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