public void saveStat(Statistic stat) {
stat.setUpdate(new Date().getTime());
em.getTransaction().begin();
if (stat.getKey() == null) {
Calendar cal = Calendar.getInstance();
cal.setFirstDayOfWeek(Calendar.SUNDAY);
cal.setTime(stat.getDate());
String key =
stat.getMomin()
+ "$"
+ stat.getName()
+ "$"
+ cal.get(Calendar.YEAR)
+ "$"
+ cal.get(Calendar.WEEK_OF_YEAR);
stat.setKey(key);
em.persist(stat);
} else em.merge(stat);
em.getTransaction().commit();
}
