[xsl] How to invoke java instance methods from xslt?

[Brad Cox <bcox at virtualschool dot edu>]

Could someone please provide the recipe for passing a java 
instance into xslt and then calling a method on that instance? 
I'm using xalan extensions but keep getting lost in the weedy 
syntax.

With this input

	<task ident="...">
		<page ident="...">Arbitrary xhtml</page>
		<page ident="...">Arbitrary xhtml</page>
		<page ident="...">Arbitrary xhtml</page>
		<page ident="...">Arbitrary xhtml</page>
		<page ident="...">Arbitrary xhtml</page>
		<page ident="...">Arbitrary xhtml</page>
	</task>

and this for launching xslt from java

	StringWriter sw = new StringWriter();
	TransformerFactory tFactory = TransformerFactory.newInstance();
	Transformer transformer = tFactory.newTransformer(new 
StreamSource(xslPath));
		transformer.setParameter("cache", this);
		transformer.transform(new StreamSource(xmlPath), new 
StreamResult(sw));

and this xslt. Cache is the java instance and addBody is one of 
its public methods.

<?xml version="1.0"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
                 xmlns:java="http://xml.apache.org/xslt/java";
                 version="1.0">

   <xsl:param name="cache"></xsl:param>

   <xsl:template match="/task">
     <xsl:apply-templates select="page"/>
   </xsl:template>

   <xsl:template match="page">
     <xsl:variable name="ident" select="string(@ident)"/>
     <xsl:variable name="body" select="text()"/>
     <xsl:param name="cache" select="java:$cache.addPage($ident, 
$body)"/>
     <xsl:value-of select="java:format($formatter, $date)"/>
   </xsl:template>

</xsl:stylesheet>

The match("page") clause is gibberish because where I'm getting lost.


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