Adding time

Setup, Configuration and Use Scripts & Rules
1

Next question:
I’ve got one item with a DateTime and another item that contains seconds. I’d like to fill a third item with the value that results from the addition of the seconds to the DateTime. I know I need a rule, but that’s about as far as I’ve gotten.
Can anyone point me to the right direction, thank you.

2

Getting a bit further, but still not even close. In order to use plusSeconds i apparently need to cast my Item of type DateTimeItem to a DateTime, but how is that done? I can’t find any viable examples with Google… Anybody able to help?
Edit: Apparently the way to get DateTime from a DateTimeItem is: var DateTime StartTime = new DateTime((RecordingStart1.state as DateTimeType).calendar.timeInMillis)
Which seems overly complicated IMHO, but that works. but now, how do you cast/convert a DateTime to a DateTimeItem?

3

Finally figured it out, I don’t know if it’s be best solution, but it works. I’d be really happy if someone could confirm or give the proper way, but this is whatI ended up using:

import org.joda.time.DateTime
rule "RecordingEnd1"
when
	Item RecordingStart1 received update
then
	val duration = (RecordingDuration1.state as DecimalType).intValue
	val DateTime StartTime = new DateTime((RecordingStart1.state as DateTimeType).calendar.timeInMillis)
	var DateTime EndTime = StartTime.plusSeconds(duration)
	postUpdate(RecordingEnd1, new DateTimeType(EndTime.toCalendar(null)))
end
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