Doctrine Symfony2 Form Handler

DoctrineFormHandler.php

<?php

namespace Form\Handler;

use Symfony\Component\Form\Form;
use Symfony\Component\HttpFoundation\Request;
use Doctrine\Common\Persistence\ObjectManager;
use Form\Handler\FormHandlerInterface;

/**
 * Doctrine form handler for persisting doctrine objects
 *
 * Provides basic functionality of binding a request to a form, setting flash messages,
 * and persisting the form's underlying object. This class should be extended to override the
 * default functionality.
 *
 * @author Tyler Stroud <[email protected]>
 */
class DoctrineFormHandler implements FormHandlerInterface
{
    /**
     * @var Form
     */
    protected $form;

    /**
     * @var Request
     */
    protected $request;

    /**
     * @var ObjectManager
     */
    protected $om;

    /**
     * @var string
     */
    protected $requestMethod = 'POST';

    /**
     * @param Request       $request The request object
     * @param ObjectManager $om      The object manager
     * @param Form          $form    The form object
     */
    public function __construct(Request $request, ObjectManager $om, Form $form)
    {
        $this->form = $form;
        $this->request = $request;
        $this->om = $om;
    }

    /**
     * Set requestMethod
     *
     * @param string $method A valid HTTP method (for example, GET or POST)
     */
    public function setRequestMethod($method)
    {
        $this->requestMethod = $method;
    }

    /**
     * Process the form
     *
     * @param mixed $object An object mapped by Doctrine
     *
     * @throws \RuntimeException
     * @throws \InvalidArgumentException
     * @return bool
     */
    public function process($object)
    {
        if (false === is_object($object)) {
            throw new \InvalidArgumentException(sprintf('The process method\'s argument must be an object, "%s" given.', gettype($object)));
        }

        $this->form->setData($object);

        if ($this->requestMethod === $this->request->getMethod()) {
            $this->form->bindRequest($this->request);

            if ($this->form->isValid()) {
                $this->onSuccess($object);

                return true;
            }

            return false;
        }
    }

    /**
     * Called if the form validates successfully
     *
     * @param mixed $object
     */
    protected function onSuccess($object)
    {
        $this->om->persist($object);
        $this->om->flush();
    }
}