gistfile1.txt

+  public function convert($definition, $name, array $defaults, Request $request) {
+    // Only continue if there is a value for the given parameter.
+    if (!isset($defaults[$name])) {
+      return;
+    }
+    $entity_type = substr($definition['type'], strlen('entity:'));
+    if ($storage = $this->entityManager->getStorageController($entity_type)) {
+      return $storage->load($defaults[$name]);
+    }
+  }
 

gistfile2.txt

 public function process(array &$variables, Route $route, array &$converted) {
    $variable_names = $route->compile()->getVariables();

    $options = $route->getOptions();
    $configuredTypes = isset($options['converters']) ? $options['converters'] : array();

    $entityTypes = array_keys($this->entityManager->getDefinitions());

    foreach ($variable_names as $name) {
      // Do not process this variable if it's already marked as converted.
      if (in_array($name, $converted)) {
        continue;
      }

      // Obtain entity type to convert to from the route configuration or just
      // use the variable name as default.
      if (array_key_exists($name, $configuredTypes)) {
        $type = $configuredTypes[$name];
      }
      else {
        $type = $name;
      }

      if (in_array($type, $entityTypes)) {
        $value = $variables[$name];

        $storageController = $this->entityManager->getStorageController($type);
        $entity = $storageController->load($value);
        $variables[$name] = $entity;

        // Mark this variable as converted.
        $converted[] = $name;
      }
    }
  }