Class ObservableMap.MapObserver<T,​U>

    • Field Detail

      • mapper

        final Function<? super T,​? extends U> mapper
    • Constructor Detail

      • MapObserver

        MapObserver​(Observer<? super U> actual,
                    Function<? super T,​? extends U> mapper)
    • Method Detail

      • poll

        @Nullable
        public U poll()
               throws java.lang.Throwable
        Description copied from interface: SimpleQueue
        Tries to dequeue a value (non-null) or returns null if the queue is empty.

        If the producer uses SimpleQueue.offer(Object, Object) and when polling in pairs, if the first poll() returns a non-null item, the second poll() is guaranteed to return a non-null item as well.

        Returns:
        the item or null to indicate an empty queue
        Throws:
        java.lang.Throwable - if some pre-processing of the dequeued item (usually through fused functions) throws.