public static int get() 
{
     
        // initialize the classes that can be searched for
        classMappings = new HashMap(6);
        classMappings.put("org.apache.jasper.runtime.JspFactoryImpl",             new Integer(TOMCAT));
        classMappings.put("com.caucho.jsp.JspServlet",                            new Integer(RESIN));
        classMappings.put("com.evermind.server.http.JSPServlet",                  new Integer(ORION));
        classMappings.put("weblogic.servlet.JSPServlet",                          new Integer(WEBLOGIC));
        classMappings.put("com.hp.mwlabs.j2ee.containers.servlet.jsp.JspServlet", new Integer(HPAS));
        classMappings.put("jrun.servlet.WebApplicationService",                   new Integer(JRUN));
        classMappings.put("com.ibm.ws.webcontainer.jsp.servlet.JspServlet",       new Integer(WEBSPHERE));
        if (result == -1) {
            final String classMatch = searchForClosestClass(classMappings);
            if (classMatch == null) {
                result = UNKNOWN;
            }
            else {
                result = ((Integer) classMappings.get(classMatch)).intValue();
            }
        }
        return result;
}

Get the current container.