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// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.txt in the project root for license information.
#if NO_CDS || NO_PERF
using System.Collections.Generic;
namespace System.Reactive
{
sealed class PushPullAdapter<T, R> : IObserver<T>, IEnumerator<R>
{
Action<Notification<T>> yield;
Action dispose;
Func<Notification<R>> moveNext;
Notification<R> current;
bool done = false;
bool disposed;
public PushPullAdapter(Action<Notification<T>> yield, Func<Notification<R>> moveNext, Action dispose)
{
this.yield = yield;
this.moveNext = moveNext;
this.dispose = dispose;
}
public void OnNext(T value)
{
yield(Notification.CreateOnNext<T>(value));
}
public void OnError(Exception exception)
{
yield(Notification.CreateOnError<T>(exception));
dispose();
}
public void OnCompleted()
{
yield(Notification.CreateOnCompleted<T>());
dispose();
}
public R Current
{
get { return current.Value; }
}
public void Dispose()
{
disposed = true;
dispose();
}
object System.Collections.IEnumerator.Current
{
get { return this.Current; }
}
public bool MoveNext()
{
if (disposed)
throw new ObjectDisposedException("");
if (!done)
{
current = moveNext();
done = current.Kind != NotificationKind.OnNext;
}
current.Exception.ThrowIfNotNull();
return current.HasValue;
}
public void Reset()
{
throw new NotSupportedException();
}
}
}
#endif
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