// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc.
// http://code.google.com/p/protobuf/
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
using System;
namespace Google.ProtocolBuffers {
///
/// Grab-bag of utility functions useful when dealing with RPCs.
///
public static class RpcUtil {
///
/// Converts an Action[IMessage] to an Action[T].
///
public static Action SpecializeCallback(Action action)
where T : IMessage {
return message => action(message);
}
///
/// 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.
///
public static Action GeneralizeCallback(Action action, TMessage defaultInstance)
where TMessage : class, IMessage
where TBuilder : IBuilder {
return message => {
TMessage castMessage = message as TMessage;
if (castMessage == null) {
castMessage = defaultInstance.CreateBuilderForType().MergeFrom(message).Build();
}
action(castMessage);
};
}
}
}