code: private boolean uriMatch(String requestURI, IFilterMapping fmInfo, DispatcherType dispatcherType) {
          boolean theyMatch = false;
  
          // determine what type of filter uri we have
          switch (fmInfo.getMappingType()) {
              case FMI_MAPPING_SINGLE_SLASH:
                  // default servlet mapping...if requestURI is "/", they match
                  if (requestURI.equals("/")) // 144908
                      theyMatch = true;
                  break;
  
              case FMI_MAPPING_PATH_MATCH:
                  // it's a path mapping...match string is already stripped
                  if (requestURI.startsWith(fmInfo.getUrlPattern() + "/") || requestURI.equals(fmInfo.getUrlPattern()))
                      theyMatch = true;
                  break;
  
              case FMI_MAPPING_EXTENSION_MATCH:
                  // it's an extension mapping...get the extension
                  String ext = fmInfo.getUrlPattern().substring(2);
  
                  // compare to any extension on the request uri
                  int index = requestURI.lastIndexOf('.');
  
                  if (index != -1)
                      if (ext.equals(requestURI.substring(index + 1)))
                          theyMatch = true;
                  break;
  
              case FMI_MAPPING_EXACT_MATCH:
                  // it's an exact match
                  if (requestURI.equals(fmInfo.getUrlPattern()))
                      theyMatch = true;
                  break;
              default:
                  // should never happen...give a message?
                  break;
          }
  
          // Check if dispatch mode matches
          boolean dispMatch = false;
          if (theyMatch) {
              for (int i = 0; i < fmInfo.getDispatchMode().length; i++) {
                  if (dispatcherType == fmInfo.getDispatchMode()[i]) {
                      dispMatch = true;
                      break;
                  }
              }
          }
  
          return dispMatch && theyMatch;
      }
docs: Compares the request uri to the passed in filter uri to see if the filter
  associated with the filter uri should filter the request uri
  
  @param requestURI
  the request uri
  @param filterURI
  the uri associated with the filter
  
  @return boolean indicating whether the uri's match