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Contents
#--
# Copyright:: Copyright 2016 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.
#
require_relative "../decorator"
class Chef
class Decorator
# Lazy wrapper to delay construction of an object until a method is
# called against the object.
#
# @example
#
# def foo
# puts "allocated"
# "value"
# end
#
# a = Chef::Decorator::Lazy.new { foo }
#
# puts "started"
# a
# puts "still lazy"
# puts a
#
# outputs:
#
# started
# still lazy
# allocated
# value
#
# @since 12.10.x
class Lazy < Decorator
def initialize(&block)
super
@block = block
end
def __getobj__
__setobj__(@block.call) unless defined?(@delegate_sd_obj)
super
end
end
end
end
Version data entries
31 entries across 31 versions & 1 rubygems