Method readDocument

src/main/java/fieldbox/io/IO.java:302–394

(String filename, Map<String, Box> specialBoxes, Set<Box> created)

		Log.log("io.general", () -> " reading document :" + f);

		lastWasNew = false;

		if (!f.exists()) {
			// new file
			lastWasNew = true;

			Log.log("io.general", () -> " document doesn't exist ");

			Document d = new Document();
			d.externalList = new ArrayList<>();
			d.knownFiles = new LinkedHashMap<>();
			d.knownProperties = new LinkedHashSet<>();
			return d;
		}


		String m = readFromFile(f);

		Document d = (Document) new EDN().read(m);
		Map<String, Box> loaded = new HashMap<String, Box>();

		Log.log("io.general", () -> " document contains " + d.externalList.size() + " boxes ");


		for (External e : d.externalList) {
			fromExternal(e, specialBoxes);
			if (e.box != null) {
				loaded.put(e.id, e.box);
				e.box.properties.put(id, e.id);
			}
		}

		for (External e : d.externalList) {
			for (String id : e.children) {
				Box mc = specialBoxes.getOrDefault(id, loaded.get(id));

				if (mc != null) e.box.connect(mc);
				else
					Log.log("io.error", () -> " lost child ? " + id + " of " + e.box + " " + specialBoxes);
			}
			for (String id : e.parents) {
				Box mc = specialBoxes.getOrDefault(id, loaded.get(id));

				if (mc != null) mc.connect(e.box);
				else
					Log.log("io.error", () -> " lost child ? " + id + " of " + e.box + " " + specialBoxes);
			}
		}
		created.addAll(loaded.values());




		LinkedHashSet<Box> failed = new LinkedHashSet<>();
		loaded.values()
			.stream()
			.filter(b -> b instanceof Loaded)
			.forEach(b -> {