How to get filters from a Controller

application_controller.rb

# Add these methods to your ApplicationController. Then, any controller
# that inherits from it will have these methods and can programmatically
# determine what filters it has set.
class ApplicationController < ActionController::Base

  def self.filters(kind = :around)
    _process_action_callbacks.select{|f| f.kind == kind}.map(&:filter)
  end

  def self.before_filters
    filters(:before)
  end

  def self.after_filters
    filters(:after)
  end

  def self.around_filters
    filters(:around)
  end

end