Module: FIRM::Serializable::JSON::ContainerPatch

Included in:
Array, Hash, OpenStruct, Set, Struct
Defined in:
lib/firm/serializer/json.rb

Class Method Summary collapse

Class Method Details

.included(base) ⇒ Object 



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# File 'lib/firm/serializer/json.rb', line 56

def self.included(base)
  class << base
    def json_new(object, &block)
      # deserializing (anchor) object or alias
      if object.has_key?('*id')
        if FIRM::Serializable::Aliasing.restored?(self, object['*id'])
          # resolving an already restored anchor for this alias
          FIRM::Serializable::Aliasing.resolve_anchor(self, object['*id'])
        else
          # in case of cyclic references JSON will restore aliases before the anchors
          # so in this case we instantiate an instance here and register it as
          # the anchor; when the anchor is restored it will replace the contents of this
          # instance with the restored elements
          FIRM::Serializable::Aliasing.restore_anchor(object['*id'], self.new)
        end
      else
        instance = if object.has_key?('&id')
                     anchor_id = object['&id'] # extract anchor id
                     if FIRM::Serializable::Aliasing.restored?(self, anchor_id)
                       # in case of cyclic references an alias will already have restored the anchor instance
                       # (default constructed); retrieve that instance here for deserialization of properties
                       FIRM::Serializable::Aliasing.resolve_anchor(self, anchor_id)
                     else
                       # restore the anchor here with a newly instantiated instance
                       FIRM::Serializable::Aliasing.restore_anchor(anchor_id, self.new)
                     end
                   else
                     self.new
                   end
        block.call(instance)
        instance
      end
    end
    private :json_new
  end
end