Compare DateTime to Static DateTime

Setup, Configuration and Use Scripts & Rules
1

Soo guys i need your help,

i want to compare two DateTimes with each other. So far so good.

if ( datemorning.isBefore((Sunrise_Time.state as DateTimeType).calendar.timeInMillis) ) {

        executeCommandLine("/etc/openhab2/scripts/fksteck04.sh on")

        postUpdate(FUNKD, "ON")

 }

The problem is that datemorning needs to be a static DateTime of “06:00”.
Sure i could define a DateTime in the items file and call it with DateMorning.state but this is not the way i want to code this.

I’ve tried quite a few tricks but none of them worked.

For example:

val SimpleDateFormat sdf = new SimpleDateFormat("HH:mm")

val String timestampString = sdf.format("06:00")

val DateTimeType datemorning = DateTimeType.valueOf(timestampString)

or

var DateTime datemorning = new DateTime(( "06:00" as DateTimeType).calendar.timeInMillis)

or

SimpleDateFormat parseFormat = new SimpleDateFormat("HH:mm")

Date date = parseFormat.parse("06:00")

I only need the hours and minutes (“HH:mm”). No month or year!

So is there any way to cast the DateTime without to recall the state of an already existing DateTime in the items??

2

Usually, we have to code things the way the language supports regardless of what we want.

DateTimeType and DateTime objects are absolute. They are a specific time on a specific date. You cannot define a DateTime or DateTimeType for “06:00” because there is no date. It is called DateTime for a reason. You HAVE to have the date part.

Every time this Rule runs you will have to get the time for 06:00 for today.

See [Deprecated] Design Pattern: Time Of Day

   ...
    val long morning_start   = now.withTimeAtStartOfDay.plusHours(6).millis
    if((Sunrise_Time.state as DateTimeType).getZonedDateTime.toInstant.toEpochMilli > morning_start) {
    ...
3

Thank you for the quick response.

I did not know that the DateTime need to be an actual date and can’t exist without month etc.

I’ll test the new code soon and inform you about the outcome.

4

Sooo i just tested it … worked exactly the way i wanted it to.

Thanks for your help!

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