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