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3 liveuser 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\Attribute;
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/**
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 * This class relates to session attribute storage.
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 */
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class AttributeBag implements AttributeBagInterface, \IteratorAggregate, \Countable
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{
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    private $name = 'attributes';
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    private $storageKey;
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    protected $attributes = [];
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    /**
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     * @param string $storageKey The key used to store attributes in the session
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     */
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    public function __construct(string $storageKey = '_sf2_attributes')
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    {
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        $this->storageKey = $storageKey;
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    }
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    /**
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     * {@inheritdoc}
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     */
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    public function getName()
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    {
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        return $this->name;
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    }
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    public function setName(string $name)
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    {
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        $this->name = $name;
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    }
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    /**
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     * {@inheritdoc}
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     */
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    public function initialize(array &$attributes)
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    {
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        $this->attributes = &$attributes;
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    }
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    /**
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     * {@inheritdoc}
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     */
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    public function getStorageKey()
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    {
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        return $this->storageKey;
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    }
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    /**
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     * {@inheritdoc}
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     */
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    public function has(string $name)
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    {
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        return \array_key_exists($name, $this->attributes);
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    }
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    /**
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     * {@inheritdoc}
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     */
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    public function get(string $name, $default = null)
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    {
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        return \array_key_exists($name, $this->attributes) ? $this->attributes[$name] : $default;
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    }
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    /**
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     * {@inheritdoc}
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     */
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    public function set(string $name, $value)
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    {
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        $this->attributes[$name] = $value;
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    }
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    /**
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     * {@inheritdoc}
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     */
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    public function all()
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    {
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        return $this->attributes;
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    }
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    /**
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     * {@inheritdoc}
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     */
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    public function replace(array $attributes)
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    {
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        $this->attributes = [];
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        foreach ($attributes as $key => $value) {
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            $this->set($key, $value);
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        }
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    }
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    /**
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     * {@inheritdoc}
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     */
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    public function remove(string $name)
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    {
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        $retval = null;
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        if (\array_key_exists($name, $this->attributes)) {
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            $retval = $this->attributes[$name];
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            unset($this->attributes[$name]);
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        }
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        return $retval;
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    }
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    /**
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     * {@inheritdoc}
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     */
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    public function clear()
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    {
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        $return = $this->attributes;
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        $this->attributes = [];
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        return $return;
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    }
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    /**
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     * Returns an iterator for attributes.
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     *
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     * @return \ArrayIterator An \ArrayIterator instance
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     */
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    public function getIterator()
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    {
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        return new \ArrayIterator($this->attributes);
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    }
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    /**
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     * Returns the number of attributes.
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     *
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     * @return int The number of attributes
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     */
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    public function count()
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    {
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        return \count($this->attributes);
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    }
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}