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RE: Parametrized xsl:sort
- From: "Américo Albuquerque" <aalbuquerque at viseu dot ipiaget dot pt>
- To: <xsl-list at lists dot mulberrytech dot com>
- Date: Fri, 30 Aug 2002 18:13:21 +0100
- Subject: RE: [xsl] Parametrized xsl:sort
- Reply-to: xsl-list at lists dot mulberrytech dot com
Hi Neale.
you could try:
<xsl:call-template name="petTable">
<xsl:with-param name="selection"
select="pet[@species='dog']"/>
<xsl:with-param name="sortkey" select="'name'"/> <!--
select a string name instead of attribute -->
<xsl:with-param name="sortorder" select="'descending'"/>
</xsl:call-template>
<xsl:template name="petTable">
<xsl:param name="selection" select="*"/>
<xsl:param name="sortkey" select="''"/>
<xsl:param name="sortorder" select="''"/>
...
<xsl:apply-templates select="$selection">
<xsl:sort select="@*[name()=$sortkey]"
order="descending"/>
</xsl:apply-templates>
..>
</xsl:template>
this is untested but it might work. the select will look for the
attribute named $sortkey and use that in the sort.
-----Original Message-----
From: owner-xsl-list@lists.mulberrytech.com
[mailto:owner-xsl-list@lists.mulberrytech.com] On Behalf Of Neale
Morison
Sent: Friday, August 30, 2002 5:04 AM
To: xsl-list@lists.mulberrytech.com
Subject: RE: [xsl] Parametrized xsl:sort
> -----Original Message-----
> From: owner-xsl-list@lists.mulberrytech.com
> [mailto:owner-xsl-list@lists.mulberrytech.com]On Behalf Of Peter Davis
> Sent: Friday, 30 August 2002 12:57 PM
> To: xsl-list@lists.mulberrytech.com
> Subject: Re: [xsl] Parametrized xsl:sort
>
>
> On Thursday 29 August 2002 19:15, Neale Morison wrote:
> > To be specific, I want the result of:
> > <xsl:sort select="$sortkey" order="descending"/>
>
> Since a normal variable doesn't change, the sort will have no effect
> (but I'm sure you already figured this out).
>
> > with parameter sortkey:
> > <xsl:with-param name="sortkey" select="@name"/>
>
> If you pass select="@name", it will evaluate "@name" in the context of
> the with-param, not in the sort. So you probably want to change this
> to:
>
> <xsl:with-param name="sortkey" select="'@name'"/>
>
> which will pass the string '@name' to be evaluated later.
>
> > to be equivalent to:
> > <xsl:sort select="@name" order="descending"/>
>
> To evaluate the string, you need to use some kind of extension
> function. Look in the documentation of whatever processor you use; it
> will probably look
> like:
>
> <xsl:sort order="descending" select="xxx:evaluate($sortkey)"/>
>
> The 'xxx' will be associated with an extension namespace specific to
> your processor. The evaluate() function will take the string $sortkey
> and evaluate it as an XPath expression.
>
> --
> Peter Davis
>
> XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
Thanks. I thought I might be able to do it without an eval, but the eval
method does work. Regards, Neale
XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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