From: "Iñaki Baz Castillo" <ibc@...>
Date: 2011-04-17T01:55:16+09:00
Subject: Re: Get the real object in a Hash key

2011/4/16 Robert Klemme <shortcutter@googlemail.com>:
>> I've coded a parser for SIP (similar to HTTP). The parser generates a
>> Request object which inherits from Hash,
>
> Usually it's better to use composition instead of inheritance to achieve
> this.  Now your SipRequest inherits *all* methods from Hash including some
> that you might not want users to be able to invoke.

Thanks to both. However the SIP parser is already done. I've coded it
at C level as a Ruby extension (similar to Mongrel HTTP parser which
returns a Hash instance). I can change it for generating a Hash object
rather than a custom SipRequest object, and then behave as both of you
suggest:

  class SipRequest
    def initialize(headers={})
      @headers = headers
    end
  end

I will consider it and also the suggested methods to handle header
names and values.

Thanks a lot.



-- 
Iñaki Baz Castillo
<ibc@aliax.net>