public static String formatDurationWords()

in src/main/java/org/apache/commons/lang3/time/DurationFormatUtils.java [174:222]
42 lines of code
9 McCabe index (conditional complexity)

    public static String formatDurationWords(
        final long durationMillis,
        final boolean suppressLeadingZeroElements,
        final boolean suppressTrailingZeroElements) {

        // This method is generally replaceable by the format method, but
        // there are a series of tweaks and special cases that require
        // trickery to replicate.
        String duration = formatDuration(durationMillis, "d' days 'H' hours 'm' minutes 's' seconds'");
        if (suppressLeadingZeroElements) {
            // this is a temporary marker on the front. Like ^ in regexp.
            duration = " " + duration;
            String tmp = StringUtils.replaceOnce(duration, " 0 days", StringUtils.EMPTY);
            if (tmp.length() != duration.length()) {
                duration = tmp;
                tmp = StringUtils.replaceOnce(duration, " 0 hours", StringUtils.EMPTY);
                if (tmp.length() != duration.length()) {
                    duration = tmp;
                    tmp = StringUtils.replaceOnce(duration, " 0 minutes", StringUtils.EMPTY);
                    duration = tmp;
                }
            }
            if (!duration.isEmpty()) {
                // strip the space off again
                duration = duration.substring(1);
            }
        }
        if (suppressTrailingZeroElements) {
            String tmp = StringUtils.replaceOnce(duration, " 0 seconds", StringUtils.EMPTY);
            if (tmp.length() != duration.length()) {
                duration = tmp;
                tmp = StringUtils.replaceOnce(duration, " 0 minutes", StringUtils.EMPTY);
                if (tmp.length() != duration.length()) {
                    duration = tmp;
                    tmp = StringUtils.replaceOnce(duration, " 0 hours", StringUtils.EMPTY);
                    if (tmp.length() != duration.length()) {
                        duration = StringUtils.replaceOnce(tmp, " 0 days", StringUtils.EMPTY);
                    }
                }
            }
        }
        // handle plurals
        duration = " " + duration;
        duration = StringUtils.replaceOnce(duration, " 1 seconds", " 1 second");
        duration = StringUtils.replaceOnce(duration, " 1 minutes", " 1 minute");
        duration = StringUtils.replaceOnce(duration, " 1 hours", " 1 hour");
        duration = StringUtils.replaceOnce(duration, " 1 days", " 1 day");
        return duration.trim();
    }