[xsl] xsl extension functions with Java Vectors and Xalan

Subject: [xsl] xsl extension functions with Java Vectors and Xalan
From: Mark.Spittle@xxxxxxx
Date: Wed, 17 May 2006 08:41:50 +0100
I have written some extension functions for an xsl style sheet

These are writtin in Java

One function takes a NodeList from the style sheet and does a bit of messing
around with databases and external tools and returns a Vector of objects of a
class that is defined inside the interface class.

The Methods are static methods on the class and the class is defined as a

Another template is used to interrogate each object in the vector and build up
the output accordinglu. It does this via a

<xsl:for-each select="mynamespace:my-function( node ) >
	<xsl:call-template name="xxxxxxxxxx">
		<xsl:with-param name="abc" select="."/>

<xsl:template name="xxxxxxxxxx">
	<xsl:param name="abc"/>
	<xsl:element name="Item" use-attribute-sets="Detail">
		<xsl:attribute name="yyy">
			<xsl:value-of select="mynamespace:my-second-function($abc)"/>

my-function takes a NodeSet and returns a Vector of items
my-second-funcction takes an item and returns a String

This all worked straight away using Saxon 8 xslt version 2.

You'd think that was enough but some people here think Xalan is a better
standard, and for the life of me I cant get it to work with Xalan.

The interface with strings and NodeSet all works fine and I can return the
Vector into a variable but I have totally failed to process the elements of
the vector.

The error message I get is

"SystemId Unknown; Line #0; Column #0; Can not convert #UNKNOWN
(java.util.Vector) to a NodeList!"

All suggestions (yes all) gratefully received


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