class AWS::SimpleDB::Attribute

def add *values
  put(values, false)
  nil
end

def delete *values
  expect_opts = values.pop if values.last.kind_of?(Hash)
  if values.empty?
    delete_named_attributes(name, expect_opts || {})
  else
    delete_attribute_values(Hash[[[name, values]]].
                            merge(expect_opts || {}))
  end
  nil
end

def each options = {}, &block
  resp = client.get_attributes(
    :domain_name => item.domain.name,
    :item_name => item.name,
    :attribute_names => [name],
    :consistent_read => consistent_read(options))
  resp.attributes.each do |attribute|
    yield(attribute.value)
  end
  nil
end

def initialize item, name, options = {}
  @item = item
  @name = name
  super
end

def put values, replace
  expect_opts = values.pop if values.last.kind_of?(Hash)
  do_put(attribute_hashes(Hash[[[name, values]]],
                          replace),
         expect_opts || {})
end

def set *values
  put(values, true)
  nil
end

def values options = {}
  values = []
  self.each(options) do |value|
    values << value
  end
  values
end