Re: [xsl] To simulate SORT inside a xsl:choose condition

[Greg Faron <gfaron at integretechpub dot com>]

At 04:15 PM 4/29/2002, you wrote:
>Hi all ,
>
>I know that the rule to sort  should be immediately after <xsl:for-each >
>I am in  a situation where i have to read the  criteria to sort  from some 
>some node in the beginning of  XML
>and based on which i need to make a decision to sortBY corresponding node 
>somewhere down the line....
>
>
>But  as you know  the following way doesnt work ...
>
><xsl:for-each select="somenode">
>     <xsl:choose>
>        <xsl;when test="$prevnode = 'criteriavalue' ">
>              <xsl:sort  order="ascending"  select="node_to_be_sorted"/>
>       </xsl:when>
>     </xsl:choose>
>
></xsl:for-each>
>
>Note: dont worry about syntax check on this ...
>
>Is there a way to sneak around and get this Sorting to work based on some 
>criteria ...Or any other work arounds, suggestions?

   I think the answer depends on what the tests are (e.g. What is 
$prevnode?).  If your test is based on some value of the nodes selected by 
the for-each, then you're asking to re-order everything after you get and 
test the first item.  This is not good.  The workaround here is to select 
items based on that value in the original for-each selection.

   If, on the other hand, your tests are based on some external value, it's 
pretty easy.  You just create multiple for-each's and only execute the one 
you need.
<xsl:choose>
   <xsl:when test="$prevnode='criteriavalue1'">
     <xsl:for-each select="somenode">
       <xsl:sort order="ascending" select="node_to_be_sorted"/>
     </xsl:for-each>
   </xsl:when>
   <xsl:when test="$prevnode='criteriavalue2'">
     <xsl:for-each select="somenode">
       <xsl:sort order="descending" select="other_node_to_be_sorted"/>
     </xsl:for-each>
   </xsl:when>
</xsl:choose>


Greg Faron
Integre Technical Publishing Co.



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