diff -r 000000000000 -r 7f95f8617b0b vendor/metadata/src/Metadata/MetadataFactory.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/vendor/metadata/src/Metadata/MetadataFactory.php	Sat Sep 24 15:40:41 2011 +0200
@@ -0,0 +1,102 @@
+<?php
+
+/*
+ * Copyright 2011 Johannes M. Schmitt <schmittjoh@gmail.com>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+namespace Metadata;
+
+use Metadata\Cache\CacheInterface;
+
+use Metadata\Driver\DriverInterface;
+
+final class MetadataFactory implements MetadataFactoryInterface
+{
+    private $driver;
+    private $cache;
+    private $loadedMetadata = array();
+    private $loadedClassMetadata = array();
+    private $hierarchyMetadataClass;
+    private $debug;
+
+    public function __construct(DriverInterface $driver, $hierarchyMetadataClass = 'Metadata\ClassHierarchyMetadata', $debug = false)
+    {
+        $this->driver = $driver;
+        $this->hierarchyMetadataClass = $hierarchyMetadataClass;
+        $this->debug = $debug;
+    }
+
+    public function setCache(CacheInterface $cache)
+    {
+        $this->cache = $cache;
+    }
+
+    public function getMetadataForClass($className)
+    {
+        if (isset($this->loadedMetadata[$className])) {
+            return $this->loadedMetadata[$className];
+        }
+
+        $metadata = new $this->hierarchyMetadataClass;
+        foreach ($this->getClassHierarchy($className) as $class) {
+            if (isset($this->loadedClassMetadata[$name = $class->getName()])) {
+                $metadata->addClassMetadata($this->loadedClassMetadata[$name]);
+                continue;
+            }
+
+            // check the cache
+            if (null !== $this->cache
+                && (null !== $classMetadata = $this->cache->loadClassMetadataFromCache($class))) {
+                if ($this->debug && !$classMetadata->isFresh()) {
+                    $this->cache->evictClassMetadataFromCache($classMetadata->reflection);
+                } else {
+                    $this->loadedClassMetadata[$name] = $classMetadata;
+                    $metadata->addClassMetadata($classMetadata);
+                    continue;
+                }
+            }
+
+            // load from source
+            if (null !== $classMetadata = $this->driver->loadMetadataForClass($class)) {
+                $this->loadedClassMetadata[$name] = $classMetadata;
+                $metadata->addClassMetadata($classMetadata);
+
+                if (null !== $this->cache) {
+                    $this->cache->putClassMetadataInCache($classMetadata);
+                }
+
+                continue;
+            }
+        }
+
+        if (!$metadata->classMetadata) {
+            return null;
+        }
+
+        return $this->loadedMetadata[$className] = $metadata;
+    }
+
+    private function getClassHierarchy($class)
+    {
+        $classes = array();
+        $refl = new \ReflectionClass($class);
+
+        do {
+            $classes[] = $refl;
+        } while (false !== $refl = $refl->getParentClass());
+
+        return array_reverse($classes, false);
+    }
+}
\ No newline at end of file