CacheFactory.php

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<?php
namespace TYPO3\CMS\Core\Cache;

/*
 * 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 CacheFactory implements \TYPO3\CMS\Core\SingletonInterface
{
    protected $context;

    protected $cacheManager;

    public function __construct($context, \TYPO3\CMS\Core\Cache\CacheManager $cacheManager)
    {
        $this->context = $context;
        $this->cacheManager = $cacheManager;
        $this->cacheManager->injectCacheFactory($this);
    }

    public function create($cacheIdentifier, $cacheObjectName, $backendObjectName, array $backendOptions = array())
    {
        // New operator used on purpose: This class is required early during
        // bootstrap before makeInstance() is propely set up
        $backendObjectName = '\\' . ltrim($backendObjectName, '\\');
        $backend = new $backendObjectName($this->context, $backendOptions);
        if (!$backend instanceof \TYPO3\CMS\Core\Cache\Backend\BackendInterface) {
            throw new \TYPO3\CMS\Core\Cache\Exception\InvalidBackendException('"' . $backendObjectName . '" is not a valid cache backend object.', 1216304301);
        }
        if (is_callable(array($backend, 'initializeObject'))) {
            $backend->initializeObject();
        }
        // New used on purpose, see comment above
        $cache = new $cacheObjectName($cacheIdentifier, $backend);
        if (!$cache instanceof \TYPO3\CMS\Core\Cache\Frontend\FrontendInterface) {
            throw new \TYPO3\CMS\Core\Cache\Exception\InvalidCacheException('"' . $cacheObjectName . '" is not a valid cache frontend object.', 1216304300);
        }
        if (is_callable(array($cache, 'initializeObject'))) {
            $cache->initializeObject();
        }
        $this->cacheManager->registerCache($cache);
        return $cache;
    }
}