module AWS::S3::Client::Validators

def validate_parts!(parts)
  validate!("parts", parts) do
    if !parts.kind_of?(Array)
      "must not be blank"
    elsif parts.empty?
      "must contain at least one entry"
    elsif !parts.all? { |p| p.kind_of?(Hash) }
      "must be an array of hashes"
    elsif !parts.all? { |p| p[:part_number] }
      "must contain part_number for each part"
    elsif !parts.all? { |p| p[:etag] }
      "must contain etag for each part"
    elsif parts.any? { |p| p[:part_number].to_i < 1 }
      "must not have part numbers less than 1"
    end
  end
end