--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/vendor/symfony/src/Symfony/Component/Routing/Loader/YamlFileLoader.php	Sat Sep 24 15:40:41 2011 +0200
@@ -0,0 +1,142 @@
+<?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\Routing\Loader;
+
+use Symfony\Component\Routing\RouteCollection;
+use Symfony\Component\Routing\Route;
+use Symfony\Component\Config\Resource\FileResource;
+use Symfony\Component\Yaml\Yaml;
+use Symfony\Component\Config\Loader\FileLoader;
+
+/**
+ * YamlFileLoader loads Yaml routing files.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ *
+ * @api
+ */
+class YamlFileLoader extends FileLoader
+{
+    private static $availableKeys = array(
+        'type', 'resource', 'prefix', 'pattern', 'options', 'defaults', 'requirements'
+    );
+
+    /**
+     * Loads a Yaml file.
+     *
+     * @param string $file A Yaml file path
+     * @param string $type The resource type
+     *
+     * @return RouteCollection A RouteCollection instance
+     *
+     * @throws \InvalidArgumentException When route can't be parsed
+     *
+     * @api
+     */
+    public function load($file, $type = null)
+    {
+        $path = $this->locator->locate($file);
+
+        $config = Yaml::parse($path);
+
+        $collection = new RouteCollection();
+        $collection->addResource(new FileResource($path));
+
+        // empty file
+        if (null === $config) {
+            $config = array();
+        }
+
+        // not an array
+        if (!is_array($config)) {
+            throw new \InvalidArgumentException(sprintf('The file "%s" must contain a YAML array.', $file));
+        }
+
+        foreach ($config as $name => $config) {
+            $config = $this->normalizeRouteConfig($config);
+
+            if (isset($config['resource'])) {
+                $type = isset($config['type']) ? $config['type'] : null;
+                $prefix = isset($config['prefix']) ? $config['prefix'] : null;
+                $this->setCurrentDir(dirname($path));
+                $collection->addCollection($this->import($config['resource'], $type, false, $file), $prefix);
+            } else {
+                $this->parseRoute($collection, $name, $config, $path);
+            }
+        }
+
+        return $collection;
+    }
+
+    /**
+     * Returns true if this class supports the given resource.
+     *
+     * @param mixed  $resource A resource
+     * @param string $type     The resource type
+     *
+     * @return Boolean True if this class supports the given resource, false otherwise
+     *
+     * @api
+     */
+    public function supports($resource, $type = null)
+    {
+        return is_string($resource) && 'yml' === pathinfo($resource, PATHINFO_EXTENSION) && (!$type || 'yaml' === $type);
+    }
+
+    /**
+     * Parses a route and adds it to the RouteCollection.
+     *
+     * @param RouteCollection $collection A RouteCollection instance
+     * @param string          $name       Route name
+     * @param array           $config     Route definition
+     * @param string          $file       A Yaml file path
+     *
+     * @throws \InvalidArgumentException When config pattern is not defined for the given route
+     */
+    protected function parseRoute(RouteCollection $collection, $name, $config, $file)
+    {
+        $defaults = isset($config['defaults']) ? $config['defaults'] : array();
+        $requirements = isset($config['requirements']) ? $config['requirements'] : array();
+        $options = isset($config['options']) ? $config['options'] : array();
+
+        if (!isset($config['pattern'])) {
+            throw new \InvalidArgumentException(sprintf('You must define a "pattern" for the "%s" route.', $name));
+        }
+
+        $route = new Route($config['pattern'], $defaults, $requirements, $options);
+
+        $collection->add($name, $route);
+    }
+
+    /**
+     * Normalize route configuration.
+     *
+     * @param array  $config A resource config
+     *
+     * @return array
+     *
+     * @throws InvalidArgumentException if one of the provided config keys is not supported
+     */
+    private function normalizeRouteConfig(array $config)
+    {
+        foreach ($config as $key => $value) {
+            if (!in_array($key, self::$availableKeys)) {
+                throw new \InvalidArgumentException(sprintf(
+                    'Yaml routing loader does not support given key: "%s". Expected one of the (%s).',
+                    $key, implode(', ', self::$availableKeys)
+                ));
+            }
+        }
+
+        return $config;
+    }
+}