public static IObservable <TOutput> OfType <TInput, TOutput>(
this IObservable <TInput> source,
params ITypeMap <TInput>[] typeMaps)
{
if (source == null)
{
throw new ArgumentNullException(nameof(source));
}
if (typeMaps == null)
{
throw new ArgumentNullException(nameof(typeMaps));
}
return(Observable
.Create <Timestamped <object> >(observer =>
{
var deserialzier = new CompositeDeserializer <TInput>(observer, typeMaps);
deserialzier.EndTime = DateTime.MaxValue;
deserialzier.AddKnownType(typeof(TOutput));
return source.SubscribeSafe(deserialzier);
})
.Select(i => i.Value)
.Where(i => i != null)
.OfType <TOutput>());
}
public InputStream(
Expression <Func <IObservable <TInput> > > createInput,
DateTime startTime,
DateTime endTime,
params Type[] typeMaps)
{
_source = createInput.Compile()();
_output = new BufferQueue <Timestamped <object> >();
_deserializer = new CompositeDeserializer <TInput>(_output, typeMaps);
}