require 'singleton'
require 'multi_json/options'
module MultiJson
class Adapter
extend Options
include Singleton
class << self
def defaults(action, value)
metaclass = class << self; self; end
metaclass.instance_eval do
define_method("default_#{action}_options"){ value }
end
end
def load(string, options={})
raise self::ParseError if blank?(string)
instance.load(string, collect_load_options(options).clone)
end
def dump(object, options={})
instance.dump(object, collect_dump_options(options).clone)
end
protected
def collect_load_options(options)
cache('load', options){ collect_options(:load_options, options).merge(options) }
end
def collect_dump_options(options)
cache('dump', options){ collect_options(:dump_options, options).merge(options) }
end
def collect_options(method, *args)
global, local = *[MultiJson, self].map{ |r| r.send(method, *args) }
local.merge(global)
end
def cache(method, options)
cache_key = [self, options].map(&:hash).join + method
MultiJson.cached_options[cache_key] ||= yield
end
private
def blank?(input)
input.nil? || /\A\s*\z/ === input
rescue ArgumentError # invalid byte sequence in UTF-8
false
end
end
end
end