class Temple::Engine

def build_chain
  chain.map do |e|
    name, filter, option_filter, local_options = e
    case filter
    when Class
      filtered_options = Hash[*option_filter.select {|k| options.include?(k) }.map {|k| [k, options[k]] }.flatten]
      filter.new(Utils::ImmutableHash.new(local_options, filtered_options))
    when UnboundMethod
      filter.bind(self)
    else
      filter
    end
  end
end