code: protected void initWebXmlElement(String element,XmlParser.Node node) throws Exception
      {
          if("display-name".equals(element))
              initDisplayName(node);
          else if("description".equals(element))
          {}
          else if("context-param".equals(element))
              initContextParam(node);
          else if("servlet".equals(element))
              initServlet(node);
          else if("servlet-mapping".equals(element))
              initServletMapping(node);
          else if("session-config".equals(element))
              initSessionConfig(node);
          else if("mime-mapping".equals(element))
              initMimeConfig(node);
          else if("welcome-file-list".equals(element))
              initWelcomeFileList(node);
          else if("locale-encoding-mapping-list".equals(element))
              initLocaleEncodingList(node);
          else if("error-page".equals(element))
              initErrorPage(node);
          else if("taglib".equals(element))
              initTagLib(node);
          else if("jsp-config".equals(element))
              initJspConfig(node);
          else if("resource-ref".equals(element))
          {
              if(log.isDebugEnabled())
                  log.debug("No implementation: "+node);
          }
          else if("security-constraint".equals(element))
              initSecurityConstraint(node);
          else if("login-config".equals(element))
              initLoginConfig(node);
          else if("security-role".equals(element))
              initSecurityRole(node);
          else if("filter".equals(element))
              initFilter(node);
          else if("filter-mapping".equals(element))
              initFilterMapping(node);
          else if("listener".equals(element))
              initListener(node);
          else if("distributable".equals(element))
              initDistributable(node);
          else
          {
              if(log.isDebugEnabled())
              {
                  log.debug("Element "+element+" not handled in "+this);
                  log.debug(node);
              }
          }
      }
docs: Handle web.xml element. This method is called for each top level element within the web.xml
  file. It may be specialized by derived WebApplicationContexts to provide additional
  configuration and handling.
  
  @param element The element name
  @param node The node containing the element.