jwaldrip/memory_model

module MemoryModel

  class InvalidFieldError < Error

    def initialize(name)
      super("`#{name}` is not a valid field")
    end

  end

  class ReadOnlyFieldError < Error

    def initialize(name)
      super("`#{name}` is read only")
    end

  end

  class Base
    module Fields
      class Field

        attr_reader :name, :options

        def initialize(name, options={})
          @name    = name.to_sym
          @options = options.reverse_merge!({ readonly: false, comparable: true })
        end

        def ==(other_object)
          self.to_sym == other_object.to_sym
        end

        def comparable?
          !!@options[:comparable]
        end

        def default
          @options[:default]
        end

        def readonly?
          !!@options[:readonly]
        end

        def to_sym
          @name.to_sym
        end

        def to_s
          @name.to_s
        end

      end
    end
  end
end