Re: [rules-users] Date arithmetic in “when” session

I dont know if this is still outstanding since the original post seems to have disappeared, but this is what I did during my proof of concept that I am going through: In a helper class (i.e. DateHelper) I had this method: public static Date getModifiedDate(int amount, String unit) { Calendar cal = Calendar.getInstance(); cal.setTime(getNow()); BusinessObject.stripTime(cal); int calUnit = Calendar.DAY_OF_YEAR; if (UNIT_MONTHS.equals(unit)) calUnit = Calendar.MONTH; else if (UNIT_YEARS.equals(unit)) calUnit = Calendar.YEAR; cal.add(calUnit, amount); return cal.getTime(); } Then in my rule it would be like this: MyFact( eval( value.before(DateHelper.getModifiedDate(-6, "MONTHS")))) Hope that helps. ----- Drools Noob since 5/2008 -- View this message in context: http://www.nabble.com/Re%3A-Date-arithmetic-in--%C3%A2%C2%80%C2%9Cwhen%C3... Sent from the drools - user mailing list archive at Nabble.com.