Class: Jabara::Transformer::Flatten

Inherits:
Object
  • Object
show all
Defined in:
lib/jabara/transformer/flatten.rb

Overview

TODO array と set のflat化は別クラスに責務を切り出した方がいいかも

Instance Method Summary collapse

Constructor Details

#initialize(id_key_name: 'id', index_key_name: 'index') ⇒ Flatten 



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# File 'lib/jabara/transformer/flatten.rb', line 8

def initialize(id_key_name: 'id', index_key_name: 'index')
  @id_key_name = id_key_name
  @index_key_name = index_key_name
end

Instance Method Details

#convert(object_repr) ⇒ Object

与えられたオブジェクトを第1正規化する



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# File 'lib/jabara/transformer/flatten.rb', line 14

def convert(object_repr)
  new_repr_hash = {}
  divided_reprs = []

  id = ::Jabara.id(object_repr)
  ::Jabara.data(object_repr).each do |key, repr|
    data = ::Jabara.data(repr)
    if ::Jabara.primitive?(repr) then
      new_repr_hash[key] = repr
    else
      tag = ::Jabara.tag(repr)
      case tag
      when :object
        _object_repr = data
        ::Jabara.data(_object_repr)[@id_key_name] = id
        divided_reprs.push(_object_repr)
      when :array
        # TODO ヘテロな要素が来るケースへの対応
        # TODO primitiveな要素が来るケースへの対応

        ar = data
        ar.each_with_index do |_object_repr, index|
          ::Jabara.data(_object_repr)[@id_key_name] = id
          ::Jabara.data(_object_repr)[@index_key_name] = index
          divided_reprs.push(_object_repr)
        end
      when :set
        # TODO ヘテロな要素が来るケースへの対応
        # TODO primitiveな要素が来るケースへの対応

        st = data
        st.each do |_object_repr|
          ::Jabara.data(_object_repr)[@id_key_name] = id
          divided_reprs.push(_object_repr)
        end
      else
        raise ArgumentError, "Invalid tag was found :%s" % tag
      end
    end
  end

  ::Jabara.set_data(object_repr, new_repr_hash)
  return object_repr, divided_reprs
end