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vendor/symfony/http-foundation/Session/SessionBagProxy.php

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