Recently a coleague asked if it was possible to call java from XSL.

It is possible, and here is the example I provided.

<?xml version="1.0"?>
<xsl:stylesheet 
	version="1.0" 
	xmlns:xsl="http://www.w3.org/1999/XSL/Transform" 
	xmlns:getterUtil="xalan://com.liferay.portal.kernel.util.GetterUtil"
	xmlns:java="http://xml.apache.org/xalan/java"
	xmlns:userLocalServiceUtil="xalan://com.liferay.portal.service.UserLocalServiceUtil"
	exclude-result-prefixes="java" 
	extension-element-prefixes="getterUtil userLocalServiceUtil">

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

		<xsl:variable name="remote-user" select="/root/request/remote-user" />
		
		<xsl:text>Remote User: </xsl:text>
		<xsl:value-of select="$remote-user" />
		
		<div class="separator"><!--//--></div>
		
		<xsl:choose>
			<xsl:when test="$remote-user != ''">
				<xsl:variable name="user" select="userLocalServiceUtil:getUserById(getterUtil:getLong($remote-user))" />
	
				<xsl:text>Hello </xsl:text>
				<xsl:value-of select="java:getFullName($user)" />
				<xsl:text>!</xsl:text>
			</xsl:when>
			<xsl:otherwise>
				<xsl:text>Hello! Please log in.</xsl:text>
			</xsl:otherwise>
		</xsl:choose>

	</xsl:template>
</xsl:stylesheet>