Hash with dot notations

with_dot_notation.rb

class HashWithDotNotation < Hash

  def initialize(constructor = {})
    if constructor.is_a?(Hash)
      super()
      self.replace(constructor)
    else
      super(constructor)
    end
  end

  def method_missing_with_dot_notation_lookup(*args)
    if self.has_key?(args[0])
      rvalue = self.fetch(args[0])
      rvalue = rvalue.with_dot_notation if rvalue.is_a?(Hash)
      rvalue.map!{|e| e.is_a?(Hash) ? e.with_dot_notation : e } if rvalue.is_a?(Array)
      
      rvalue
    else
      self.method_missing_with_out_dot_notation_lookup(*args)
    end
  end
  
  alias_method_chain :method_missing, :dot_notation_lookup
end


class Hash #:nodoc:
  
  def with_dot_notation
    hash = HashWithDotNotation.new(self)
    hash.default = self.default
    hash
  end
  
  def with_dot_notation!
    self.replace self.with_dot_notation
  end
  
end