public static void main(final String... args) throws DSOutOfServiceException,
		ExecutionException, DSAccessException
	{
		final LoginCredentials cred = new LoginCredentials(username, password, host,
			port);
		final Logger simpleLogger = new SimpleLogger();

		final Gateway gateway = new Gateway(simpleLogger);
		final ExperimenterData user = gateway.connect(cred);
		final SecurityContext ctx = new SecurityContext(user.getGroupId());
		final ROIFacility roiFac = gateway.getFacility(ROIFacility.class);

		final Collection<ROIResult> rois = roiFac.loadROIs(ctx, 701);

		for (final ROIResult result : rois) {
			final Collection<ROIData> roiDatas = result.getROIs();
			for (final ROIData roiData : roiDatas) {
				System.out.println("------------------------------");
				modifyAndSaveROI(roiData, roiFac, ctx);
			}
		}

		gateway.disconnect();
	}

	private static void modifyAndSaveROI(final ROIData roi,
		final ROIFacility roiFac, final SecurityContext ctx)
		throws DSOutOfServiceException, DSAccessException
	{
		final RectangleData rd = (RectangleData) roi.getIterator().next().get(0);

		System.out.println("Downloaded state");
		System.out.println("ROIData ID: " + roi.getId());
		printRectangleInfo(rd);

		rd.setX(18);
		rd.setY(105);
		System.out.println("Modified state");
		System.out.println("ROIData ID: " + roi.getId());
		printRectangleInfo(rd);

		final Collection<ROIData> saved = roiFac.saveROIs(ctx, 701, Collections
			.singletonList(roi));

		System.out.println("Returned state");
		for (final ROIData r : saved) {
			System.out.println("ROIData ID: " + r.getId());
			final Iterator<List<ShapeData>> itr = r.getIterator();
			while (itr.hasNext()) {
				final List<ShapeData> shapes = itr.next();
				for (final ShapeData shape : shapes) {
					if (shape instanceof RectangleData) printRectangleInfo(
						(RectangleData) shape);
					else System.out.println("Not a rectangle!?");
				}
			}
		}
	}

	private static void printRectangleInfo(final RectangleData rd) {
		System.out.println("ID: " + rd.getId() + " Z: " + rd.getZ() + " T: " + rd
			.getT() + " C: " + rd.getC() + " X: " + rd.getX() + " Y: " + rd.getY() +
			" Width: " + rd.getWidth() + " Height: " + rd.getHeight());
		System.out.println();
	}