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// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.txt in the project root for license information.
using System.Reactive.Disposables;
using System.Reactive.Subjects;
namespace System.Reactive.Linq
{
class GroupedObservable<TKey, TElement> : ObservableBase<TElement>, IGroupedObservable<TKey, TElement>
{
private readonly TKey _key;
private readonly IObservable<TElement> _subject;
private readonly RefCountDisposable _refCount;
public GroupedObservable(TKey key, ISubject<TElement> subject, RefCountDisposable refCount)
{
_key = key;
_subject = subject;
_refCount = refCount;
}
public GroupedObservable(TKey key, ISubject<TElement> subject)
{
_key = key;
_subject = subject;
}
public TKey Key
{
get { return _key; }
}
protected override IDisposable SubscribeCore(IObserver<TElement> observer)
{
if (_refCount != null)
{
//
// [OK] Use of unsafe Subscribe: called on a known subject implementation.
//
var release = _refCount.GetDisposable();
var subscription = _subject.Subscribe/*Unsafe*/(observer);
return new CompositeDisposable(release, subscription);
}
else
{
//
// [OK] Use of unsafe Subscribe: called on a known subject implementation.
//
return _subject.Subscribe/*Unsafe*/(observer);
}
}
}
}
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