Class: Class

Inherits:
Object show all
Defined in:
lib/stub_requests/core_ext/class/attribute.rb

Overview

:nodoc:

Instance Method Summary collapse

Instance Method Details

#class_attribute(*attrs) ⇒ Object

:nodoc:



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# File 'lib/stub_requests/core_ext/class/attribute.rb', line 6

def class_attribute(*attrs)
  options       = attrs.extract_options!
  default_value = options.fetch(:default, nil)

  attrs.each do |name|
    singleton_class.silence_redefinition_of_method(name)
    define_singleton_method(name) { nil }

    singleton_class.silence_redefinition_of_method("#{name}?")
    define_singleton_method("#{name}?") { !!public_send(name) }

    ivar = "@#{name}"

    singleton_class.silence_redefinition_of_method("#{name}=")
    define_singleton_method("#{name}=") do |val|
      singleton_class.class_eval do
        redefine_method(name) { val }
      end

      if singleton_class?
        class_eval do
          redefine_method(name) do
            if instance_variable_defined? ivar
              instance_variable_get ivar
            else
              singleton_class.send name
            end
          end
        end
      end
      val
    end

    redefine_method(name) do
      if instance_variable_defined?(ivar)
        instance_variable_get ivar
      else
        self.class.public_send name
      end
    end

    redefine_method("#{name}?") { !!public_send(name) }

    redefine_method("#{name}=") do |val|
      instance_variable_set ivar, val
    end

    unless default_value.nil?
      self.send("#{name}=", default_value)
    end
  end
end