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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.
require 'json'
require 'base64'
module AWS
module Core
module Options
# Given a hash of serialization rules, a JSONSerializer can convert
# a hash of request options into a JSON document. The request options
# are validated before returning JSON.
class JSONSerializer
# @param [Hash] rules A hash of option rules to validate against.
# @param [String,nil] payload_param
def initialize rules, payload_param
@payload_param = payload_param
@rules = @payload_param ? rules[@payload_param][:members] : rules
end
# @return [String] Returns the name of the API operation.
attr_reader :operation_name
# @return [String]
attr_reader :namespace
# @return [Hash]
attr_reader :rules
# @overload serialize!(request_options)
# @param [Hash] request_options A hash of already validated
# request options with normalized values.
# @return [String] Returns an string of the request parameters
# serialized into XML.
def serialize request_options
request_options = request_options[@payload_param] if @payload_param
data = normalize_keys(request_options, rules)
if rules.any?{|k,v| v[:location] == 'body' }
data = data.values.first
end
JSON.pretty_generate(data)
end
protected
def normalize_keys values, rules
values.inject({}) do |h,(k,v)|
child_rules = rules[k]
child_name = child_rules[:name] || Inflection.class_name(k.to_s)
h.merge(child_name => normalize_value(v, child_rules))
end
end
def normalize_value value, rules
case rules[:type]
when :hash then normalize_keys(value, rules[:members])
when :array then value.map{|v| normalize_value(v, rules[:members]) }
when :map
value.inject({}) do |h,(k,v)|
h.merge(k => normalize_value(v, rules[:members]))
end
when :blob then Base64.encode64(value.read).strip
else value
end
end
end
end
end
end
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