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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_PERF
using System;
using System.Collections.Generic;
namespace System.Reactive.Linq.ObservableImpl
{
class For<TSource, TResult> : Producer<TResult>, IConcatenatable<TResult>
{
private readonly IEnumerable<TSource> _source;
private readonly Func<TSource, IObservable<TResult>> _resultSelector;
public For(IEnumerable<TSource> source, Func<TSource, IObservable<TResult>> resultSelector)
{
_source = source;
_resultSelector = resultSelector;
}
protected override IDisposable Run(IObserver<TResult> observer, IDisposable cancel, Action<IDisposable> setSink)
{
var sink = new _(observer, cancel);
setSink(sink);
return sink.Run(GetSources());
}
public IEnumerable<IObservable<TResult>> GetSources()
{
foreach (var item in _source)
yield return _resultSelector(item);
}
class _ : ConcatSink<TResult>
{
public _(IObserver<TResult> observer, IDisposable cancel)
: base(observer, cancel)
{
}
public override void OnNext(TResult value)
{
base._observer.OnNext(value);
}
public override void OnError(Exception error)
{
base._observer.OnError(error);
base.Dispose();
}
}
}
}
#endif
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