private void handleProperties(final Properties properties) throws ParseException {
        if (properties == null) {
            return;
        }
        for (final Enumeration<?> e = properties.propertyNames(); e.hasMoreElements();) {
            final String option = e.nextElement().toString();
            final Option opt = options.getOption(option);
            if (opt == null) {
                throw new UnrecognizedOptionException("Default option wasn't defined", option);
            }
            // if the option is part of a group, check if another option of the group has been selected
            final OptionGroup group = options.getOptionGroup(opt);
            final boolean selected = group != null && group.isSelected();
            if (!cmd.hasOption(option) && !selected) {
                // get the value from the properties
                final String value = properties.getProperty(option);

                if (opt.hasArg()) {
                    if (Util.isEmpty(opt.getValues())) {