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Contents
# frozen_string_literal: true
module Porridge
# {ChainSerializer} is a serializer that chains multiple other serializers together by passing the output of the
# first one as the input of the second, and the output of the second as the input of the third, and so on.
class ChainSerializer < Serializer
# Creates a new instance of {ChainSerializer} with the given serializers to chain.
# @param serializers [Array<Serializer,#call>] the splatted array of serializers to chain.
# @raise [InvalidSerializerError] if any of the given serializers are not valid serializers.
def initialize(*serializers)
super()
Serializer.ensure_valid!(*serializers)
@serializers = serializers
end
# Transforms the given input for the given object with the given options by chaining each serializer (contained in
# {#serializers}). The provided input will be given to the first serializer, whose output will be given to the next
# serializer, and so on for each serializer.
#
# The given object and options will be given to all the provided serializers. Note that the options are *not*
# cloned or duplicated. Therefore <b>none of the serializers should mutate the options object</b> or else
# all the other serializers will also receive the mutated version.
#
# @param object the object for which to transform the input.
# @param input the object being transformed, typically either a hash or an array.
# @param options [Hash] a hash of "options," which may be application specific.
# @return the transformed output, typically either a hash or an array, as returned from the final chained
# serializer.
def call(object, input, options)
output = input
serializers.each { |serializer| output = serializer.call(object, output, options) }
output
end
private
# The array of chained serializers.
# @return [Array<Serializer, #call>]
attr_reader :serializers
end
end
Version data entries
5 entries across 5 versions & 1 rubygems