add PathWrapper to get a virtual path for an existing file

src/PathWrapper.php

@@ -0,0 +1,25 @@
+<?php
+/**
+ * Copyright (c) 2016 Robin Appelman <icewind@owncloud.com>
+ * This file is licensed under the Licensed under the MIT license:
+ * http://opensource.org/licenses/MIT
+ */
+
+namespace Icewind\Streams;
+
+/**
+ * A string-like object that maps to an existing stream when opened
+ */
+class PathWrapper extends NullWrapper {
+	/**
+	 * @param resource $source
+	 * @return Path|string
+	 */
+	public static function getPath($source) {
+		return new Path(__CLASS__, [
+			'null' => [
+				'source' => $source
+			]
+		]);
+	}
+}