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# frozen_string_literal: true |
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require_relative '../concrete' |
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require_relative '../../path/segment' |
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require_relative '../../mixin/errors' |
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require_relative 'pair_type' |
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require_relative '../aux/pair' |
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module AMA |
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module Entity |
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class Mapper |
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class Type |
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module Hardwired |
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# Predefined type for Hash class |
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class HashType < Concrete |
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include Mixin::Errors |
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def initialize |
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super(::Hash) |
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define_attribute |
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define_enumerator |
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define_acceptor |
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define_extractor |
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define_normalizer |
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define_denormalizer |
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end |
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private |
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def define_attribute |
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type = PairType.new |
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type = type.resolve( |
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type.parameter!(:L) => parameter!(:K), |
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type.parameter!(:R) => parameter!(:V) |
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) |
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attribute!(:_tuple, type, virtual: true) |
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end |
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def define_acceptor |
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acceptor_factory = lambda do |entity, *| |
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acceptor = Object.new |
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acceptor.define_singleton_method(:accept) do |_, tuple, *| |
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entity[tuple.left] = tuple.right |
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end |
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acceptor |
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end |
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self.acceptor = acceptor_factory |
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end |
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def define_enumerator |
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self.enumerator = lambda do |entity, type, *| |
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::Enumerator.new do |yielder| |
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entity.each do |key, value| |
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tuple = Aux::Pair.new(left: key, right: value) |
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attribute = type.attributes[:_tuple] |
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yielder << [attribute, tuple, Path::Segment.index(key)] |
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end |
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end |
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end |
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end |
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def define_extractor |
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self.extractor = lambda do |source, type, context = nil, *| |
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source = source.to_h if source.respond_to?(:to_h) |
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unless source.is_a?(Hash) |
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message = "Expected to receive hash, #{source.class} received" |
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mapping_error(message, context: context) |
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end |
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::Enumerator.new do |yielder| |
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source.each do |key, value| |
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tuple = Aux::Pair.new(left: key, right: value) |
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attribute = type.attributes[:_tuple] |
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yielder << [attribute, tuple, Path::Segment.index(key)] |
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end |
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end |
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end |
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end |
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def define_denormalizer |
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self.denormalizer = lambda do |input, context, *| |
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input = input.to_h if input.respond_to?(:to_h) |
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return input.clone if input.is_a?(Hash) |
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message = "Expected to receive hash, #{input.class} received" |
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mapping_error(message, context: context) |
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end |
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end |
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def define_normalizer |
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self.normalizer = lambda do |entity, *| |
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entity.clone |
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end |
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end |
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INSTANCE = new |
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end |
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end |
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end |
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end |
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end |
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end |
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ama-team /
ruby-entity-mapper
