active_call_stanza.rb

module Adhearsion
  module XMPP
    module API
      class ActiveCallStanza < ::Blather::XMPPNode
        NS = 'X-urn:xmpp:sip:active-calls'.freeze

        #
        # @param [Hash, nil] options child elements
        def self.new(options = {})
          new_node = super "active-call"
          options.each_pair do |key, value|
            o = "#{key.to_s}=".to_sym
            new_node.send o, value
          end
          new_node.namespace = NS
          new_node
        end
        
        # def dialog_state
        #   content_from "dialog-state"
        # end
        # 
        # def dialog_state=(value)
        #   set_content_for "dialog-state", value
        # end
        
        MEMBERS = %w{
          branch
          call-setup-id
        }
        
        # generate accessors
        MEMBERS.each do |member|
          define_method(member.sub('-', '_')) do
            content_from member
          end
        end
            
        # generate setters
        MEMBERS.each do |member|
          member_clean = member.sub('-', '_')
          define_method("#{member_clean}=(#{member_clean})") do
            set_content_for member, member_clean
          end
        end
    
      end
    end
  end
end

gistfile2.txt

>> class A
>> MEMBERS = %w{branch call-setup-id}
>> MEMBERS.each do |member|
?> member_clean = member.sub '-', '_'
>> self.class.send :define_method, "#{member_clean}=(#{member_clean})" do
?> set_content_for member, member_clean
>> end
>> end
>> end
=> ["branch", "call-setup-id"]