# File lib/codec/mapping.rb, line 39
    def initialize(code, name, klasses = nil, getter = nil)

      @debug = (name == "bool")

      @code = code
      @name = name

      @@by_preferred ||= {}
      @@by_code ||= {}
      @@by_code["#{code}"] = self
      @@by_name ||= {}
      @@by_name[name] = self
      @@by_class ||= {}

      unless klasses.nil?
        klasses.each do |klass|
          raise "entry exists for #{klass}" if @@by_class.keys.include? klass
          @@by_class[klass] = self unless klass.nil?
        end
      end

      @put_method = (name + "=").intern

      if getter.nil?
        @get_method = name.intern
      else
        @get_method = getter.intern
      end
    end