RE: To simulate SORT inside a xsl:choose condition

The most powerful solutions unfortunately require extensions.

There's xx:evaluate():

<xsl:for-each select=".....">
  <xsl:sort select="xx:evaluate($sort-key)"/>

and there's stylesheet-defined functions (here in XSLT 2.0 syntax):

<xsl:for-each select=".....">
  <xsl:sort select="xx:my-function($sort-key)"/>
...

<xsl:function name="xx:my-function">
  <xsl:param name="sort-key"/>
...


Within XSLT 1.0 though there are a number of tricks that can be useful.
There's the exclusive union trick:

<xsl:sort select="key1[condition1] | key2[condition2] | key3[condition3]"/>

where only one of the conditions is actually true.

There's also the dynamic name trick:

<xsl:sort select="*[name()=$param]"/>

and of course if the worst comes to the worst you can always write

<xsl:choose>
<xsl:when test="condition1">
  <xsl:for-each select="$x">
    <xsl:sort select="sort-key-1"/>
    <xsl:call-template name="the-work"/>
  </xsl:for-each>
</xsl:when>
<xsl:when test="condition2">
  <xsl:for-each select="$x">
    <xsl:sort select="sort-key-2"/>
    <xsl:call-template name="the-work"/>
  </xsl:for-each>
</xsl:when>
...

XSLT 2.0 also introduces a sort() function that takes a named sort key as a
parameter, which can be determined at run-time:

<xsl:for-each select="sort($x, if (condition1) then 'sortkey1' else
'sortkey2')">

Michael Kay
Software AG
home: Michael.H.Kay@xxxxxxxxxxxx
work: Michael.Kay@xxxxxxxxxxxxxx

> -----Original Message-----
> From: owner-xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> [mailto:owner-xsl-list@xxxxxxxxxxxxxxxxxxxxxx]On Behalf Of KUMAR
> NINGASHETTY
> Sent: 29 April 2002 23:15
> To: <
> Subject:  To simulate SORT inside a xsl:choose condition
>
>
> 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?
>
> thanx in advance
> - kumar
>
>
>
>  XSL-List info and archive:  http://www.mulberrytech.com/xsl/xsl-list
>


 XSL-List info and archive:  http://www.mulberrytech.com/xsl/xsl-list