Question

I am copying an example from XSLT Cookbook: 2nd Edition (O’Reilly: Mangano, 2006) where Mangano creates a tree diagram with SVG. As a way to quickly test this code, I am simply transforming the XML using JSTL’s <x:transform/> tag, and running it in Jetty 6. The XSLT seems to be getting hung on calling java:java.lang.Math:max, saying:

ERROR: ‘Cannot find external method ‘max’ (must be public).’ FATAL ERROR: ‘Could not compile stylesheet’

The code that gives me the error is contained in here where ...Math:max(... is called:

<?xml version='1.0' encoding='UTF-8'?> <xsl:stylesheet version='1.1'                 xmlns:emath='http://www.exslt.org/math'                 xmlns:xsl='http://www.w3.org/1999/XSL/Transform'                 xmlns:tree='http://www.ora.com/XSLTCookboox/ns/tree'                 xmlns:xalan='http://xml.apache.org/xslt'                 xmlns:Math='xalan:java.lang.Math'> ... <!--Pass 1 copies input with added bookkeeping attributes -->   <xsl:variable name='treeWithLayout'>   <xsl:apply-templates mode='layout'/> </xsl:variable>  <xsl:variable name='maxPos'        select='Math:max($treeWithLayout/*/@tree:WEIGHT *                         ($nodeWidth + $horzSpace),                        $treeWithLayout/*/@tree:MAXDEPTH *                           ($nodeHeight + $vertSpace))'/> ... 

Answer 1

I found this usage online:

<xsl:stylesheet version='1.0'    xmlns:xsl='http://www.w3.org/1999/XSL/Transform'   xmlns:math='xalan://java.lang.Math'   extension-element-prefixes='math'>