Hey seamers :)
I have a quite simple question:
Suppose I have the following code in my domain model:

      /**
         *Check if given date is with a certain range
         * @param date The date
         * @return is it valid
         */
        private boolean isSubProjectStartDateValid(Date date){
                long after=project.getStartdate().getTime();
                long before=project.getEnddate().getTime();
                long lValue=date.getTime();
                 if(lValue<after) return false;
                 if(lValue>before) return false;
                 if((lValue>=after) &&(lValue<=before))return true;
             return false;
        }

        public Date getStartDate() {
                if(this.startDate==null)this.startDate=project.getStartdate();
                return startDate;
        }

        public void setStartDate(Date startDate)throws Exception {
                
                if(!isSubProjectStartDateValid(startDate)){
                        throw new Exception(" the date is invalid...);
                        
                }
                this.startDate = startDate;
        }

For now I want to internationalize the  exception message itself.
Note that the exception is correctly displayed on UI

I do not want to pollute my domain model with UI concerns as

FaceMessages.getInstance.addFrom...

would do

If you ever  have any clues, they'd be welcome :P
Thanx in advance!

Laurent