Java/XSLT Problem: Cannot find a matching 1-argument

Question

I get the following error:

javax.servlet.ServletException: Cannot find a matching 1-argument function named {http://exslt.org/dynamic}evaluate()
at org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:841)
at org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:774)

The top of my xslt file is

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0"   xmlns:dyn="http://exslt.org/dynamic" extension-element-prefixes="dyn">

Do you know why I may be getting this error?

UPDATE

The top of my XML file now reads.

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0" xmlns:xalan="http://xml.apache.org/xalan" exclude-result-prefixes="xalan">

and the XML where we are failing is

<xsl:template name="test">
  <xsl:param name="param" />
  <xsl:value-of select="$param"/>
  <xsl:value-of select="xalan:evaluate($param)"/>
</xsl:template>

This codes works on one server running Tomcat 5.0 but is not working on a server running Tomcat 5.5. I imagine because the code is working on one server and not it is an environmental problem.

The XSLT is being applied to the XML via a JSP page. To me it looks like the xalan.jar file is not being used. The top of the JSP is:

<%@page import="javax.xml.transform.*"%>
<%@page import="javax.xml.transform.stream.*"%>
<%@page import="      java.security.Principal,
    java.net.URL, 
    java.net.URLConnection, 
    java.io.InputStream,
    java.io.InputStreamReader,
    java.io.Reader,
    java.io.BufferedReader,
    java.io.File,
    javax.xml.transform.*,
    javax.xml.transform.stream.*,
    javax.xml.transform.*,
    javax.xml.transform.stream.*"%>

Update The problem is that Saxon is being chosen as the XML parser. Saxon does not support this functionality. Removing the Saxon.jar fixes the problem.

Answer 1

Somewhere in your XSLT you're referring to a function named "{http://exslt.org/dynamic}evaluate()" and you're not giving it the number of arguments it expects.

Or... it's unable to find the extensions you're adding.

Answer 2

Chances are you might be using an older version of Xalan.

Try instead using the xalan:evaluate() extension.

Read more on this in this thread.

Answer 3

Dimitre would you change the

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0"   xmlns:dyn="http://exslt.org/dynamic" extension-element-prefixes="dyn">

Answer 4

Are you including the .jar files in your classpath?