--- /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;
+
+/**
+ * DirectoryResource represents a resources stored in a subdirectory tree.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class DirectoryResource implements SelfCheckingResourceInterface, \Serializable
+{
+ private $resource;
+ private $pattern;
+
+ /**
+ * Constructor.
+ *
+ * @param string $resource The file path to the resource
+ * @param string|null $pattern A pattern to restrict monitored files
+ */
+ public function __construct($resource, $pattern = null)
+ {
+ $this->resource = $resource;
+ $this->pattern = $pattern;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function __toString()
+ {
+ return md5(serialize(array($this->resource, $this->pattern)));
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function getResource()
+ {
+ return $this->resource;
+ }
+
+ /**
+ * Returns the pattern to restrict monitored files.
+ *
+ * @return string|null
+ */
+ public function getPattern()
+ {
+ return $this->pattern;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function isFresh($timestamp)
+ {
+ if (!is_dir($this->resource)) {
+ return false;
+ }
+
+ if ($timestamp < filemtime($this->resource)) {
+ return false;
+ }
+
+ foreach (new \RecursiveIteratorIterator(new \RecursiveDirectoryIterator($this->resource), \RecursiveIteratorIterator::SELF_FIRST) as $file) {
+ // if regex filtering is enabled only check matching files
+ if ($this->pattern && $file->isFile() && !preg_match($this->pattern, $file->getBasename())) {
+ continue;
+ }
+
+ // always monitor directories for changes, except the .. entries
+ // (otherwise deleted files wouldn't get detected)
+ if ($file->isDir() && '/..' === substr($file, -3)) {
+ continue;
+ }
+
+ // for broken links
+ try {
+ $fileMTime = $file->getMTime();
+ } catch (\RuntimeException $e) {
+ continue;
+ }
+
+ // early return if a file's mtime exceeds the passed timestamp
+ if ($timestamp < $fileMTime) {
+ return false;
+ }
+ }
+
+ return true;
+ }
+
+ public function serialize()
+ {
+ return serialize(array($this->resource, $this->pattern));
+ }
+
+ public function unserialize($serialized)
+ {
+ list($this->resource, $this->pattern) = unserialize($serialized);
+ }
+}