vendor/symfony/security-acl/Domain/UserSecurityIdentity.php

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<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Component\Security\Acl\Domain;

use Symfony\Component\Security\Acl\Model\SecurityIdentityInterface;
use Symfony\Component\Security\Acl\Util\ClassUtils;
use Symfony\Component\Security\Core\Authentication\Token\TokenInterface;
use Symfony\Component\Security\Core\User\UserInterface;

/**
 * A SecurityIdentity implementation used for actual users.
 *
 * @author Johannes M. Schmitt <schmittjoh@gmail.com>
 */
final class UserSecurityIdentity implements SecurityIdentityInterface
{
    private $username;
    private $class;

    /**
     * Constructor.
     *
     * @param string $username the username representation
     * @param string $class    the user's fully qualified class name
     *
     * @throws \InvalidArgumentException
     */
    public function __construct($username, $class)
    {
        if ('' === $username || null === $username) {
            throw new \InvalidArgumentException('$username must not be empty.');
        }
        if (empty($class)) {
            throw new \InvalidArgumentException('$class must not be empty.');
        }

        $this->username = (string) $username;
        $this->class = $class;
    }

    /**
     * Creates a user security identity from a UserInterface.
     *
     * @param UserInterface $user
     *
     * @return UserSecurityIdentity
     */
    public static function fromAccount(UserInterface $user)
    {
        return new self($user->getUsername(), ClassUtils::getRealClass($user));
    }