Subject: Re: [xsl] strong typed variable with restriction ? From: Matthieu Ricaud-Dussarget <matthieu.ricaud@xxxxxxxxx> Date: Wed, 02 Feb 2011 16:59:48 +0100 |
Regards, Matthieu.
Hi Matthieu, I would question the use of function for this need. Since the input parameter has only 2 states ('foo' and 'bar'), perhaps an XSLT code fragment as follows should be sufficient (i.e this looks like a simple if-then-else kind of abstraction).
<xsl:choose> <xsl:when test="$foobar='foo'"> <xsl:copy-of select="igs:get-my-foo-item()" /> </xsl:when> <xsl:when test="$foobar='bar'"> <xsl:copy-of select="igs:get-my-bar-item()" /> </xsl:when> </xsl:choose>
I believe functions should normally be designed when input parameters have potentially numerous states (of-course there may be exceptions to this observation, but this appears to be commonsense module/function design principle to me).
On Wed, Feb 2, 2011 at 3:46 PM, Matthieu Ricaud-Dussarget <matthieu.ricaud@xxxxxxxxx> wrote:Hi all,
I have a xsl:function which : - must return a element() - has a string param "foobar".
I typed $foobar as xs:string but I'd like to restrict the possible values to "foo" or "bar". I know it's possible to define such a constrain in a xsd schema, but is there a way to do that in xpath2 ?
This typing is important because the returned element() is selected from a xsl:choose on $foobar value (with no otherwise) :
My code looks like : <xsl:function name="igs:get-css-rule" as="element()"> <xsl:param name="foobar" as="xs:string"/> <!--(foo|bar)--> <xsl:choose> <xsl:when test="$foobar='foo'"> <xsl:sequence select="igs:get-my-foo-item()"/> </xsl:when> <xsl:when test="$css='bar'"> <xsl:sequence select="igs:get-my-bar-item()"/> </xsl:when> </xsl:choose> </xsl:function>
And I get such a parsing error on my xslt : XTTE0570: Conditional expression: If none of the conditions is satisfied, an empty sequence will be returned, but this is not allowed [...]
Should I import my own schema to my xsl to define my special type derived from xs:string ?
Thanks for your advices,
Matthieu.
-- Matthieu Ricaud IGS-CP Service Livre numC)rique
-- Matthieu Ricaud IGS-CP Service Livre numC)rique
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