class AWS::Record::Attributes::BooleanAttr

def self.allow_set?
  false
end

def self.serialize boolean, options = {}
  case boolean
  when false then 0
  when true  then 1
  else
    msg = "expected a boolean value, got #{boolean.class}"
    raise ArgumentError, msg
  end
end

def self.type_cast raw_value, options = {}
  case raw_value
  when nil then nil
  when '' then nil
  when false, 'false', '0', 0 then false
  else true
  end
end