66 lines
1.9 KiB
C#
66 lines
1.9 KiB
C#
// Licensed to the .NET Foundation under one or more agreements.
|
|
// The .NET Foundation licenses this file to you under the MIT License.
|
|
// See the LICENSE file in the project root for more information.
|
|
|
|
using System.Collections.Generic;
|
|
|
|
namespace System.Reactive.Linq.ObservableImpl
|
|
{
|
|
internal sealed class Contains<TSource> : Producer<bool, Contains<TSource>._>
|
|
{
|
|
private readonly IObservable<TSource> _source;
|
|
private readonly TSource _value;
|
|
private readonly IEqualityComparer<TSource> _comparer;
|
|
|
|
public Contains(IObservable<TSource> source, TSource value, IEqualityComparer<TSource> comparer)
|
|
{
|
|
_source = source;
|
|
_value = value;
|
|
_comparer = comparer;
|
|
}
|
|
|
|
protected override _ CreateSink(IObserver<bool> observer) => new(this, observer);
|
|
|
|
protected override void Run(_ sink) => sink.Run(_source);
|
|
|
|
internal sealed class _ : Sink<TSource, bool>
|
|
{
|
|
private readonly TSource _value;
|
|
private readonly IEqualityComparer<TSource> _comparer;
|
|
|
|
public _(Contains<TSource> parent, IObserver<bool> observer)
|
|
: base(observer)
|
|
{
|
|
_value = parent._value;
|
|
_comparer = parent._comparer;
|
|
}
|
|
|
|
public override void OnNext(TSource value)
|
|
{
|
|
bool res;
|
|
try
|
|
{
|
|
res = _comparer.Equals(value, _value);
|
|
}
|
|
catch (Exception ex)
|
|
{
|
|
ForwardOnError(ex);
|
|
return;
|
|
}
|
|
|
|
if (res)
|
|
{
|
|
ForwardOnNext(true);
|
|
ForwardOnCompleted();
|
|
}
|
|
}
|
|
|
|
public override void OnCompleted()
|
|
{
|
|
ForwardOnNext(false);
|
|
ForwardOnCompleted();
|
|
}
|
|
}
|
|
}
|
|
}
|