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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\Cache\Adapter; use Psr\Cache\CacheItemInterface; use Symfony\Component\Cache\CacheItem; use Symfony\Contracts\Cache\CacheInterface; /** * @author Titouan Galopin <galopintitouan@gmail.com> */ class NullAdapter implements AdapterInterface, CacheInterface { private $createCacheItem; public function __construct() { $this->createCacheItem = \Closure::bind( function ($key) { $item = new CacheItem(); $item->key = $key; $item->isHit = false; return $item; }, $this, CacheItem::class ); } /** * {@inheritdoc} */ public function get(string $key, callable $callback, float $beta = null, array &$metadata = null) { $save = true; return $callback(($this->createCacheItem)($key), $save); } /** * {@inheritdoc} */ public function getItem($key) { $f = $this->createCacheItem; return $f($key); } /** * {@inheritdoc} */ public function getItems(array $keys = []) { return $this->generateItems($keys); } /** * {@inheritdoc} * * @return bool */ public function hasItem($key) { return false; } /** * {@inheritdoc} * * @return bool */ public function clear(string $prefix = '') { return true; } /** * {@inheritdoc} * * @return bool */ public function deleteItem($key) { return true; } /** * {@inheritdoc} * * @return bool */ public function deleteItems(array $keys) { return true; } /** * {@inheritdoc} * * @return bool */ public function save(CacheItemInterface $item) { return false; } /** * {@inheritdoc} * * @return bool */ public function saveDeferred(CacheItemInterface $item) { return false; } /** * {@inheritdoc} * * @return bool */ public function commit() { return false; } /** * {@inheritdoc} */ public function delete(string $key): bool { return $this->deleteItem($key); } private function generateItems(array $keys) { $f = $this->createCacheItem; foreach ($keys as $key) { yield $key => $f($key); } } }