String timeIntervalPattern = timeItvPtnInfo.getFirstPart() +
timeItvPtnInfo.getSecondPart();
String pattern = MessageFormat.format(dtfmt, new Object[]
{timeIntervalPattern, datePattern});
timeItvPtnInfo = DateIntervalInfo.genPatternInfo(pattern,
timeItvPtnInfo.firstDateInPtnIsLaterDate());
intervalPatterns.put(
DateIntervalInfo.CALENDAR_FIELD_TO_PATTERN_LETTER[field], timeItvPtnInfo);
}
// else: fall back
// it should not happen if the interval format defined is valid