# File lib/sdb/sdb_interface.rb, line 82
    def initialize(aws_access_key_id=nil, aws_secret_access_key=nil, params={})
      @nil_rep = params[:nil_representation] ? params[:nil_representation] : DEFAULT_NIL_REPRESENTATION
      params.delete(:nil_representation)
      init({:name             => 'SDB',
            :default_host     => ENV['SDB_URL'] ? URI.parse(ENV['SDB_URL']).host : DEFAULT_HOST,
            :default_port     => ENV['SDB_URL'] ? URI.parse(ENV['SDB_URL']).port : DEFAULT_PORT,
            :default_protocol => ENV['SDB_URL'] ? URI.parse(ENV['SDB_URL']).scheme : DEFAULT_PROTOCOL,
            :default_service  => ENV['SDB_URL'] ? URI.parse(ENV['SDB_URL']).path : DEFAULT_SERVICE},
           #             :service_endpoint => ENV['SDB_URL'] ? URI.parse(ENV['SDB_URL']).path   : DEFAULT_ENDPOINT },
           aws_access_key_id || ENV['AWS_ACCESS_KEY_ID'],
           aws_secret_access_key || ENV['AWS_SECRET_ACCESS_KEY'],
           params)
    end