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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 'nokogiri'
module AWS
module Core
module Options
# Given a hash of serialization rules, an XMLSerializer can convert
# a hash of request options into XML. The request options are
# validated before returning XML.
class XMLSerializer
# @param [String] namespace
# @param [String] operation_name
# @param [Hash] operation
def initialize namespace, operation_name, operation
@namespace = namespace
@operation_name = operation_name
@rules = operation[:inputs]
@http = operation[:http]
@validator = Validator.new(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
# @return [Hash,nil]
attr_reader :http
# @return [Validator]
attr_reader :validator
# @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
if http && http[:request_payload]
payload = http[:request_payload]
root_node_name = rules[payload][:name]
params = request_options[payload]
rules = self.rules[payload][:members]
else
root_node_name = "#{operation_name}Request"
params = request_options
rules = self.rules
end
xml = Nokogiri::XML::Builder.new
xml.send(root_node_name, :xmlns => namespace) do |xml|
hash_members_xml(params, rules, xml)
end
xml.doc.root.to_xml
end
protected
def to_xml builder, opt_name, rules, value
xml_name = rules[:name]
xml_name ||= opt_name.is_a?(String) ?
opt_name : Inflection.class_name(opt_name.to_s)
case value
when Hash
builder.send(xml_name) do |builder|
hash_members_xml(value, rules[:members], builder)
end
when Array
builder.send(xml_name) do
value.each do |member_value|
to_xml(builder, 'member', rules[:members], member_value)
end
end
else builder.send(xml_name, value)
end
end
def hash_members_xml hash, rules, builder
xml_ordered_members(rules).each do |member_name|
if hash.key?(member_name)
value = hash[member_name]
to_xml(builder, member_name, rules[member_name], value)
end
end
end
def xml_ordered_members members
members.inject([]) do |list,(member_name, member)|
list << [member[:position] || 0, member_name]
end.sort_by(&:first).map(&:last)
end
end
end
end
end
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