From f11476c6582e60aaa5b24174319b5a62de23c96b Mon Sep 17 00:00:00 2001
From: Mathias <mathias@spray.cc>
Date: Wed, 25 May 2011 15:56:54 +0200
Subject: Add DelegatingFormat

---
 src/main/scala/cc/spray/json/AdditionalFormats.scala | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'src/main/scala/cc')

diff --git a/src/main/scala/cc/spray/json/AdditionalFormats.scala b/src/main/scala/cc/spray/json/AdditionalFormats.scala
index 62a30e7..5417e5a 100644
--- a/src/main/scala/cc/spray/json/AdditionalFormats.scala
+++ b/src/main/scala/cc/spray/json/AdditionalFormats.scala
@@ -27,6 +27,11 @@ trait AdditionalFormats {
     def read(value: JsValue) = value
   }
 
+  class DelegatingFormat[T](delegate: JsonFormat[T]) extends JsonFormat[T] {
+    def write(obj: T) = delegate.write(obj)
+    def read(json: JsValue) = delegate.read(json)
+  }
+
   def formatFromWriter[T :JsonWriter] = new JsonFormat[T] {
     def write(obj: T) = obj.toJson
     def read(value: JsValue) = throw new RuntimeException("JsonFormat constructed from JsonWriter can't read from JSON")
-- 
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