Symfony: Objectless Form

gistfile1

<?php
namespace Acme\DemoBundle\Form\Type;

use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilder;

use Symfony\Component\Validator\Constraints as Assert;

class DemoType extends AbstractType
{
    public function buildForm(FormBuilder $builder, array $options)
    {
        $builder->add('name');
        $builder->add('email', 'email', array('label' => 'Your Email'));
    }

    public function getName()
    {
        return 'demo';
    }
    public function getDefaultOptions(array $options)
    {
        $collectionConstraint = new Assert/Collection(array(
            'name' => new Assert/MinLength(5),
            'email' => new Assert/Email(array('message' => 'Invalid email address')),
        ));

        return array('validation_constraint' => $collectionConstraint);
    }
}