public void execute()

in kerby-tool/kdc-tool/src/main/java/org/apache/kerby/kerberos/tool/kadmin/command/KeytabAddCommand.java [39:91]
46 lines of code
12 McCabe index (conditional complexity)

    public void execute(String input) {
        String[] commands = input.split(" ");

        String principal = null;
        String keytabFileLocation = null;
        boolean glob = false;

        //Since commands[0] is ktadd, the initial index is 1.
        int index = 1;
        while (index < commands.length) {
            String command = commands[index];
            if (command.equals("-k")) {
                index++;
                if (index >= commands.length) {
                    System.err.println(USAGE);
                    return;
                }
                keytabFileLocation = commands[index].trim();

            } else if (command.equals("-glob")) {
                glob = true;
            } else if (!command.startsWith("-")) {
                principal = command;
            }
            index++;
        }

        if (keytabFileLocation == null) {
            keytabFileLocation = DEFAULT_KEYTAB_FILE_LOCATION;
        }
        File keytabFile = new File(keytabFileLocation);

        if (principal == null) {
            System.out.println((glob ? "princ-exp" : "principal") + " not specified!");
            System.err.println(USAGE);
            return;
        }

        try {
            if (glob) {
                List<String> principals = getKadmin().getPrincipals(principal);
                if (principals.size() != 0) {
                    getKadmin().exportKeytab(keytabFile, principals);
                }
            } else {
                getKadmin().exportKeytab(keytabFile, principal);
            }
            System.out.println("Export Keytab to " + keytabFileLocation);
        } catch (KrbException e) {
            System.err.println("Principal \"" + principal + "\" fail to add entry to keytab."
                    + e.getMessage());
        }
    }