Sometimes you want to retrieve all the filters that one action supports, and you can do that via the following code snippet. Hope this helps.

Code Snippet
  1.          Collection<FilterInfo> filterInfoCollection = action.GetFilterPipeline(); // here action is action descriptor
  2.  
  3.          foreach (FilterInfo filterInfo in filterInfoCollection)
  4.          {
  5.              if (filterInfo.Instance is MyQueryableAttribute)
  6.              {
  7.                   supportQueryable = true;
  8.                   break;
  9.              }
  10.          }