OrderProcessor class after refactoring.

OrderProcessor_Refactored.php

<?php

class OrderProcessor
{
    public function __construct(array $validators, OrderNotificationInterface $notification) {
        $this->$validators  = $validators;
        $this->notification = $notification;
    }

    public function process(Order $order)
    {
        foreach ($this->validators as $validator) {
            $validator->validate($order);
        }

        $order->update();

        $this->notification->notify($order);
    }
}