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#
# Author:: Tim Hinderliter (<tim@opscode.com>)
# Copyright:: Copyright (c) 2010 Opscode, 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.
# Wrapper class for interacting with JSON.
require 'json'
require 'yajl'
class Chef
class JSONCompat
JSON_MAX_NESTING = 1000
JSON_CLASS = "json_class".freeze
class <<self
# See CHEF-1292/PL-538. Increase the max nesting for JSON, which defaults
# to 19, and isn't enough for some (for example, a Node within a Node)
# structures.
def opts_add_max_nesting(opts)
if opts.nil? || !opts.has_key?(:max_nesting)
opts = opts.nil? ? Hash.new : opts.clone
opts[:max_nesting] = JSON_MAX_NESTING
end
opts
end
# Just call the JSON gem's parse method with a modified :max_nesting field
def from_json(source, opts = {})
obj = ::Yajl::Parser.parse(source)
if opts[:create_additions].nil? || opts[:create_additions]
map_to_rb_obj(obj)
else
obj
end
end
def map_to_rb_obj(json_obj)
res = case json_obj
when Hash
mapped_hash = map_hash_to_rb_obj(json_obj)
if json_obj.has_key?(JSON_CLASS) && (class_to_inflate = class_for_json_class(json_obj[JSON_CLASS]))
class_to_inflate.json_create(mapped_hash)
else
mapped_hash
end
when Array
json_obj.map {|e| map_to_rb_obj(e) }
else
json_obj
end
res
end
def map_hash_to_rb_obj(json_hash)
mapped_hash = {}
json_hash.each do |key, value|
mapped_hash[key] = map_to_rb_obj(value)
end
mapped_hash
end
def to_json(obj, opts = nil)
obj.to_json(opts_add_max_nesting(opts))
end
def to_json_pretty(obj, opts = nil)
::JSON.pretty_generate(obj, opts_add_max_nesting(opts))
end
def class_for_json_class(json_class)
case json_class
when "Chef::ApiClient"
Chef::ApiClient
when "Chef::CookbookVersion"
Chef::CookbookVersion
when "Chef::DataBag"
Chef::DataBag
when "Chef::DataBagItem"
Chef::DataBagItem
when "Chef::Environment"
Chef::Environment
when "Chef::Node"
Chef::Node
when "Chef::Role"
Chef::Role
when "Chef::Sandbox"
false
when "Chef::Resource"
false
when "Chef::ResourceCollection"
Chef::ResourceCollection
else
raise ArgumentError, "Unsupported `json_class` type '#{json_class}'"
end
end
end
end
end
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