#region Copyright notice and license | |
// Protocol Buffers - Google's data interchange format | |
// Copyright 2008 Google Inc. All rights reserved. | |
// http://github.com/jskeet/dotnet-protobufs/ | |
// Original C++/Java/Python code: | |
// http://code.google.com/p/protobuf/ | |
// | |
// 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; | |
namespace Google.ProtocolBuffers | |
{ | |
/// <summary> | |
/// Grab-bag of utility functions useful when dealing with RPCs. | |
/// </summary> | |
public static class RpcUtil | |
{ | |
/// <summary> | |
/// Converts an Action[IMessage] to an Action[T]. | |
/// </summary> | |
public static Action<T> SpecializeCallback<T>(Action<IMessage> action) | |
where T : IMessage<T> | |
{ | |
return message => action(message); | |
} | |
/// <summary> | |
/// Converts an Action[T] to an Action[IMessage]. | |
/// The generalized action will accept any message object which has | |
/// the same descriptor, and will convert it to the correct class | |
/// before calling the original action. However, if the generalized | |
/// callback is given a message with a different descriptor, an | |
/// exception will be thrown. | |
/// </summary> | |
public static Action<IMessage> GeneralizeCallback<TMessage, TBuilder>(Action<TMessage> action, | |
TMessage defaultInstance) | |
where TMessage : class, IMessage<TMessage, TBuilder> | |
where TBuilder : IBuilder<TMessage, TBuilder> | |
{ | |
return message => | |
{ | |
TMessage castMessage = message as TMessage; | |
if (castMessage == null) | |
{ | |
castMessage = defaultInstance.CreateBuilderForType().MergeFrom(message).Build(); | |
} | |
action(castMessage); | |
}; | |
} | |
} | |
} |