vendor/symfony/security-acl/Domain/SecurityIdentityRetrievalStrategy.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\Core\Authentication\Token\AnonymousToken;
use Symfony\Component\Security\Core\Authentication\Token\TokenInterface;
use Symfony\Component\Security\Acl\Model\SecurityIdentityRetrievalStrategyInterface;
use Symfony\Component\Security\Core\Authentication\AuthenticationTrustResolver;
use Symfony\Component\Security\Core\Role\RoleHierarchyInterface;
use Symfony\Component\Security\Core\Authorization\Voter\AuthenticatedVoter;

/**
 * Strategy for retrieving security identities.
 *
 * @author Johannes M. Schmitt <schmittjoh@gmail.com>
 */
class SecurityIdentityRetrievalStrategy implements SecurityIdentityRetrievalStrategyInterface
{
    private $roleHierarchy;
    private $authenticationTrustResolver;

    /**
     * Constructor.
     *
     * @param RoleHierarchyInterface      $roleHierarchy
     * @param AuthenticationTrustResolver $authenticationTrustResolver
     */
    public function __construct(RoleHierarchyInterface $roleHierarchy, AuthenticationTrustResolver $authenticationTrustResolver)
    {
        $this->roleHierarchy = $roleHierarchy;
        $this->authenticationTrustResolver = $authenticationTrustResolver;
    }

    /**
     * {@inheritdoc}
     */
    public function getSecurityIdentities(TokenInterface $token)
    {
        $sids = array();

        // add user security identity
        if (!$token instanceof AnonymousToken) {
            try {
                $sids[] = UserSecurityIdentity::fromToken($token);
            } catch (\InvalidArgumentException $e) {
                // ignore, user has no user security identity
            }
        }

        // add all reachable roles
        foreach ($this->roleHierarchy->getReachableRoles($token->getRoles()) as $role) {