--- /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\Config\Resource;
+
+/**
+ * FileResource represents a resource stored on the filesystem.
+ *
+ * The resource can be a file or a directory.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class FileResource implements SelfCheckingResourceInterface, \Serializable
+{
+ /**
+ * @var string|false
+ */
+ private $resource;
+
+ /**
+ * Constructor.
+ *
+ * @param string $resource The file path to the resource
+ */
+ public function __construct($resource)
+ {
+ $this->resource = realpath($resource) ?: (file_exists($resource) ? $resource : false);
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function __toString()
+ {
+ return (string) $this->resource;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function getResource()
+ {
+ return $this->resource;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function isFresh($timestamp)
+ {
+ if (false === $this->resource || !file_exists($this->resource)) {
+ return false;
+ }
+
+ return filemtime($this->resource) <= $timestamp;
+ }
+
+ public function serialize()
+ {
+ return serialize($this->resource);
+ }
+
+ public function unserialize($serialized)
+ {
+ $this->resource = unserialize($serialized);
+ }
+}