cache keys

//it requires reflection...how unfortunate.
    public List getKeys() {
      Cache cache = getCacheAdministrator().getCache();
      try {
        Field mapField = cache.getClass().getDeclaredField("cacheMap");
        mapField.setAccessible(true);
        LRUCache map = (LRUCache) mapField.get(cache);
        return new ArrayList(map.keySet());
      } catch (Exception e) {
        log.error(e);
        return new ArrayList();
      }
    }