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# Copyright 2011-2013 Amazon.com, Inc. or its affiliates. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"). You
# may not use this file except in compliance with the License. A copy of
# the License is located at
#
# http://aws.amazon.com/apache2.0/
#
# or in the "license" file accompanying this file. This file is
# distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF
# ANY KIND, either express or implied. See the License for the specific
# language governing permissions and limitations under the License.
module AWS
class S3
# Represents a part of a multipart upload that has been uploaded
# to S3.
#
# @example Get the total size of the uploaded parts
# upload.parts.inject(0) { |sum, part| sum + part.size }
class UploadedPart
include Core::Model
# @return [MultipartUpload] The upload to which this belongs.
attr_reader :upload
# @return [Integer] The part number.
attr_reader :part_number
# @api private
def initialize(upload, part_number, opts = {})
@upload = upload
@part_number = part_number
@etag = opts[:etag]
super
end
def ==(other)
other.kind_of?(UploadedPart) and
other.upload == upload and
other.part_number == part_number
end
alias_method :eql?, :==
# @return [Integer] The size of the part as it currently
# exists in S3.
def size
get_attribute(:size)
end
# @return [DateTime] The time at which the part was last
# modified.
def last_modified
get_attribute(:last_modified)
end
# @return [String] The ETag of the part.
def etag
@etag ||= get_attribute(:etag)
@etag
end
# @api private
private
def get_attribute(name)
(resp = client.list_parts(:bucket_name => upload.object.bucket.name,
:key => upload.object.key,
:upload_id => upload.id,
:part_number_marker => part_number-1,
:max_parts => 1) and
part = resp.parts.first and
part.part_number == part_number and
part.send(name)) or
raise "part #{part_number} of upload #{upload.id} does not exist"
end
end
end
end
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