Module: NiceJsonApi::Internal::Inflector

Defined in:
lib/nice_json_api/internal/inflector.rb

Overview

Stolen verbatim from ActiveSupport

Class Method Summary collapse

Class Method Details

.constantize(camel_cased_word) ⇒ Object

github.com/rails/rails/blob/master/activesupport/lib/active_support/inflector/methods.rb#L272 rubocop:disable all

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# File 'lib/nice_json_api/internal/inflector.rb', line 9

def self.constantize(camel_cased_word)
  names = camel_cased_word.split("::".freeze)

  # Trigger a built-in NameError exception including the ill-formed constant in the message.
  Object.const_get(camel_cased_word) if names.empty?

  # Remove the first blank element in case of '::ClassName' notation.
  names.shift if names.size > 1 && names.first.empty?

  names.inject(Object) do |constant, name|
    if constant == Object
      constant.const_get(name)
    else
      candidate = constant.const_get(name)
      next candidate if constant.const_defined?(name, false)
      next candidate unless Object.const_defined?(name)

      # Go down the ancestors to check if it is owned directly. The check
      # stops when we reach Object or the end of ancestors tree.
      constant = constant.ancestors.inject(constant) do |const, ancestor|
        break const    if ancestor == Object
        break ancestor if ancestor.const_defined?(name, false)
        const
      end

      # owner is in Object, so raise
      constant.const_get(name, false)
    end
  end
end