[xsl] Re: current()

[Dimitre Novatchev <dnovatchev at yahoo dot com>]

Hi Matthew,

> but Xalan 1.2.2 (newest) tells me
> "The current() function is not allowed in a match pattern!".
> I assume this is simply a bug in Xalan as versions prior to 1.2.1
> sort correctly, any ideas? Any work-around suggestions?

This must be a bug -- the value of the @select attribute of xsl:sort is
an expression -- not pattern.

I had to reconstruct the full stylesheet in order to test it. The test
with MSXML3 (standard and July beta) returns the following result:

<date>December</date>
<date>July</date>
<date>June</date>
<date>April</date>
<date>March</date>


The test with Saxon 5.4 returns a diferent result and it seems to me
that this could be caused by a bug in Saxon 5.4:

G:\xml\msxml\XML SDK\Samples\Tests>java  com.icl.saxon.StyleSheet   
testSort.xm
l testSort.xsl
Cannot find ParserManager.properties - using built-in parser
Cannot find ParserManager.properties - using built-in parser
Cannot find ParserManager.properties - using built-in parser
<date>December</date>
<date>March</date>
<date>July</date>
<date>June</date>
<date>April</date>


I hope that Mike Kay could help us in interpreting the different
behaviour of these two XSLT processors.

Here's the stylesheet I used with your xml source:

<xsl:stylesheet version='1.0'
xmlns:xsl='http://www.w3.org/1999/XSL/Transform'
xmlns:m="mmm"
>
<xsl:output omit-xml-declaration="yes"/>
<xsl:key name="myKey" match="person/date" use="concat(../account, '::',
.)"/>

	<m:month name="Jan" value="0"/>
	<m:month name="Feb" value="1"/>
	<m:month name="Mar" value="2"/>
	<m:month name="Apr" value="3"/>
	<m:month name="May" value="4"/>
	<m:month name="Jun" value="5"/>
	<m:month name="Jul" value="6"/>
	<m:month name="Aug" value="7"/>
	<m:month name="Sep" value="8"/>
	<m:month name="Oct" value="9"/>
	<m:month name="Nov" value="10"/>
	<m:month name="Dec" value="11"/>
	
	
	<xsl:template match="/">
		<xsl:variable name="months" select="document('')//m:month"/>
	
	<xsl:for-each 
		select="/person/date[generate-id(.)=generate-id(key('myKey', concat(
../account, '::', .))[1])]">
	
		<xsl:sort select="$months[ starts-with( current(),  @name ) ]/@value"
data-type="number" order="descending"/>
	<xsl:copy-of select="."/>
	<xsl:text>&#xA;</xsl:text>
	</xsl:for-each>		
	</xsl:template>
</xsl:stylesheet>


Cheers,
Dimitre Novatchev.


Matthew Cordes wrote:
Hello all, 

Is the current() function allowed in this syntax?


XML:

	<person>
		<account>12345</account>
		<date>December</date>
		<date>March</date>
		<date>March</date>
		<date>July</date>
		<date>March</date>
		<date>June</date>
		<date>April</date>
	</person>


XSL:


<m:month name="Jan" value="0"/>
<m:month name="Feb" value="1"/>
<m:month name="Mar" value="2"/>
<m:month name="Apr" value="3"/>
<m:month name="May" value="4"/>
<m:month name="Jun" value="5"/>
<m:month name="Jul" value="6"/>
<m:month name="Aug" value="7"/>
<m:month name="Sep" value="8"/>
<m:month name="Oct" value="9"/>
<m:month name="Nov" value="10"/>
<m:month name="Dec" value="11"/>


<xsl:variable name="months" select="document('')//m:month"/>

<xsl:for-each 
	select="person/date[generate-id(.)=generate-id(key('myKey', concat(
account, '::', .))[1])]">

	<xsl:sort select="$months[ starts-with( current(),  @name ) ]/@value"
		data-type="number" order="descending"/>

</xsl:for-each>		


As you can see, I'm trying to sort Month names in correct 
(sequential) order, but Xalan 1.2.2 (newest) tells me
"The current() function is not allowed in a match pattern!".
I assume this is simply a bug in Xalan as versions prior to 1.2.1
sort correctly, any ideas? Any work-around suggestions?

-matt




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