9.5/_backend_factory_8php_source.html

<?php

namespace ‪TYPO3\CMS\Rsaauth\Backend;


/*

 * This file is part of the TYPO3 CMS project.

 *

 * It is free software; you can redistribute it and/or modify it under

 * the terms of the GNU General Public License, either version 2

 * of the License, or any later version.

 *

 * For the full copyright and license information, please read the

 * LICENSE.txt file that was distributed with this source code.

 *

 * The TYPO3 project - inspiring people to share!

 */


class ‪BackendFactory

{

    protected static ‪$availableBackends = [

        PhpBackend::class,

        CommandLineBackend::class

    ];


    protected static ‪$initialized = false;


    protected static ‪$selectedBackend;


    public static function ‪getBackend()

    {

        if (!self::$initialized) {

            // Backend does not exist yet. Create it.

            foreach (self::$availableBackends as $backend) {

                $backendObject = \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance($backend);

                // Check that it is derived from the proper base class

                if ($backendObject instanceof ‪AbstractBackend) {

                    if ($backendObject->isAvailable()) {

                        // The backend is available, save it and stop the loop

                        self::$selectedBackend = $backendObject;

                        self::$initialized = true;

                        break;

                    }

                    // Attempt to force destruction of the object

                    unset($backendObject);

                }

            }

        }

        return ‪self::$selectedBackend;

    }

}