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303 lines
8.8 KiB
PHP
303 lines
8.8 KiB
PHP
<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\Component\Cache\Adapter;
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use Psr\Cache\CacheItemInterface;
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use Psr\Cache\CacheItemPoolInterface;
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use Symfony\Component\Cache\CacheItem;
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use Symfony\Component\Cache\Exception\InvalidArgumentException;
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use Symfony\Component\Cache\PruneableInterface;
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use Symfony\Component\Cache\ResettableInterface;
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use Symfony\Component\Cache\Traits\PhpArrayTrait;
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/**
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* Caches items at warm up time using a PHP array that is stored in shared memory by OPCache since PHP 7.0.
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* Warmed up items are read-only and run-time discovered items are cached using a fallback adapter.
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*
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* @author Titouan Galopin <galopintitouan@gmail.com>
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* @author Nicolas Grekas <p@tchwork.com>
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*/
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class PhpArrayAdapter implements AdapterInterface, PruneableInterface, ResettableInterface
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{
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use PhpArrayTrait;
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private $createCacheItem;
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/**
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* @param string $file The PHP file were values are cached
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* @param AdapterInterface $fallbackPool A pool to fallback on when an item is not hit
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*/
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public function __construct($file, AdapterInterface $fallbackPool)
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{
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$this->file = $file;
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$this->pool = $fallbackPool;
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$this->zendDetectUnicode = ini_get('zend.detect_unicode');
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$this->createCacheItem = \Closure::bind(
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function ($key, $value, $isHit) {
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$item = new CacheItem();
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$item->key = $key;
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$item->value = $value;
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$item->isHit = $isHit;
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return $item;
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},
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null,
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CacheItem::class
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);
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}
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/**
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* This adapter should only be used on PHP 7.0+ to take advantage of how PHP
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* stores arrays in its latest versions. This factory method decorates the given
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* fallback pool with this adapter only if the current PHP version is supported.
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*
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* @param string $file The PHP file were values are cached
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* @param CacheItemPoolInterface $fallbackPool Fallback for old PHP versions or opcache disabled
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*
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* @return CacheItemPoolInterface
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*/
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public static function create($file, CacheItemPoolInterface $fallbackPool)
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{
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// Shared memory is available in PHP 7.0+ with OPCache enabled and in HHVM
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if ((\PHP_VERSION_ID >= 70000 && ini_get('opcache.enable')) || defined('HHVM_VERSION')) {
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if (!$fallbackPool instanceof AdapterInterface) {
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$fallbackPool = new ProxyAdapter($fallbackPool);
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}
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return new static($file, $fallbackPool);
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}
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return $fallbackPool;
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}
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/**
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* {@inheritdoc}
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*/
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public function getItem($key)
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{
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if (!is_string($key)) {
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throw new InvalidArgumentException(sprintf('Cache key must be string, "%s" given.', is_object($key) ? get_class($key) : gettype($key)));
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}
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if (null === $this->values) {
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$this->initialize();
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}
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if (!isset($this->values[$key])) {
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return $this->pool->getItem($key);
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}
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$value = $this->values[$key];
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$isHit = true;
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if ('N;' === $value) {
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$value = null;
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} elseif (is_string($value) && isset($value[2]) && ':' === $value[1]) {
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try {
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$e = null;
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$value = unserialize($value);
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} catch (\Error $e) {
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} catch (\Exception $e) {
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}
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if (null !== $e) {
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$value = null;
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$isHit = false;
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}
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}
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$f = $this->createCacheItem;
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return $f($key, $value, $isHit);
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}
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/**
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* {@inheritdoc}
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*/
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public function getItems(array $keys = array())
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{
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foreach ($keys as $key) {
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if (!is_string($key)) {
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throw new InvalidArgumentException(sprintf('Cache key must be string, "%s" given.', is_object($key) ? get_class($key) : gettype($key)));
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}
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}
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if (null === $this->values) {
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$this->initialize();
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}
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return $this->generateItems($keys);
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}
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/**
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* {@inheritdoc}
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*/
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public function hasItem($key)
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{
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if (!is_string($key)) {
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throw new InvalidArgumentException(sprintf('Cache key must be string, "%s" given.', is_object($key) ? get_class($key) : gettype($key)));
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}
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if (null === $this->values) {
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$this->initialize();
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}
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return isset($this->values[$key]) || $this->pool->hasItem($key);
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}
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/**
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* {@inheritdoc}
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*/
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public function deleteItem($key)
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{
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if (!is_string($key)) {
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throw new InvalidArgumentException(sprintf('Cache key must be string, "%s" given.', is_object($key) ? get_class($key) : gettype($key)));
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}
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if (null === $this->values) {
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$this->initialize();
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}
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return !isset($this->values[$key]) && $this->pool->deleteItem($key);
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}
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/**
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* {@inheritdoc}
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*/
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public function deleteItems(array $keys)
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{
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$deleted = true;
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$fallbackKeys = array();
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foreach ($keys as $key) {
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if (!is_string($key)) {
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throw new InvalidArgumentException(sprintf('Cache key must be string, "%s" given.', is_object($key) ? get_class($key) : gettype($key)));
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}
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if (isset($this->values[$key])) {
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$deleted = false;
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} else {
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$fallbackKeys[] = $key;
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}
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}
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if (null === $this->values) {
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$this->initialize();
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}
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if ($fallbackKeys) {
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$deleted = $this->pool->deleteItems($fallbackKeys) && $deleted;
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}
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return $deleted;
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}
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/**
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* {@inheritdoc}
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*/
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public function save(CacheItemInterface $item)
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{
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if (null === $this->values) {
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$this->initialize();
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}
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return !isset($this->values[$item->getKey()]) && $this->pool->save($item);
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}
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/**
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* {@inheritdoc}
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*/
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public function saveDeferred(CacheItemInterface $item)
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{
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if (null === $this->values) {
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$this->initialize();
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}
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return !isset($this->values[$item->getKey()]) && $this->pool->saveDeferred($item);
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}
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/**
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* {@inheritdoc}
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*/
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public function commit()
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{
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return $this->pool->commit();
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}
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/**
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* @return \Generator
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*/
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private function generateItems(array $keys)
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{
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$f = $this->createCacheItem;
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$fallbackKeys = array();
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foreach ($keys as $key) {
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if (isset($this->values[$key])) {
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$value = $this->values[$key];
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if ('N;' === $value) {
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yield $key => $f($key, null, true);
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} elseif (is_string($value) && isset($value[2]) && ':' === $value[1]) {
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try {
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yield $key => $f($key, unserialize($value), true);
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} catch (\Error $e) {
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yield $key => $f($key, null, false);
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} catch (\Exception $e) {
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yield $key => $f($key, null, false);
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}
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} else {
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yield $key => $f($key, $value, true);
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}
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} else {
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$fallbackKeys[] = $key;
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}
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}
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if ($fallbackKeys) {
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foreach ($this->pool->getItems($fallbackKeys) as $key => $item) {
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yield $key => $item;
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}
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}
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}
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/**
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* @throws \ReflectionException When $class is not found and is required
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*
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* @internal
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*/
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public static function throwOnRequiredClass($class)
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{
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$e = new \ReflectionException("Class $class does not exist");
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$trace = $e->getTrace();
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$autoloadFrame = array(
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'function' => 'spl_autoload_call',
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'args' => array($class),
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);
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$i = 1 + array_search($autoloadFrame, $trace, true);
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if (isset($trace[$i]['function']) && !isset($trace[$i]['class'])) {
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switch ($trace[$i]['function']) {
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case 'get_class_methods':
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case 'get_class_vars':
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case 'get_parent_class':
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case 'is_a':
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case 'is_subclass_of':
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case 'class_exists':
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case 'class_implements':
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case 'class_parents':
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case 'trait_exists':
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case 'defined':
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case 'interface_exists':
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case 'method_exists':
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case 'property_exists':
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case 'is_callable':
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return;
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}
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}
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throw $e;
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}
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}
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