path = "web-app/filter-mapping";
dig.addCallMethod(path, "addFilterMapping", 3);
dig.addCallParam(path + "/filter-name", 0);
dig.addCallParam(path + "/url-pattern", 1);
dig.addCallParam(path + "/servlet-name", 2);
dig.push(this);
try {
dig.parse(webXml);
this.setFilterName(filterName, context);
this.findFacesServlet(context);
// Store Instance to context attribute.