add play spickling utility methods

2 files changed, 25 insertions, 16 deletions

diff --git a/vfd-backend/app/controllers/Application.scala b/vfd-backend/app/controllers/Application.scala
index f048a07..6bd066d 100644
--- a/vfd-backend/app/controllers/Application.scala
+++ b/vfd-backend/app/controllers/Application.scala
@@ -1,5 +1,6 @@
 package controllers
 
+import util._
 import play.api._
 import play.api.mvc._
 import play.api.Play.current
@@ -21,22 +22,8 @@ object Application extends Controller {
     Ok(views.html.index())
   }
 
-  implicit object DataFrameFormat extends Format[DataFrame] {
-    import org.scalajs.spickling._
-    import org.scalajs.spickling.playjson._
-    import play.api.data.validation.ValidationError
-
-    PicklerRegistry.register[DataFrame]
-
-    def writes(o: DataFrame): JsValue = PicklerRegistry.pickle(o)
-
-    def reads(j: JsValue): JsResult[DataFrame] = PicklerRegistry.unpickle(j) match {
-      case df: DataFrame => JsSuccess(df)
-      case _ => JsError("unpickling yielded wrong type")
-    }
-  }
-
-  //implicit val dataFrameFormat = Json.format[DataFrame]
+  
+  implicit val dataFrameFormat = spicklerFormat[DataFrame]
   implicit val dataFrameFormatter = FrameFormatter.jsonFrame[DataFrame]
 
   def socket = WebSocket.acceptWithActor[String, DataFrame] { request =>
diff --git a/vfd-backend/app/util/package.scala b/vfd-backend/app/util/package.scala
new file mode 100644
index 0000000..4a6d2e6
--- /dev/null
+++ b/vfd-backend/app/util/package.scala
@@ -0,0 +1,22 @@
+
+
+import org.scalajs.spickling._
+import org.scalajs.spickling.playjson._
+import play.api.data.validation.ValidationError
+import play.api.libs.json._
+
+
+package object util {
+
+  def spicklerFormat[A](implicit manifest: Manifest[A], pickler: Pickler[A], unpickler: Unpickler[A]) = new Format[A] {
+    PicklerRegistry.register[A]
+
+    def writes(o: A): JsValue = PicklerRegistry.pickle(o)
+
+    def reads(j: JsValue): JsResult[A] = PicklerRegistry.unpickle(j) match {
+      case a: A => JsSuccess(a)
+      case _ => JsError("unpickling yielded wrong type")
+    }
+  }
+  
+}
\ No newline at end of file