using System;
using System.Collections.Generic;
using System.Text;
namespace Google.ProtocolBuffers {
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);
};
}
}
}