As I am converting code using the java.time implementation to time4j, I want to add a Duration to a Moment but I get a compilation error. Under java.time, I would do the following:
val startTime: ZonedDateTime = ...
val duration: TemporalAmount = ...
val endTime: ZonedDateTime = startTime.plus(duration)
Using time4j though, the same does not work:
val startTime: Moment = ...
val duration: Duration[ClockUnit] = ...
val endTime: Moment = startTime.plus(duration)
The compiler complains about the generics interaction between the Duration and the Moment. No matter which way I create a Duration (at least that I found), it would need to have an associated generic of java.util.concurrent.TimeUnit, because Moment implements TimePoint[java.util.concurrent.TimeUnit] and the Moment#plus method hence needs a Duration[java.util.concurrent.TimeUnit] with the same associated generic as Moment for the time unit.
This surprises me that java.util.concurrent.TimeUnit is used as this is not a time4j type. Am I missing the finer details around this choice? I have the impression that this was decided by design.
One way that works is if I use a PlainTimestamp and adds a Duration[ClockUnit | CalendarUnit | IsoUnit], as the former type implements TimePoint[IsoUnit, PlainTime] and overloads extra supported units. Then I can convert the PlainTimestamp to whatever timezone I need afterward. Is this the intended design?
(And still:) What's the proper Duration type to use with Moment.plus method?
I am using time4j version 4.27.2