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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\Core;

use Symfony\Component\Security\Core\Authentication\Token\TokenInterface;

/**
 * The SecurityContextInterface.
 *
 * @author Johannes M. Schmitt <schmittjoh@gmail.com>
 */
interface SecurityContextInterface
{
    const ACCESS_DENIED_ERROR  = '_security.403_error';
    const AUTHENTICATION_ERROR = '_security.last_error';
    const LAST_USERNAME        = '_security.last_username';

    /**
     * Returns the current security token.
     *
     * @return TokenInterface|null A TokenInterface instance or null if no authentication information is available
     */
    public function getToken();

    /**
     * Sets the authentication token.
     *
     * @param TokenInterface $token A TokenInterface token, or null if no further authentication information should be stored
     */
    public function setToken(TokenInterface $token = null);

    /**
     * Checks if the attributes are granted against the current authentication token and optionally supplied object.
     *
     * @param mixed $attributes
     * @param mixed $object
     *
     * @return Boolean
     */
    public function isGranted($attributes, $object = null);
}