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#--
# Copyright:: Copyright 2016-2017, Chef Software Inc.
# License:: Apache License, Version 2.0
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License 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.
#
class Chef
class Node
module Mixin
module ImmutablizeHash
DISALLOWED_MUTATOR_METHODS = [
:[]=,
:clear,
:collect!,
:default=,
:default_proc=,
:delete,
:delete_if,
:keep_if,
:map!,
:merge!,
:update,
:reject!,
:replace,
:select!,
:shift,
:write,
:write!,
:unlink,
:unlink!,
]
# Redefine all of the methods that mutate a Hash to raise an error when called.
# This is the magic that makes this object "Immutable"
DISALLOWED_MUTATOR_METHODS.each do |mutator_method_name|
define_method(mutator_method_name) do |*args, &block|
raise Exceptions::ImmutableAttributeModification
end
end
end
end
end
end
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