36 lines
1.2 KiB
C#
36 lines
1.2 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Text;
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namespace Google.ProtocolBuffers {
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public static class RpcUtil {
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/// <summary>
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/// Converts an Action[IMessage] to an Action[T].
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/// </summary>
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public static Action<T> SpecializeCallback<T>(Action<IMessage> action)
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where T : IMessage<T> {
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return message => action(message);
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}
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/// <summary>
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/// Converts an Action[T] to an Action[IMessage].
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/// The generalized action will accept any message object which has
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/// the same descriptor, and will convert it to the correct class
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/// before calling the original action. However, if the generalized
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/// callback is given a message with a different descriptor, an
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/// exception will be thrown.
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/// </summary>
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public static Action<IMessage> GeneralizeCallback<T>(Action<T> action, T defaultInstance)
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where T : class, IMessage<T> {
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return message => {
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T castMessage = message as T;
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if (castMessage == null) {
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castMessage = (T) defaultInstance.CreateBuilderForType().MergeFrom(message).Build();
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}
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action(castMessage);
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};
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}
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}
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}
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