IllegalAccessException when using Java in XSLT

[Wout Neirynck <wo...@ictportal.com>]

Hi all,

I've written a servlet that generates HTML using XML/XSLT.  The XSL pages 
are using extra parameters that are passed on by the servlet (the http 
request, the http response and the session).  But when I want to access 
these objects from within the XSL file using the Java extension stuff 
provided by Xalan, Tomcat always gives me an "IllegalAccessException".

The whole web-app works perfecly fine using the commercial web-container 
JRun, so I don't think the problem lies with the Java code.  It can't be a 
problem of the classes or their members not being public, since they're 
standard servlet classes, and they're perfectly accessible from within the 
servlet itself.

Some version numbers:
- Java JDK 1.3.1
- Tomcat 3.3a
- Xalan 2.1.0
- Windows NT 4.0

Here's a sample of the XSLT I'm using to access the session:

<?xml version="1.0" encoding="UTF-8"?>

<xsl:stylesheet version="1.0"
	xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
	xmlns:xalan="http://xml.apache.org/xslt"
	xmlns:java="http://xml.apache.org/xslt/java"
	exclude-result-prefixes="java">

<xsl:output method="html" omit-xml-declaration="yes"/>

<!-- The session, passed on by the servlet -->
<xsl:param name="session"/>

<xsl:template match="/">
	<!-- Set the "userId" attribute in the session -->
	<xsl:value-of select="java:setAttribute($session,'userId','some value')"/>
</xsl:template>

</xsl:stylesheet>

And a piece of the stack trace:
java.lang.IllegalAccessException
	at java.lang.reflect.Method.invoke(Native Method)
	at 
org.apache.xalan.extensions.ExtensionHandlerJavaPackage.callFunction(ExtensionHandlerJavaPackage.java:375)
	at 
org.apache.xalan.extensions.ExtensionsTable.extFunction(ExtensionsTable.java:253)
	at 
org.apache.xpath.functions.FuncExtFunction.execute(FuncExtFunction.java:141)
	at org.apache.xpath.XPath.execute(XPath.java:260)
	at org.apache.xalan.templates.ElemValueOf.execute(ElemValueOf.java:251)
	at 
org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2251)
	at 
org.apache.xalan.transformer.TransformerImpl.applyTemplateToNode(TransformerImpl.java:2134)
	at 
org.apache.xalan.transformer.TransformerImpl.transformNode(TransformerImpl.java:1246)
	at 
org.apache.xalan.transformer.TransformerImpl.transform(TransformerImpl.java:504)
	at 
org.apache.xalan.transformer.TransformerImpl.transform(TransformerImpl.java:1174)


Once again, the whole app works perfectly using JRun (same Java, same 
Xalan, etc...), so I don't think it's got to do with the XSLT or my 
servlet.  If anyone knows how to solve this problem, I'd appreciate it if 
they'd help me out!

Thanks in advance,
Wout Neirynck


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