gistfile1.java

Object dayObj = FieldUtils.readField(value, birthdayFieldName, true);
         Object monthObj = FieldUtils.readField(value, birthmonthFieldName, true);
         Object yearObj = FieldUtils.readField(value, birthyearFieldName, true);

         Boolean allNull = dayObj == null && monthObj == null && yearObj == null;
         Boolean anyNull = dayObj == null || monthObj == null || yearObj == null;

         if(required) {
            if(anyNull) {
               return false;
            } else {
               new DateTime((Integer)yearObj, (Integer)monthObj, (Integer)dayObj, 0, 0);
            }
         } else {
            if(allNull) {
               return true;
            } else if(anyNull) {
               return false;
            } else {
               new DateTime((Integer)yearObj, (Integer)monthObj, (Integer)dayObj, 0, 0);
            }
         }

1. castleri yukarida yap
2. allNull ilk kullanildigin yerin hemen ustunde tanimlansa daha temiz olur
   3.

if(anyNull) {
return false;
} else {
new DateTime((Integer)yearObj, (Integer)monthObj, (Integer)dayObj, 0, 0);
}