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require 'hashie/mash'
module Interpol
# Hashie::Mash is awesome: it gives us dot/method-call syntax for a hash.
# This is perfect for dealing with structured JSON data.
# The downside is that Hashie::Mash responds to anything--it simply
# creates a new entry in the backing hash.
#
# DynamicStruct freezes a Hashie::Mash so that it no longer responds to
# everything. This is handy so that consumers of this gem can distinguish
# between a fat-fingered field, and a field that is set to nil.
module DynamicStruct
SAFE_METHOD_MISSING = ::Hashie::Mash.superclass.instance_method(:method_missing)
Mash = Class.new(::Hashie::Mash) do
undef sort
end
def self.new(*args)
Mash.new(*args).tap do |mash|
mash.extend(self)
end
end
def self.extended(mash)
recursively_extend(mash)
end
def self.recursively_extend(object)
case object
when Array
object.each { |v| recursively_extend(v) }
when Mash
object.extend(self) unless object.is_a?(self)
object.each { |_, v| recursively_extend(v) }
end
end
def method_missing(method_name, *args, &blk)
if key = method_name.to_s[/\A([^?=]*)[?=]?\z/, 1]
unless has_key?(key)
return safe_method_missing(method_name, *args, &blk)
end
end
super
end
private
def safe_method_missing(*args)
SAFE_METHOD_MISSING.bind(self).call(*args)
end
end
end
Version data entries
13 entries across 13 versions & 1 rubygems