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vendor/symfony/config/Resource/FileExistenceResource.php

@@ -0,0 +1,76 @@
+<?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;
+
+/**
+ * FileExistenceResource represents a resource stored on the filesystem.
+ * Freshness is only evaluated against resource creation or deletion.
+ *
+ * The resource can be a file or a directory.
+ *
+ * @author Charles-Henri Bruyand <charleshenri.bruyand@gmail.com>
+ */
+class FileExistenceResource implements SelfCheckingResourceInterface, \Serializable
+{
+    private $resource;
+
+    private $exists;
+
+    /**
+     * @param string $resource The file path to the resource
+     */
+    public function __construct($resource)
+    {
+        $this->resource = (string) $resource;
+        $this->exists = file_exists($resource);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function __toString()
+    {
+        return $this->resource;
+    }
+
+    /**
+     * @return string The file path to the resource
+     */
+    public function getResource()
+    {
+        return $this->resource;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function isFresh($timestamp)
+    {
+        return file_exists($this->resource) === $this->exists;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function serialize()
+    {
+        return serialize(array($this->resource, $this->exists));
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function unserialize($serialized)
+    {
+        list($this->resource, $this->exists) = unserialize($serialized);
+    }
+}