class Psr17FactoryDiscovery {}

Source

final class Psr17FactoryDiscovery extends ClassDiscovery
{
    private static function createException($type, Exception $e)
    {
        return new RealNotFoundException('No PSR-17 ' . $type . ' found. Install a package from this list: https://packagist.org/providers/psr/http-factory-implementation', 0, $e);
    }
    /**
     * @return RequestFactoryInterface
     *
     * @throws RealNotFoundException
     */
    public static function findRequestFactory()
    {
        try {
            $messageFactory = static::findOneByType(RequestFactoryInterface::class);
        } catch (DiscoveryFailedException $e) {
            throw self::createException('request factory', $e);
        }
        return static::instantiateClass($messageFactory);
    }
    /**
     * @return ResponseFactoryInterface
     *
     * @throws RealNotFoundException
     */
    public static function findResponseFactory()
    {
        try {
            $messageFactory = static::findOneByType(ResponseFactoryInterface::class);
        } catch (DiscoveryFailedException $e) {
            throw self::createException('response factory', $e);
        }
        return static::instantiateClass($messageFactory);
    }
    /**
     * @return ServerRequestFactoryInterface
     *
     * @throws RealNotFoundException
     */
    public static function findServerRequestFactory()
    {
        try {
            $messageFactory = static::findOneByType(ServerRequestFactoryInterface::class);
        } catch (DiscoveryFailedException $e) {
            throw self::createException('server request factory', $e);
        }
        return static::instantiateClass($messageFactory);
    }
    /**
     * @return StreamFactoryInterface
     *
     * @throws RealNotFoundException
     */
    public static function findStreamFactory()
    {
        try {
            $messageFactory = static::findOneByType(StreamFactoryInterface::class);
        } catch (DiscoveryFailedException $e) {
            throw self::createException('stream factory', $e);
        }
        return static::instantiateClass($messageFactory);
    }
    /**
     * @return UploadedFileFactoryInterface
     *
     * @throws RealNotFoundException
     */
    public static function findUploadedFileFactory()
    {
        try {
            $messageFactory = static::findOneByType(UploadedFileFactoryInterface::class);
        } catch (DiscoveryFailedException $e) {
            throw self::createException('uploaded file factory', $e);
        }
        return static::instantiateClass($messageFactory);
    }
    /**
     * @return UriFactoryInterface
     *
     * @throws RealNotFoundException
     */
    public static function findUriFactory()
    {
        try {
            $messageFactory = static::findOneByType(UriFactoryInterface::class);
        } catch (DiscoveryFailedException $e) {
            throw self::createException('url factory', $e);
        }
        return static::instantiateClass($messageFactory);
    }
    /**
     * @return UriFactoryInterface
     *
     * @throws RealNotFoundException
     *
     * @deprecated This will be removed in 2.0. Consider using the findUriFactory() method.
     */
    public static function findUrlFactory()
    {
        return static::findUriFactory();
    }
}

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