module AWS::S3::DataOptions

def validate_data! options, &block
  data = options[:data]
  file = options[:file]
  raise ArgumentError, 'Object data passed multiple ways.' if
    [data, file, block].compact.count > 1
  data = file if file
  return if block_given?
  return if data.kind_of?(String)
  return if data.kind_of?(Pathname)
  return if io_like?(data)
  msg = ":data must be provided as a String, Pathname, File, or "
  msg << "an object that responds to #read and #eof?"
  raise ArgumentError, msg
end