如何在Doctrine2 targetEntity映射中使用不同的命名空间类

namespace App\Entity\User;

use App\Entity\Profile\Profile;
use Doctrine\ORM\Mapping as ORM;

/**
 * @ORM\Entity
 */
class User
{
    /**
     * @ORM\Id
     * @ORM\GeneratedValue
     * @ORM\Column(type="integer")
     */
    private $id;

    /**
     * @ORM\OneToOne(targetEntity="App\Entity\Profile\Profile")
     */
    private $profile;
}

namespace App\Entity\User;

use App\Entity\Profile\Profile;
use Doctrine\ORM\Mapping as ORM;

/**
 * @ORM\Entity
 * @ORM\Table(name="user")
 */
class User
{
    // ...
}

namespace App\Entity\Profile;

use App\Entity\User\User;
use Doctrine\ORM\Mapping as ORM;

/**
 * @ORM\Entity
 * @ORM\Table(name="profile")
 */
class Profile
{
    // ...
}