--- /dev/null
+<?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\Serializer\Mapping\Loader;
+
+use Symfony\Component\Serializer\Exception\MappingException;
+
+/**
+ * Base class for all file based loaders.
+ *
+ * @author Kévin Dunglas <dunglas@gmail.com>
+ */
+abstract class FileLoader implements LoaderInterface
+{
+ /**
+ * @var string
+ */
+ protected $file;
+
+ /**
+ * Constructor.
+ *
+ * @param string $file The mapping file to load
+ *
+ * @throws MappingException if the mapping file does not exist or is not readable
+ */
+ public function __construct($file)
+ {
+ if (!is_file($file)) {
+ throw new MappingException(sprintf('The mapping file %s does not exist', $file));
+ }
+
+ if (!is_readable($file)) {
+ throw new MappingException(sprintf('The mapping file %s is not readable', $file));
+ }
+
+ $this->file = $file;
+ }
+}