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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 'time'
require 'bigdecimal'
require 'base64'
module AWS
module Core
# @api private
class JSONResponseParser
def initialize rules
@rules = rules
end
def extract_data response
body = response.http_response.body
body = "{}" if [nil, ''].include?(body)
translate(JSON.load(body))
end
def simulate
{}
end
protected
# @param [Hash] values
# @param [Hash] rules
# @return [Hash]
def translate values, rules = @rules
rules.inject({}) do |data,(key,rule)|
if values.key?(key)
data.merge(rule[:sym] || key => translate_value(values[key], rule))
else
data
end
end
end
def translate_hash values, rules
translate(values, rules[:members])
end
def translate_map values, rules
values.inject({}) do |data,(key,value)|
data.merge(key => translate_value(value, rules[:members]))
end
end
def translate_value value, rule
case
when value.is_a?(Array) then value.map{|v| translate_value(v, rule) }
when rule[:type] == :hash then translate_hash(value, rule)
when rule[:type] == :map then translate_map(value, rule)
when rule[:type] == :blob then Base64.decode64(value)
when rule[:type] == :time then Time.at(value)
when rule[:type] == :big_decimal then BigDecimal.new(value)
else value
end
end
end
end
end
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