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vendor/doctrine/doctrine-bundle/CacheWarmer/DoctrineMetadataCacheWarmer.php

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+<?php
+
+namespace Doctrine\Bundle\DoctrineBundle\CacheWarmer;
+
+use Doctrine\ORM\EntityManagerInterface;
+use Doctrine\Persistence\Mapping\AbstractClassMetadataFactory;
+use LogicException;
+use Symfony\Bundle\FrameworkBundle\CacheWarmer\AbstractPhpFileCacheWarmer;
+use Symfony\Component\Cache\Adapter\ArrayAdapter;
+
+use function is_file;
+
+/** @final since 2.11 */
+class DoctrineMetadataCacheWarmer extends AbstractPhpFileCacheWarmer
+{
+    private EntityManagerInterface $entityManager;
+    private string $phpArrayFile;
+
+    public function __construct(EntityManagerInterface $entityManager, string $phpArrayFile)
+    {
+        $this->entityManager = $entityManager;
+        $this->phpArrayFile  = $phpArrayFile;
+
+        parent::__construct($phpArrayFile);
+    }
+
+    /**
+     * It must not be optional because it should be called before ProxyCacheWarmer which is not optional.
+     */
+    public function isOptional(): bool
+    {
+        return false;
+    }
+
+    protected function doWarmUp(string $cacheDir, ArrayAdapter $arrayAdapter, ?string $buildDir = null): bool
+    {
+        // cache already warmed up, no needs to do it again
+        if (is_file($this->phpArrayFile)) {
+            return false;
+        }
+
+        $metadataFactory = $this->entityManager->getMetadataFactory();
+        if ($metadataFactory instanceof AbstractClassMetadataFactory && $metadataFactory->getLoadedMetadata()) {
+            throw new LogicException('DoctrineMetadataCacheWarmer must load metadata first, check priority of your warmers.');
+        }
+
+        $metadataFactory->setCache($arrayAdapter);
+        $metadataFactory->getAllMetadata();
+
+        return true;
+    }
+}