Method getDurationInterval

src/utils/DateTime.java:270–291

Parses the prefix of the duration, the interval and returns it as a number. E.g. if you supply "1d" it will return "1". If you supply "60m" it will return "60". @param duration The duration to parse in the format #units, e.g. "1d" or "60m" @return The interval as an integer, regardless of units. @th

(final String duration)

   * @since 2.4
   */
  public static final int getDurationInterval(final String duration) {
    if (duration == null || duration.isEmpty()) {
      throw new IllegalArgumentException("Duration cannot be null or empty");
    }
    if (duration.contains(".")) {
      throw new IllegalArgumentException("Floating point intervals are not supported");
    }
    int unit = 0;
    while (Character.isDigit(duration.charAt(unit))) {
      unit++;
    }
    int interval;
    try {
      interval = Integer.parseInt(duration.substring(0, unit));
    } catch (NumberFormatException e) {
      throw new IllegalArgumentException("Invalid duration (number): " + duration);
    }
    if (interval <= 0) {
      throw new IllegalArgumentException("Zero or negative duration: " + duration);
    }
    return interval;
  }
  
  /**
   * Returns whether or not a date is specified in a relative fashion.