Method thread

src/main/java/fieldbox/boxes/Callbacks.java:131–164

(Box from, T initial, Dict.Prop<IdempotencyMap<Box.BiFunctionOfBoxAnd<T, T>>> prop)

	static public String nameChange(Box from, String a) {
		return thread(from, a, onNameChange);
	}

	static public <T> T thread(Box from, T initial, Dict.Prop<IdempotencyMap<Box.BiFunctionOfBoxAnd<T, T>>> prop) {
		Object[] az = {initial};

		/*
		from.breadthFirst(from.upwards())
		    .map(x -> x.properties.get(prop))
		    .filter(x -> x != null)
		    .flatMap(x -> x.values()
				   .stream())
		    .forEach(x -> {
			    az[0] = x.apply(from, (T) az[0]);
		    });

		    */

		// this logic lets children override parents (you can use '_._' for a guarenteed unique namespace
		from.find(prop, from.upwards())
			.reduce(new IdempotencyMap<>(Box.BiFunctionOfBoxAnd.class), (a, b) -> {
				IdempotencyMap<Box.BiFunctionOfBoxAnd<T, T>> i = new IdempotencyMap<>(Box.BiFunctionOfBoxAnd.class);
				i.putAll(a);
				i.putAll(b);
				return i;
			})
			.values()
			.stream()
			.forEachOrdered(x -> {
				try {
					az[0] = x.apply(from, (T) az[0]);
				} catch (Throwable t) {
					Errors.INSTANCE.tryToReportTo(t, "Inside call[" + prop + "]", x);
				}
			});
		return (T) az[0];
	}