Access control in ruby

access_control.rb

class A
  protected
  def protected_a
    puts "Protected A"
  end

  private
  def private_a
    puts "Private A"
  end
end

class B < A
  def call_protected_a
    protected_a
  end

  def call_protected_b
    protected_b
  end

  def call_private_a
    private_a
  end

  def call_private_b
    private_b
  end

  def call_protected_a_2
    self.protected_a
  end

  def call_protected_b_2
    self.protected_b
  end

  def call_private_a_2
    self.private_a
  end

  def call_private_b_2
    self.private_b
  end

  protected

  def protected_b
    puts "Protected B"
  end

  private

  def private_b
    puts "Private B"
  end
end