Initial checkin of gRPC to third_party/

third_party/grpc/src/csharp/Grpc.Core/Marshaller.cs

+#region Copyright notice and license
+
+// Copyright 2015-2016, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
+using System;
+using Grpc.Core.Utils;
+
+namespace Grpc.Core
+{
+    /// <summary>
+    /// Encapsulates the logic for serializing and deserializing messages.
+    /// </summary>
+    public class Marshaller<T>
+    {
+        readonly Func<T, byte[]> serializer;
+        readonly Func<byte[], T> deserializer;
+
+        /// <summary>
+        /// Initializes a new marshaller.
+        /// </summary>
+        /// <param name="serializer">Function that will be used to serialize messages.</param>
+        /// <param name="deserializer">Function that will be used to deserialize messages.</param>
+        public Marshaller(Func<T, byte[]> serializer, Func<byte[], T> deserializer)
+        {
+            this.serializer = GrpcPreconditions.CheckNotNull(serializer, "serializer");
+            this.deserializer = GrpcPreconditions.CheckNotNull(deserializer, "deserializer");
+        }
+
+        /// <summary>
+        /// Gets the serializer function.
+        /// </summary>
+        public Func<T, byte[]> Serializer
+        {
+            get
+            {
+                return this.serializer;
+            }
+        }
+
+        /// <summary>
+        /// Gets the deserializer function.
+        /// </summary>
+        public Func<byte[], T> Deserializer
+        {
+            get
+            {
+                return this.deserializer;
+            }
+        }
+    }
+
+    /// <summary>
+    /// Utilities for creating marshallers.
+    /// </summary>
+    public static class Marshallers
+    {
+        /// <summary>
+        /// Creates a marshaller from specified serializer and deserializer.
+        /// </summary>
+        public static Marshaller<T> Create<T>(Func<T, byte[]> serializer, Func<byte[], T> deserializer)
+        {
+            return new Marshaller<T>(serializer, deserializer);
+        }
+
+        /// <summary>
+        /// Returns a marshaller for <c>string</c> type. This is useful for testing.
+        /// </summary>
+        public static Marshaller<string> StringMarshaller
+        {
+            get
+            {
+                return new Marshaller<string>(System.Text.Encoding.UTF8.GetBytes,
+                                              System.Text.Encoding.UTF8.GetString);
+            }
+        }
+    }
+}