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vendor/symfony/framework-bundle/CacheWarmer/ClassCacheCacheWarmer.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\Bundle\FrameworkBundle\CacheWarmer;
+
+use Symfony\Component\ClassLoader\ClassCollectionLoader;
+use Symfony\Component\HttpKernel\CacheWarmer\CacheWarmerInterface;
+
+/**
+ * Generates the Class Cache (classes.php) file.
+ *
+ * @author Tugdual Saunier <tucksaun@gmail.com>
+ */
+class ClassCacheCacheWarmer implements CacheWarmerInterface
+{
+    /**
+     * Warms up the cache.
+     *
+     * @param string $cacheDir The cache directory
+     */
+    public function warmUp($cacheDir)
+    {
+        $classmap = $cacheDir.'/classes.map';
+
+        if (!is_file($classmap)) {
+            return;
+        }
+
+        if (file_exists($cacheDir.'/classes.php')) {
+            return;
+        }
+
+        ClassCollectionLoader::load(include($classmap), $cacheDir, 'classes', false);
+    }
+
+    /**
+     * Checks whether this warmer is optional or not.
+     *
+     * @return bool always true
+     */
+    public function isOptional()
+    {
+        return true;
+    }
+}