question: static public void useXalanXPathSupport ( ) throws Exception { Class . forName ( "org.apache.xpath.XPath" ) ; Class c = Class . forName ( "freemarker.ext.dom.XalanXPathSupport" ) ; synchronized ( STATIC_LOCK ) { xpathSupportClass = c ; } if ( LOG . isDebugEnabled ( ) ) { LOG . debug ( "Using Xalan classes for XPath support" ) ; } }
target:  Convenience method. Tells the system to use Xalan for XPath queries.