Re: Xalan bug?

I have added some comments in my logic(shown below) to
help in understanding..

<?xml version="1.0"?> 
<xsl:stylesheet
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
version="1.0">
 
<xsl:output method="text" /> 

<xsl:param name="group-size" select="3" />
 
<xsl:template match="/Parent">
   <!-- calculate the no of "node" elements, which are
left as a fraction; which are to be displayed in the
last group -->
   <xsl:variable name="n" select="count(node) -
(floor((count(node) div $group-size)) * $group-size)"
/>
   
   <xsl:for-each select="node">
     <!-- determine group boundary; this if test stops
at the last "node" element of the group -->
     <xsl:if test="(position() mod $group-size) = 0">
       group <xsl:value-of select="floor(position()
div $group-size)" /><xsl:text> - </xsl:text>
       <!-- display group members -->
       <xsl:for-each select=". |
preceding-sibling::node[position() &lt;= ($group-size
- 1)]">         
         <xsl:value-of select="." /><xsl:if
test="(position() mod $group-size) !=
0"><xsl:text>,</xsl:text></xsl:if>       
       </xsl:for-each>
       <xsl:text>&#xa;</xsl:text>
     </xsl:if> 
     <!-- this if test processes the last group; whose
number of group members will be less than the
group-size -->
     <xsl:if test="((position() = last()) and
((position() mod $group-size) != 0))">
       group <xsl:value-of select="floor(position()
div $group-size) + 1" /><xsl:text> - </xsl:text>
       <xsl:for-each select=". |
preceding-sibling::node[position() &lt; $n]">
         <xsl:value-of select="." /><xsl:if
test="position() !=
last()"><xsl:text>,</xsl:text></xsl:if> 
       </xsl:for-each>
       <xsl:text>&#xa;</xsl:text>
     </xsl:if>
   </xsl:for-each>
</xsl:template>
   
</xsl:stylesheet>

I would be happy to see any discussion on this post..

Regards,
Mukul

PS: I have posted it as a bug on Xalan site. 

--- Mukul Gandhi <mukul_gandhi@xxxxxxxxx> wrote:

> Hello,
> I was solving a problem posted by a user at
> microsoft.public.xsl newsgroup. I seem to have been
> hit by a Xalan bug(Xalan-J 2.6.0), which I wish to
> confirm with members here.. 
> 
> The problem posted was -
> Subject: Grouping by two or any number
> --------------------------------------
> i have the following xml
> 
> <Parent>
>   <node>a</node>
>   <node>s</node>
>   <node>d</node>
>   <node>f</node>
>   <node>g</node>
>   <node>h</node>
>   <node>j</node>
>   <node>k</node>
>   <node>l</node>
> </Parent>
> 
> 
> Need to print in following format (into groups of
> two)
> 
> group 1 - a,s
> group 2 - d,f
> group 3 - g,h
> group 4 - j,k
> group 5 - l
> 
> I wrote the following stylesheet -
> 
> <?xml version="1.0"?> 
> <xsl:stylesheet
> xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
> version="1.0">
>  
> <xsl:output method="text" /> 
> 
> <xsl:param name="group-size" select="3" />
>  
> <xsl:template match="/Parent">
>    <xsl:variable name="n" select="count(node) -
> (floor((count(node) div $group-size)) *
> $group-size)"
> />
>    
>    <xsl:for-each select="node">
>      <xsl:if test="(position() mod $group-size) =
> 0">
>        group <xsl:value-of select="floor(position()
> div $group-size)" /><xsl:text> - </xsl:text>
>        <xsl:for-each select=". |
> preceding-sibling::node[position() &lt;=
> ($group-size
> - 1)]">         
>          <xsl:value-of select="." /><xsl:if
> test="(position() mod $group-size) !=
> 0"><xsl:text>,</xsl:text></xsl:if>       
>        </xsl:for-each>
>        <xsl:text>
</xsl:text>
>      </xsl:if> 
>      <xsl:if test="((position() = last()) and
> ((position() mod $group-size) != 0))">
>        group <xsl:value-of select="floor(position()
> div $group-size) + 1" /><xsl:text> - </xsl:text>
>        <xsl:for-each select=". |
> preceding-sibling::node[position() &lt; $n]">
>          <xsl:value-of select="." /><xsl:if
> test="position() !=
> last()"><xsl:text>,</xsl:text></xsl:if> 
>        </xsl:for-each>
>        <xsl:text>
</xsl:text>
>      </xsl:if>
>    </xsl:for-each>
> </xsl:template>
>    
> </xsl:stylesheet>
> 
> I invoke Xalan like this:
> java org.apache.xalan.xslt.Process -in file.xml -xsl
> file.xsl -PARAM group-size 2
> 
> The output is fine for -PARAM group-size values of
> 1,2,3 & 4. But for -PARAM group-size values of 5 and
> above, the ouput is not coming as expected. For
> e.g.,
> for -PARAM group-size 5, the output received is -
> 
> group 1 - a,s,d,f,g
> group 2 - h,
> 
> I tested the same XSL with Saxon-SA 8.1.1 and MSXSL
> 4,
> and both produce correct result for all the cases.
> Both Saxon and MSXSL produce the following output
> for
> group-size=5 -
> 
> group 1 - a,s,d,f,g
> group 2 - h,j,k,l
> 
> Does this look like a Xalan bug?
> 
> Regards,
> Mukul



	
		
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