1 files changed, 57 insertions, 0 deletions
diff --git a/src/DotNetOpenAuth.OAuth2.ResourceServer/OAuth2/IAccessTokenAnalyzer.cs b/src/DotNetOpenAuth.OAuth2.ResourceServer/OAuth2/IAccessTokenAnalyzer.cs
new file mode 100644
index 0000000..5c5a526
--- /dev/null
+++ b/src/DotNetOpenAuth.OAuth2.ResourceServer/OAuth2/IAccessTokenAnalyzer.cs
@@ -0,0 +1,57 @@
+//-----------------------------------------------------------------------
+// <copyright file="IAccessTokenAnalyzer.cs" company="Outercurve Foundation">
+//     Copyright (c) Outercurve Foundation. All rights reserved.
+// </copyright>
+//-----------------------------------------------------------------------
+
+namespace DotNetOpenAuth.OAuth2 {
+	using System;
+	using System.Collections.Generic;
+	using System.Diagnostics.CodeAnalysis;
+	using System.Diagnostics.Contracts;
+	using System.Linq;
+	using System.Text;
+	using DotNetOpenAuth.Messaging;
+
+	/// <summary>
+	/// An interface that resource server hosts should implement if they accept access tokens
+	/// issued by non-DotNetOpenAuth authorization servers.
+	/// </summary>
+	[ContractClass((typeof(IAccessTokenAnalyzerContract)))]
+	public interface IAccessTokenAnalyzer {
+		/// <summary>
+		/// Reads an access token to find out what data it authorizes access to.
+		/// </summary>
+		/// <param name="message">The message carrying the access token.</param>
+		/// <param name="accessToken">The access token's serialized representation.</param>
+		/// <returns>The deserialized, validated token.</returns>
+		/// <exception cref="ProtocolException">Thrown if the access token is expired, invalid, or from an untrusted authorization server.</exception>
+		AccessToken DeserializeAccessToken(IDirectedProtocolMessage message, string accessToken);
+	}
+
+	/// <summary>
+	/// Code contract for the <see cref="IAccessTokenAnalyzer"/> interface.
+	/// </summary>
+	[ContractClassFor(typeof(IAccessTokenAnalyzer))]
+	internal abstract class IAccessTokenAnalyzerContract : IAccessTokenAnalyzer {
+		/// <summary>
+		/// Prevents a default instance of the <see cref="IAccessTokenAnalyzerContract"/> class from being created.
+		/// </summary>
+		private IAccessTokenAnalyzerContract() {
+		}
+
+		/// <summary>
+		/// Reads an access token to find out what data it authorizes access to.
+		/// </summary>
+		/// <param name="message">The message carrying the access token.</param>
+		/// <param name="accessToken">The access token's serialized representation.</param>
+		/// <returns>The deserialized, validated token.</returns>
+		/// <exception cref="ProtocolException">Thrown if the access token is expired, invalid, or from an untrusted authorization server.</exception>
+		AccessToken IAccessTokenAnalyzer.DeserializeAccessToken(IDirectedProtocolMessage message, string accessToken) {
+			Requires.NotNull(message, "message");
+			Requires.NotNullOrEmpty(accessToken, "accessToken");
+			Contract.Ensures(Contract.Result<AccessToken>() != null);
+			throw new NotImplementedException();
+		}
+	}
+}