--- /dev/null
+<?php
+
+/*
+* This file is part of the Behat Gherkin.
+* (c) Konstantin Kudryashov <ever.zet@gmail.com>
+*
+* For the full copyright and license information, please view the LICENSE
+* file that was distributed with this source code.
+*/
+
+namespace Behat\Gherkin\Cache;
+
+use Behat\Gherkin\Node\FeatureNode;
+
+/**
+ * Memory cache.
+ * Caches feature into a memory.
+ *
+ * @author Konstantin Kudryashov <ever.zet@gmail.com>
+ */
+class MemoryCache implements CacheInterface
+{
+ private $features = array();
+ private $timestamps = array();
+
+ /**
+ * Checks that cache for feature exists and is fresh.
+ *
+ * @param string $path Feature path
+ * @param integer $timestamp The last time feature was updated
+ *
+ * @return Boolean
+ */
+ public function isFresh($path, $timestamp)
+ {
+ if (!isset($this->features[$path])) {
+ return false;
+ }
+
+ return $this->timestamps[$path] > $timestamp;
+ }
+
+ /**
+ * Reads feature cache from path.
+ *
+ * @param string $path Feature path
+ *
+ * @return FeatureNode
+ */
+ public function read($path)
+ {
+ return $this->features[$path];
+ }
+
+ /**
+ * Caches feature node.
+ *
+ * @param string $path Feature path
+ * @param FeatureNode $feature Feature instance
+ */
+ public function write($path, FeatureNode $feature)
+ {
+ $this->features[$path] = $feature;
+ $this->timestamps[$path] = time();
+ }
+}