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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;
- /**
- * @author Titouan Galopin <galopintitouan@gmail.com>
- */
- class NullAdapter implements AdapterInterface
- {
- private $createCacheItem;
- public function __construct()
- {
- $this->createCacheItem = \Closure::bind(
- function ($key) {
- $item = new CacheItem();
- $item->key = $key;
- $item->isHit = false;
- return $item;
- },
- $this,
- CacheItem::class
- );
- }
- /**
- * {@inheritdoc}
- */
- public function getItem($key)
- {
- $f = $this->createCacheItem;
- return $f($key);
- }
- /**
- * {@inheritdoc}
- */
- public function getItems(array $keys = [])
- {
- return $this->generateItems($keys);
- }
- /**
- * {@inheritdoc}
- */
- public function hasItem($key)
- {
- return false;
- }
- /**
- * {@inheritdoc}
- */
- public function clear()
- {
- return true;
- }
- /**
- * {@inheritdoc}
- */
- public function deleteItem($key)
- {
- return true;
- }
- /**
- * {@inheritdoc}
- */
- public function deleteItems(array $keys)
- {
- return true;
- }
- /**
- * {@inheritdoc}
- */
- public function save(CacheItemInterface $item)
- {
- return false;
- }
- /**
- * {@inheritdoc}
- */
- public function saveDeferred(CacheItemInterface $item)
- {
- return false;
- }
- /**
- * {@inheritdoc}
- */
- public function commit()
- {
- return false;
- }
- private function generateItems(array $keys)
- {
- $f = $this->createCacheItem;
- foreach ($keys as $key) {
- yield $key => $f($key);
- }
- }
- }
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