diff --git a/core/src/main/scala/jp/t2v/lab/play2/stackc/StackableController.scala b/core/src/main/scala/jp/t2v/lab/play2/stackc/StackableController.scala
index 236b863..8c72c07 100644
--- a/core/src/main/scala/jp/t2v/lab/play2/stackc/StackableController.scala
+++ b/core/src/main/scala/jp/t2v/lab/play2/stackc/StackableController.scala
@@ -73,6 +73,12 @@ class RequestWithAttributes[A](underlying: Request[A], attributes: TrieMap[Reque
     attributes.put(key, value)
     this
   }
-
+    
+  def getAll[T](implicit classTag: ClassTag[T]) = {
+    attributes.filterKeys {
+      case p: T => true
+      case _    => false
+    }
+  }
 }