public void printUsage()

in src/main/java/org/apache/commons/cli/HelpFormatter.java [852:890]

• 25 lines of code
• 6 McCabe index (conditional complexity)

    public void printUsage(final PrintWriter pw, final int width, final String app, final Options options) {
        // initialize the string buffer
        final StringBuilder buff = new StringBuilder(getSyntaxPrefix()).append(app).append(Char.SP);
        // create a list for processed option groups
        final Collection<OptionGroup> processedGroups = new ArrayList<>();
        final List<Option> optList = new ArrayList<>(options.getOptions());
        if (getOptionComparator() != null) {
            Collections.sort(optList, getOptionComparator());
        }
        // iterate over the options
        for (final Iterator<Option> it = optList.iterator(); it.hasNext();) {
            // get the next Option
            final Option option = it.next();
            // check if the option is part of an OptionGroup
            final OptionGroup group = options.getOptionGroup(option);
            // if the option is part of a group
            if (group != null) {
                // and if the group has not already been processed
                if (!processedGroups.contains(group)) {
                    // add the group to the processed list
                    processedGroups.add(group);
                    // add the usage clause
                    appendOptionGroup(buff, group);
                }
                // otherwise the option was displayed in the group
                // previously so ignore it.
            }
            // if the Option is not part of an OptionGroup
            else {
                appendOption(buff, option, option.isRequired());
            }
            if (it.hasNext()) {
                buff.append(Char.SP);
            }
        }

        // call printWrapped
        printWrapped(pw, width, buff.toString().indexOf(' ') + 1, buff.toString());
    }