1 files changed, 33 insertions, 0 deletions
diff --git a/src/DotNetOAuth/Messaging/Bindings/EnsureCompleteMessageBindingElement.cs b/src/DotNetOAuth/Messaging/Bindings/EnsureCompleteMessageBindingElement.cs
new file mode 100644
index 0000000..dc00c12
--- /dev/null
+++ b/src/DotNetOAuth/Messaging/Bindings/EnsureCompleteMessageBindingElement.cs
@@ -0,0 +1,33 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using DotNetOAuth.Messaging.Reflection;
+
+namespace DotNetOAuth.Messaging.Bindings {
+	internal class EnsureCompleteMessageBindingElement : IChannelBindingElement {
+		#region IChannelBindingElement Members
+
+		public MessageProtection Protection {
+			get { return MessageProtection.None; }
+		}
+
+		public bool PrepareMessageForSending(IProtocolMessage message) {
+			// Before we're sending the message, make sure all the required parts are present.
+			MessageDictionary dictionary = new MessageDictionary(message);
+			MessageDescription.Get(message.GetType()).EnsureRequiredMessagePartsArePresent(dictionary.Keys);
+			return true;
+		}
+
+		public bool PrepareMessageForReceiving(IProtocolMessage message) {
+			// Once the message is deserialized, it is too late to use the MessageDictionary
+			// to see if all the message parts were included in the original serialized message
+			// because non-nullable value types will already have default values by now.
+			// The code for verifying complete incoming messages is included in 
+			// MessageSerializer.Deserialize.
+			return false;
+		}
+
+		#endregion
+	}
+}