[rules-users] Drools and Date
Hey all,
I'm having some problems.
The first one was rather easy:
I wanted to compare a Date (deadline) of my entity Task to a certain String
date.
Apparently this does the trick: (Probably depends on Locale)
$task: Task ( deadline < "01-APR-2009" )
But then I stumbled upon a second problem. I was wondering, how one would
allow:
$task : Task ((deadline < $currentDate) || (deadline < $currentDate +
OneDay))
I had solved this by putting a sort of object (DateKeeper) that holds the
currentDate + x * AmountOfDays in the KnowledgeSession.
Code:
public class DateKeeper
{
public Date date;
private int numberOfDaysAfterCurrentTime;
public DateKeeper(int numberOfDays)
{
date = new Date(new Date().getTime() + numberOfDays *
Timer.ONE_DAY);
numberOfDaysAfterCurrentTime = numberOfDays;
}
public int getNumberOfDaysAfterCurrentTime() {
return numberOfDaysAfterCurrentTime;
}
public Date getDate()
{
return date;
}
}
Then calling it like:
DateKeeper ( numberOfDaysAfterCurrentTime == 1, $date : date )
$task : Task ((deadline < $currentDate && priority != Priority.HIGH) ||
(deadline < $date && priority != Priority.HIGH))
But I would like to find a way to do this without the object. Like a clean
way... So users can easily create new rules by simply choosing a number of
days.
If anyone knows how to solve this, it would be very much appreciated!
Kind regards
Aerv
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