[rules-users] AGE problem

Hello, I would like to calculate AGE of object based on Date inside object, I can use eval but I hope it's so basic functionality that Drools should have it. It's also performance problem if I need to use EVAL in many rules (let's say 100 in XLS). I'm playing with some FUSION features like: $now : Now() && $order : SecurityOrder(this before[400d, 0d] $now) should work but I can't specify YEARS as constant. That's a problem for long time because 30*365d isn't same as 30 years if you consider leap years. Is it possible some easy way to calculate AGE of something with correct time handling and compare to years? Something like: SecurityOrder( age(createdDate) > 20y, age(createdDate) < 25y) or by FUSION: $now : Now() && $order : SecurityOrder(this before[25y, 20y] $now) For now I'm using following function in eval() but it's becoming performance problem: function boolean between(Calendar currentDate, Date oldDate, int from, int to) { Calendar fromCal = Calendar.getInstance(); fromCal.setTime(oldDate); fromCal.add(Calendar.YEAR, from); Calendar toCal = Calendar.getInstance(); toCal.setTime(oldDate); toCal.add(Calendar.YEAR, to); return currentDate.after(fromCal) && currentDate.before(toCal); } Thank you Pavel