private String getLongPrefix()

in src/main/java/org/apache/commons/cli/DefaultParser.java [252:266]


    private String getLongPrefix(final String token) {
        final String t = Util.stripLeadingHyphens(token);

        int i;
        String opt = null;
        for (i = t.length() - 2; i > 1; i--) {
            final String prefix = t.substring(0, i);
            if (options.hasLongOption(prefix)) {
                opt = prefix;
                break;
            }
        }

        return opt;
    }