# = The superclass / factory
class ServiceParser
  # We register adapters into this class variable
  #
  @@adapters = []

  # class reader
  #
  def self.adapters
    @@adapters
  end

  # Factory method here, se below...
  #
end

# = An example subclass / adapter
class FlickrAdapter < ServiceParser
  def initialize( url)

  end

  # API methods
  #
  def thumbnail
    # do something clever here...
  end

  # register ourselves with the Factory
  #
  ServiceParser.adapters << [self, /flickr\.com/]
end