on<E extends CacheEvent<T>> method

@override Stream<E> on<E extends CacheEvent<T>>()

Listens for events of Type T and its subtypes.

The method is called like this: myCache.on

If the method is called without a type parameter, the Stream contains every event of this Cache.

The returned Stream is a broadcast stream so multiple subscriptions are allowed.

Implementation

@override
Stream<E> on<E extends CacheEvent<T>>() {
  if (E == dynamic) {
    return streamController.stream as Stream<E>;
  } else {
    return streamController.stream.where((event) => event is E).cast<E>();
  }
}