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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
module Core
module Collection
# # Collection::WithNextToken
#
# When making a request to list elements from one of these
# collections, the response may return a next token. This indicates
# there are more results than were returned. You can not control
# the number of elements returned with each response.
#
# See {AWS::Core::Collection} for documentation on the available
# collection methods.
#
module WithNextToken
include Model
include Enumerable
include Collection
protected
def _each_batch options = {}, &block
limit = _extract_limit(options)
next_token, skip_count = _extract_next_token(options)
skipped = 0
collected = 0
begin
offset = 0
batch = []
next_token = _each_item(next_token, options.dup) do |item|
if skipped < skip_count
skipped += 1
next
end
if limit
if collected < limit
batch << item
collected += 1
else
yield(batch)
simulated_next_token = {}
simulated_next_token[:token] = next_token if next_token
simulated_next_token[:offset] = offset + skipped
return simulated_next_token
end
else
batch << item
collected += 1
end
offset += 1
end # _each_item
yield(batch)
end until next_token.nil? or (limit and limit == collected)
next_token.nil? ? nil : { :token => next_token }
end
def _extract_next_token options
next_token = super
case next_token
when nil then [nil, 0]
when Hash then [next_token[:token], next_token[:offset] || 0]
else [next_token, 0]
end
end
end
end
end
end
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