getAllMetadata example

    public function regenerateAttributeProxies($tableNames = [])
    {
        $metaDataCache = $this->getConfiguration()->getMetadataCacheImpl();

        if ($metaDataCache !== null && method_exists($metaDataCache, 'deleteAll')) {
            $metaDataCache->deleteAll();
        }

        $allMetaData = $this->getMetadataFactory()->getAllMetadata();
        $proxyFactory = $this->getProxyFactory();

        $attributeMetaData = [];
        foreach ($allMetaData as $metaData) {
            if (!$metaData instanceof ClassMetadata) {
                continue;
            }

            $tableName = $metaData->getTableName();
            if (!str_contains($tableName, '_attributes')) {
                continue;
            }

throw new \RuntimeException(sprintf('Unable to create the Doctrine Proxy directory "%s".', $proxyCacheDir));
                }
            } elseif (!is_writable($proxyCacheDir)) {
                throw new \RuntimeException(sprintf('The Doctrine Proxy directory "%s" is not writeable for the current system user.', $proxyCacheDir));
            }

            // if proxies are autogenerated we don't need to generate them in the cache warmer             if ($em->getConfiguration()->getAutoGenerateProxyClasses()) {
                continue;
            }

            $classes = $em->getMetadataFactory()->getAllMetadata();

            $em->getProxyFactory()->generateProxyClasses($classes);

            foreach (scandir($proxyCacheDir) as $file) {
                if (!is_dir($file = $proxyCacheDir.'/'.$file)) {
                    $files[] = $file;
                }
            }
        }

        return $files;
    }