* @param fallbackFormatter the fall-back formatter to use when no specific factory
* properties have been set (can be {@code null}).
* @return a new date time formatter
*/
public DateTimeFormatter createDateTimeFormatter(DateTimeFormatter fallbackFormatter) {
DateTimeFormatter dateTimeFormatter = null;
if (StringUtils.hasLength(pattern)) {
dateTimeFormatter = DateTimeFormat.forPattern(pattern);
}
else if (iso != null && iso != ISO.NONE) {
switch (iso) {
case DATE:
dateTimeFormatter = ISODateTimeFormat.date();
break;
case TIME:
dateTimeFormatter = ISODateTimeFormat.time();
break;
case DATE_TIME:
dateTimeFormatter = ISODateTimeFormat.dateTime();
break;
case NONE:
/* no-op */
break;
default:
throw new IllegalStateException("Unsupported ISO format: " + iso);
}
}
else if (StringUtils.hasLength(style)) {
dateTimeFormatter = DateTimeFormat.forStyle(style);
}
if (dateTimeFormatter != null && this.timeZone != null) {
dateTimeFormatter = dateTimeFormatter.withZone(DateTimeZone.forTimeZone(this.timeZone));
}
return (dateTimeFormatter != null ? dateTimeFormatter : fallbackFormatter);
}