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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 XML
# This class takes the rules from an XML parser and then
# returns a stubbed reponse. This response has placeholder
# values based on the grammar, e.g.
#
# * Lists are stubbed with empty arrays
# * Indexes become empty hashes
# * Numeric types are returned as 0
# * etc
#
# This is used primarily to help with the AWS.stub! utility.
#
class Stub
# @param [Hash] rules
def initialize rules
@rules = rules
end
# @return [Hash]
attr_reader :rules
# Returns a hash with stubbed values as if it had parsed
# an empty xml document.
# @return [Hash]
def simulate
if rules[:children]
data = stub_data_for(rules)
apply_empty_indexes(rules, data)
data
else
{}
end
end
# Returns a hash with stubbed values as if it had parsed
# an empty xml document.
# @param [Hash] rules An XML::Parser rule set.
# @return [Hash]
def self.simulate rules
stub = Stub.new(rules)
stub.simulate
end
protected
def stub_data_for rules, data = {}
rules[:children].each_pair do |name,child_rules|
# skip ignored elements
if child_rules[:ignore]
stub_data_for(child_rules, data) if child_rules[:children]
next
end
orig_data = data
if wrapper = child_rules[:wrap]
data[wrapper] ||= {}
data = data[wrapper]
end
ruby_name = child_rules[:rename] ||
Inflection.ruby_name(name.to_s).to_sym
if child_rules[:list]
data[ruby_name] = []
elsif child_rules[:map]
data[ruby_name] = {}
elsif child_rules[:children] and !child_rules[:children].empty?
data[ruby_name] = stub_data_for(child_rules)
else
data[ruby_name] = case child_rules[:type]
when :integer then 0
when :float then 0.0
when :time then Time.now
when :datetime then Date.parse(Time.now.to_s)
when :boolean then false
else nil
end
end
# restore data incase it was redirected for wrapping
data = orig_data
end
data
end
protected
def apply_empty_indexes rules, data
return unless rules[:children]
rules[:children].each_pair do |name,child_rules|
if index = child_rules[:index]
data[index[:name]] = {}
end
apply_empty_indexes(child_rules, data)
end
end
end
end
end
end
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