/**
  * Initializes a newly creted {@link SecFilterMapping} object which associates the default Shiro's
  * filter to the specified URL pattern.
  *
  * @param url the URL pattern which the default Shiro's filter is mapped to
  * @param defaultFilter the default Shiro's filter instance to be mapped
  */
 public DefaultSecFilterMapping(String url, DefaultFilter defaultFilter) {
   this(url, defaultFilter.toString());
 }