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148 lars 1 
<?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\HttpFoundation\Session;
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/**
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 * @author Nicolas Grekas <p@tchwork.com>
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 *
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 * @internal
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 */
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final class SessionBagProxy implements SessionBagInterface
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{
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    private SessionBagInterface $bag;
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    private array $data;
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    private ?int $usageIndex;
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    private ?\Closure $usageReporter;
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    public function __construct(SessionBagInterface $bag, array &$data, ?int &$usageIndex, ?callable $usageReporter)
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    {
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        $this->bag = $bag;
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        $this->data = &$data;
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        $this->usageIndex = &$usageIndex;
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        $this->usageReporter = null === $usageReporter ? null : $usageReporter(...);
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    }
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    public function getBag(): SessionBagInterface
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    {
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        ++$this->usageIndex;
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        if ($this->usageReporter && 0 <= $this->usageIndex) {
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            ($this->usageReporter)();
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        }
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        return $this->bag;
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    }
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    public function isEmpty(): bool
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    {
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        if (!isset($this->data[$this->bag->getStorageKey()])) {
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            return true;
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        }
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        ++$this->usageIndex;
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        if ($this->usageReporter && 0 <= $this->usageIndex) {
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            ($this->usageReporter)();
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        }
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        return empty($this->data[$this->bag->getStorageKey()]);
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    }
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    public function getName(): string
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    {
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        return $this->bag->getName();
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    }
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    public function initialize(array &$array): void
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    {
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        ++$this->usageIndex;
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        if ($this->usageReporter && 0 <= $this->usageIndex) {
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            ($this->usageReporter)();
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        }
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        $this->data[$this->bag->getStorageKey()] = &$array;
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        $this->bag->initialize($array);
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    }
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    public function getStorageKey(): string
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    {
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        return $this->bag->getStorageKey();
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    }
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    public function clear(): mixed
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    {
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        return $this->bag->clear();
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    }
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}