan-interpretive
> Versions: Latest Development Code
> Environment: Operating System: Windows XP
> Platform: PC
> Reporter: calvin
> Assignee: Xalan Developers Mailing List
>
> I have encountered an unexpected transform result with Xalan that seems to be
> a
> bug. I cannot include the entire stylesheet, and I have tried to create a
> simple
> test case that would show the bug, but I have not been able to reproduce it
> in a
> simpler transform. I hope this might still be helpful, if only to others
> searching the bug database later to see that they aren't the only one that had
> the problem.
> I have the following template:
> <xsl:template name="createParamStatement">
> <xsl:if test="$includeInsertParamMarkers">
> <xsl:text>(</xsl:text>
> <xsl:for-each select="key('entityById', @id)/KeyList/Key |
> key('entityById',
> @id)/PropertyList/Property">
> <xsl:text>?</xsl:text>
> <xsl:if test="position() != last()"><xsl:text>,
> </xsl:text></xsl:if>
> </xsl:for-each>
> <xsl:text>)</xsl:text>
> </xsl:if>
> </xsl:template>
> The union expression in the xsl:for-each returns multiple Key and Property
> elements. If I run my transform as is above, I get the following output,
> regardless of how many elements were actually being iterated over:
> (?,)
> It shows the correct xsl:text for the first element matched, and then prints
> the
> comma text, which should only happen if it's not the last element, but the
> '?'
> text doesn't get printed again.
> If, on the other hand, I assign the nodes returned by the union expression to
> a
> variable, and iterate on the for-each through the node set in the variable, I
> get the correct output:
> (?,?,?,?) {or whatever}
> So, to summarize, the behavior that I'm seeing is that
> <xsl:for-each select="key('someKey', @id)/Key | key('someKey', @id)/Prop">
> <xsl:text>?</xsl:text>
> <xsl:if test="position() != last()">, </xsl:if>
> </xsl:for-each>
> behaves differently than does
> <xsl:variable name="returnedElems" select="key('someKey', @id)/Key |
> key('someKey', @id)/Prop"/>
> <xsl:for-each select="$returnedElems">
> <xsl:text>?</xsl:text>
> <xsl:if test="position() != last()">, </xsl:if>
> </xsl:for-each>
> In my failing transform, the key referenced is defined in an imported
> stylesheet. I've tried some simple transforms like above with an imported key,
> but have not been able to reproduce the problem. In the full trasnform, the
> template that behaves strangely is called from within another template, in the
> following context:
> <xsl:for-each
> select="descendant-or-self::[EMAIL PROTECTED]($parent2ThisType)]|.">
> <xsl:if test="not($mode='dependencyMode' and not(@parent2ThisType))">
> <!-- do a bunch of other stuff -->
> <xsl:variable name="paramMarkers">
> <xsl:call-template name="createParamStatement"/>
> </xsl:variable>
> <!-- do a bunch more stuff -->
> <xsl:value-of select="concat($someOtherVar, ": ", $paramMarkers)"/>
> </xsl:if>
> </xsl:for-each>
> To repeat, the behavior I'm seeing is that a union inside a for-each's select
> is
> behaving different than first binding the union results to a variable and
> passing the variable reference to the for-each's select.
> Saxon behaves the same in both cases, and outputs the correct results (a
> comma-separated list of '?' with no comma after the last '?'), and xalan-j
> 2.6.0
> behaves correctly if I assign to a variable first, but if I don't assign to a
> variable, it prints only one '?' (which is mistake number 1) and ends the list
> with a comma (which is mistake number 2, since comma shouldn't be output after
> last elem), which implies to me that perhaps the select is iterating through
> multiple nodes but only executing inside the for-each on the first node in the
> select.
> I'm sorry I can't give the entire failing stylesheet, but I am not allowed to.
> If you need more information, I'm happy to answer any questions about the
> failing transform and the context. I'll try more to create a simple failing
> test
> case, but I couldn't get one to fail right now and can't spend more time on it
> at the moment.
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