#region Copyright notice and license

// Copyright 2015, 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;

namespace Grpc.Core
{
    // TODO: perhaps add also serverSideStreaming and clientSideStreaming

    public delegate void UnaryRequestServerMethod<TRequest, TResponse>(TRequest request, IObserver<TResponse> responseObserver);

    public delegate IObserver<TRequest> StreamingRequestServerMethod<TRequest, TResponse>(IObserver<TResponse> responseObserver);

    internal static class ServerCalls
    {
        public static IServerCallHandler UnaryRequestCall<TRequest, TResponse>(Method<TRequest, TResponse> method, UnaryRequestServerMethod<TRequest, TResponse> handler)
        {
            return new UnaryRequestServerCallHandler<TRequest, TResponse>(method, handler);
        }

        public static IServerCallHandler StreamingRequestCall<TRequest, TResponse>(Method<TRequest, TResponse> method, StreamingRequestServerMethod<TRequest, TResponse> handler)
        {
            return new StreamingRequestServerCallHandler<TRequest, TResponse>(method, handler);
        }
    }
}