Re: [xsl] Accessing attribute in a variable with conditional value

[Alan Arnfeld <aarnfeld@xxxxxxxxxxx>]

this helps me too - excellent
--- Wasiq Shaikh <wasiq911@xxxxxxxxxxx> wrote:

> Ah, I see! When I printed the variable it "looked"
> like a nodeset, so I 
> assumed I could access the elements and attributes
> within.
> 
> This is my working solution after applying Mukul's
> suggestion. Thanks Mukul!
> 
>       <xsl:variable name="validAttributeType">
>          <xsl:if test="key('allTypes', @type)">
>             <xsl:copy-of select="key('allTypes',
> @type)/xsd:restriction"/>
>          </xsl:if>
>          <xsl:if test="xsd:simpleType">
>             <xsl:copy-of
> select="xsd:simpleType/xsd:restriction"/>
>          </xsl:if>
>       </xsl:variable>
>       <xsl:if test="$validAttributeType!=''">
>          <xsl:element name="validValues">
>             <xsl:call-template name="trimAttribute">
>                <xsl:with-param name="attributeName"
> select="'base'"/>
>                <xsl:with-param name="attribute" 
>
select="xalan:nodeset($validAttributeType)/*/@base"/>
>             </xsl:call-template>
>             <xsl:for-each
> select="xalan:nodeset($validAttributeType)/*/*">
>                <xsl:element name="value">
>                   <xsl:attribute name="type">
>                      <xsl:value-of
> select="substring-after(name(), 
> 'xsd:')"/>
>                   </xsl:attribute>
>                   <xsl:value-of select="@value"/>
>                </xsl:element>
>             </xsl:for-each>
>          </xsl:element>
>       </xsl:if>
> 
> (using XalanJ 2.7/XPath 1.0)
> 
> 
> ----Original Message Follows----
> 
> The error you are getting at this line,
> <xsl:with-param
> name="attribute"
> select="$validAttributeType/@base"/>
> 
> is because the variable "validAttributeType" is a
> result tree fragment
> (it's a special data type defined in XSLT 1.0), and
> you are trying to
> apply an XPath operation to it; which is not
> correct.
> 
> To my opinion, you need to use an extension function
> node-set for this
> (if you are restricted to XSLT 1.0).
> 
> So for example, something like following will work:
> <xsl:with-param name="attribute"
>
select="xx:node-set($validAttributeType)/xsd:restriction/@base"/>
> 
> (please bind the prefix xx to the required namespace
> - please see the
> product documentation for this)
> 
> With XSLT 2.0, you will not get the error at all,
> for the operation
> you are trying to do (because XSLT 2.0 implicitly
> treats the contents
> of xsl:variable in this case as a node-set).
> 
> On 8/1/07, Wasiq Shaikh <wasiq911@xxxxxxxxxxx>
> wrote:
>  > Hi,
>  >
>  > I'm setting a value on a variable using
> conditions. The variable must be 
> a
>  > node-set so that I can do some processing with
> it.
>  >
>  >      <xsl:variable name="validAttributeType">
>  >         <xsl:if test="key('allTypes', @type)">
>  >            <xsl:copy-of select="key('allTypes',
> @type)/xsd:restriction"/>
>  >         </xsl:if>
>  >         <xsl:if test="xsd:simpleType"
>  >            <xsl:copy-of
> select="xsd:simpleType/xsd:restriction"/>
>  >         </xsl:if>
>  >      </xsl:variable>
>  >
>  > The "xsd:restriction" tag has a "base" attribute
> that I need to access 
> and
>  > send to a template as a parameter.
>  >
>  >            <xsl:call-template
> name="trimAttribute">
>  >               <xsl:with-param
> name="attributeName" select="'base'"/>
>  >               <xsl:with-param name="attribute"
>  > select="$validAttributeType/@base"/>
>  >            </xsl:call-template>
>  >
>  > But it gives me a "XSLT Error
> (javax.xml.transform.TransformerException):
>  > org.apache.xpath.objects.XRTreeFrag" when I try
> to do
>  >
>  > <xsl:with-param name="attribute"
> select="$validAttributeType/@base"/>
>  > OR
>  > <xsl:with-param name="attribute"><xsl:copy-of
>  >
>
select="$validAttributeType/@base"/></xsl:with-param>
>  >
>  > I can print out the variable's contents, which is
> correct, but I can't 
> seem
>  > to access the attribute. By the way, previously I
> had this
>  >
>  > <xsl:variable name="validAttributeType"
> select="key('allTypes',
>  > @type)/xsd:restriction"/>
>  >
>  > which works! But adding the conditional messed it
> up. How can I get the 
> same
>  > behaviour as the above line in a conditional
> variable?
>  >
>  > I appreciate any help. Thank you!
> 
> 
> --
> Regards,
> Mukul Gandhi
> 
>
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