RE: XSLT Extension Functions

Why not use the xalan:evaluate() extension function instead?

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 
> Hushagen, Michael E.
> Sent: 12 September 2002 19:22
> To: 'XSL-List@xxxxxxxxxxxxxxxxxxxxxx'
> Subject:  XSLT Extension Functions
> 
> 
> Hi all!
> I recently entered the wonderful world of XSLT Extensions.  
> I'm converting an XSL stylesheet from a Microsoft environment 
> to a Java environment.  The stylesheet has several extension 
> functions defined such as this:
> 
>  <msxsl:script language="JScript" implements-prefix="local"><![CDATA[
> 		  function selectNodes(contextNodeList,path)
> 		  {
> 		    return contextNodeList.item(0).selectNodes(path);
> 	}
>  ]]></msxsl:script>
> 
> As you can see, it's using Jscript and is called during the 
> transformation process using MSXML.
> 
> I converted the functions to Java methods such as this:
> 
> public NodeList selectNodes(NodeList contextNodeList,String path) {   
> return XPathAPI.selectNodeList(contextNodeList.item(0), path); }
> 
> This Java function is called during the transformation 
> process using Xalan. These functions are called from inside 
> the XSL stylesheet like this: <xsl:variable name="vRoot" 
> select="/"/> <xsl:value-of 
> select="local:selectNodes($vRoot,'Xpath expression goes here')"/>
> 
> 
> My problem is this:
> The node list that is passed into these functions seem to be 
> of different types depending on what transformer/function 
> type is used.  The nodelist that is passed into my Java 
> function is a DTMNodeList which is a Xalan class.  The 
> nodelist that is passed into the Microsoft Jscript function 
> is a different, generic node list. This difference in types 
> is causing problems.  Does anybody know anything about 
> this??? Any help would be greatly appreciated.
> 
> Thanks!
>  -Mike H.
> 
> 
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