ama-team / ruby-entity-mapper

require_relative '../../exception/mapping_error'

require_relative '../../../../lib/mapper/mixin/reflection'

module AMA

  module Entity

    class Mapper

      class Engine

        class Denormalizer

          # Denormalizer for non-standard objects not registered as entities

          class Object

            include ::AMA::Entity::Mapper::Mixin::Reflection

            include ::AMA::Entity::Mapper::Mixin::Errors

            # @param [Object] source

            # @param [AMA::Entity::Mapper::Engine::Context] context

            # @param [AMA::Entity::Mapper::Type::Concrete] target_type

            def denormalize(source, context, target_type)

              return source if source.is_a?(target_type.type)

              handler = compute_handler(target_type, context)

              return target_type.type.send(handler, source, context) if handler

              entity = target_type.factory.create(context, source)

              extractor = target_type.extractor(source)

              acceptor = target_type.acceptor(entity, context)

              extractor.each do |attribute, value, segment = nil|

                acceptor.accept(attribute, value, segment)

              end

              entity

            end

            private

            def compute_handler(target_type, context)

              handler = context.denormalization_method

              handler && target_type.type.respond_to?(handler) ? handler : nil

            end

          end

        end

      end

    end

  end

end