1 files changed, 56 insertions, 0 deletions
diff --git a/src/DotNetOAuth/Messaging/Reflection/MessageDescription.cs b/src/DotNetOAuth/Messaging/Reflection/MessageDescription.cs
new file mode 100644
index 0000000..ef73a31
--- /dev/null
+++ b/src/DotNetOAuth/Messaging/Reflection/MessageDescription.cs
@@ -0,0 +1,56 @@
+//-----------------------------------------------------------------------
+// <copyright file="MessageDescription.cs" company="Andrew Arnott">
+//     Copyright (c) Andrew Arnott. All rights reserved.
+// </copyright>
+//-----------------------------------------------------------------------
+
+namespace DotNetOAuth.Messaging.Reflection {
+	using System;
+	using System.Collections.Generic;
+	using System.Linq;
+	using System.Reflection;
+
+	internal class MessageDescription {
+		private Type messageType;
+		private Dictionary<string, MessagePart> mapping;
+
+		internal MessageDescription(Type messageType) {
+			if (messageType == null) {
+				throw new ArgumentNullException("messageType");
+			}
+
+			if (!typeof(IProtocolMessage).IsAssignableFrom(messageType)) {
+				throw new ArgumentOutOfRangeException(); // TODO: better message
+			}
+
+			this.messageType = messageType;
+			this.ReflectMessageType();
+		}
+
+		internal Type MessageType {
+			get { return this.messageType; }
+		}
+
+		internal IDictionary<string, MessagePart> Mapping {
+			get { return this.mapping; }
+		}
+
+		internal void ReflectMessageType() {
+			this.mapping = new Dictionary<string, MessagePart>();
+
+			Type currentType = this.messageType;
+			do {
+				foreach (MemberInfo member in currentType.GetMembers(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.DeclaredOnly)) {
+					if (member is PropertyInfo || member is FieldInfo) {
+						MessagePartAttribute partAttribute = member.GetCustomAttributes(typeof(MessagePartAttribute), true).OfType<MessagePartAttribute>().FirstOrDefault();
+						if (partAttribute != null) {
+							MessagePart part = new MessagePart(member, partAttribute);
+							this.mapping.Add(part.Name, part);
+						}
+					}
+				}
+				currentType = currentType.BaseType;
+			} while (currentType != null);
+		}
+	}
+}