Bir classı factory pattern olarak tanımlayıp örneğini almak - versiyon 1

04/08/2015 - SYMFONY

Bir classın örneğini sürekli manuel olarak yaratmak yerine, onu factory pattern niteliğinde kullanıp, otomatik olarak örneğini alabilirsiniz. Eğer class constructor ile parametre kabul ediyorsa, maalesef bu yöntem size dinamik olarak parametreleri değiştirme olanağı vermiyor.


Notification class


namespace Application\BackendBundle\Model\Notification;

class Notification
{
    private $param1;
    private $param2;
    private $title;

    public function __construct($param1, $param2)
    {
        $this->param1 = $param1;
        $this->param2 = $param2;
    }

    public function setTitle($title)
    {
        $this->title = $title . ' (' . $this->param1 . ' - ' . $this->param2 . ')';
    }

    public function getTitle()
    {
        return $this->title;
    }
}

Notification factory


namespace Application\BackendBundle\Factory;

use Application\BackendBundle\Model\Notification\Notification;

class NotificationFactory
{
    public static function createNotification($param1, $param2 = 'world')
    {
        $notification = new Notification($param1, $param2);

        return $notification;
    }
}

Factories.yml


services:
    application_backend.factory.notification:
        class:   Application\BackendBundle\Model\Notification\Notification
        factory: [Application\BackendBundle\Factory\NotificationFactory, createNotification]
        arguments:
            - hello

Controllers.yml


services:
    application_frontend.controller.default:
        class: Application\FrontendBundle\Controller\DefaultController
        arguments:
            - @application_backend.factory.notification

DefaultController.php


namespace Application\FrontendBundle\Controller;

use Application\BackendBundle\Model\Notification\Notification;

class DefaultController extends Controller
{
    private $notification;

    public function __construct(Notification $notification) {
        $this->notification = $notification;
    }

    public function indexAction()
    {
        var_dump($this->notification);
        $this->notification->setTitle('Say');
        echo $this->notification->getTitle();
        exit;
    }
}

Sonuç


object(Application\BackendBundle\Model\Notification\Notification)[299]
  private 'param1' => string 'hello' (length=5)
  private 'param2' => string 'world' (length=5)
  private 'title' => null

Say (hello - world)