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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
# A utility class to provide indifferent access to hash data.
#
# Inspired by ActiveSupport's HashWithIndifferentAccess, this class
# has a few notable differences:
#
# * ALL keys are converted to strings (via #to_s)
# * It does not deep merge/convert hashes indifferently, good for fla
# * It will not perserve default value behaviours
#
# These features were omitted because our primary use for this class is to
# wrap a 1-level hash as a return value, but we want the user to access
# the values with string or symbol keys.
#
# @api private
class IndifferentHash < Hash
def initialize *args
if args.first.is_a?(Hash)
super()
merge!(*args)
else
super(*args)
end
end
alias_method :_getter, :[]
alias_method :_setter, :[]=
def []=(key, value)
_setter(_convert_key(key), value)
end
alias_method :store, :[]=
def [] key
_getter(_convert_key(key))
end
def merge! hash
hash.each_pair do |key,value|
self[key] = value
end
self
end
alias_method :update, :merge!
def merge hash
self.dup.merge!(hash)
end
def has_key? key
super(_convert_key(key))
end
alias_method :key?, :has_key?
alias_method :member?, :has_key?
alias_method :include?, :has_key?
def fetch key, *extras, &block
super(_convert_key(key), *extras, &block)
end
def delete key
super(_convert_key(key))
end
private
def _convert_key key
key.is_a?(String) ? key : key.to_s
end
end
end
end
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