ClassInfoCache.php

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<?php
namespace TYPO3\CMS\Extbase\Object\Container;

class ClassInfoCache {

    private $level1Cache = array();

    private $level2Cache;

    public function __construct() {
        $this->initializeLevel2Cache();
    }

    public function has($id) {
        return isset($this->level1Cache[$id]) || $this->level2Cache->has($id);
    }

    public function get($id) {
        if (!isset($this->level1Cache[$id])) {
            $this->level1Cache[$id] = $this->level2Cache->get($id);
        }
        return $this->level1Cache[$id];
    }

    public function set($id, $value) {
        $this->level1Cache[$id] = $value;
        $this->level2Cache->set($id, $value);
    }

    private function initializeLevel2Cache() {
        $this->level2Cache = \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance('TYPO3\\CMS\\Core\\Cache\\CacheManager')->getCache('extbase_object');
    }
}