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Observable.FromAsync.cs
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Observable.FromAsync.cs
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using System;
namespace UniRx
{
public static partial class Observable
{
public static Func<IObservable<TResult>> FromAsyncPattern<TResult>(Func<AsyncCallback, object, IAsyncResult> begin, Func<IAsyncResult, TResult> end)
{
return () =>
{
var subject = new AsyncSubject<TResult>();
try
{
begin(iar =>
{
TResult result;
try
{
result = end(iar);
}
catch (Exception exception)
{
subject.OnError(exception);
return;
}
subject.OnNext(result);
subject.OnCompleted();
}, null);
}
catch (Exception exception)
{
return Observable.Throw<TResult>(exception, Scheduler.DefaultSchedulers.AsyncConversions);
}
return subject.AsObservable();
};
}
public static Func<T1, IObservable<TResult>> FromAsyncPattern<T1, TResult>(Func<T1, AsyncCallback, object, IAsyncResult> begin, Func<IAsyncResult, TResult> end)
{
return x =>
{
var subject = new AsyncSubject<TResult>();
try
{
begin(x, iar =>
{
TResult result;
try
{
result = end(iar);
}
catch (Exception exception)
{
subject.OnError(exception);
return;
}
subject.OnNext(result);
subject.OnCompleted();
}, null);
}
catch (Exception exception)
{
return Observable.Throw<TResult>(exception, Scheduler.DefaultSchedulers.AsyncConversions);
}
return subject.AsObservable();
};
}
public static Func<T1, T2, IObservable<TResult>> FromAsyncPattern<T1, T2, TResult>(Func<T1, T2, AsyncCallback, object, IAsyncResult> begin, Func<IAsyncResult, TResult> end)
{
return (x, y) =>
{
var subject = new AsyncSubject<TResult>();
try
{
begin(x, y, iar =>
{
TResult result;
try
{
result = end(iar);
}
catch (Exception exception)
{
subject.OnError(exception);
return;
}
subject.OnNext(result);
subject.OnCompleted();
}, null);
}
catch (Exception exception)
{
return Observable.Throw<TResult>(exception, Scheduler.DefaultSchedulers.AsyncConversions);
}
return subject.AsObservable();
};
}
public static Func<IObservable<Unit>> FromAsyncPattern(Func<AsyncCallback, object, IAsyncResult> begin, Action<IAsyncResult> end)
{
return FromAsyncPattern(begin, iar =>
{
end(iar);
return Unit.Default;
});
}
public static Func<T1, IObservable<Unit>> FromAsyncPattern<T1>(Func<T1, AsyncCallback, object, IAsyncResult> begin, Action<IAsyncResult> end)
{
return FromAsyncPattern(begin, iar =>
{
end(iar);
return Unit.Default;
});
}
public static Func<T1, T2, IObservable<Unit>> FromAsyncPattern<T1, T2>(Func<T1, T2, AsyncCallback, object, IAsyncResult> begin, Action<IAsyncResult> end)
{
return FromAsyncPattern(begin, iar =>
{
end(iar);
return Unit.Default;
});
}
}
}