RE: [xsl] Passing variable number of parameters to xsl file

[Jarno dot Elovirta at nokia dot com]

Hi,

> Hi, I need to be able to support a variable number of 
> parameters.  I am
> currently using Xalan v2.2.
> 
> For example, the user would invoke Xalan with parameters:
>   
> 	-PARAM paramName1 paramValue1 -PARAM paramName2 paramValue2  ...
> -PARAM paramNameN paramValueN
> 	(specific example: -PARAM autobrand1 ford -PARAM 
> autobrand2 lexus
> -PARAM tire1 goodyear -PARAM tire2 michellan)
> 
> where N could be for example 1...500.

Err... are you going to have n number of top-level xsl:param elements? You might want to consider passing in a single param that contains the data in XML and then use Xalan extension to convert that into a node-set, or having a single param that contains the param as e.g comma separated list; or write the parameter data into a separate document and access that with document() function.

> 1) Is there a way to get the param count other than having it 
> passed in
> as something like: -PARAM numParams 500?

Well, count(document('')/xsl:stylesheet/xsl:param), but you might as well hard code it.

> 2) What I need to do is test a node's value against all of the
> parameter values passed in.  Note that for each invocation N could be:
> 0, 1, 2, ..500.
> 
> I want to do something like:
> 
> 	if (nodeValue match any of the paramValues of passed in)
> 	then
>   		doSomething();
> 	endif
> 
> for each parameter "family" (ex. autobrand and tire mentioned above)
> 
> without being forced to have a set of fixed static hardcoded test
> statements in the xsl like:
> 
> 	if (nodeValue match $paramName1)
> 		doSomething()
> 	else if  (nodeValue match $paramName2)
> 		doSomething()
> 		...
> 	else if (nodeValue match $paramNameN)
> 		doSomething()
> 	endif
> 
> where doSomething() is the exact same function for all
> nodeValue/paramValue matches.

If you're really going to have n number of xsl:params, then you have to hard code that, but if you pass a single param containing the data as XML or in some easy-to-parse text format, then it't pretty easy to write a recursive template.

Santtu

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