Concurrent[] cs = new Concurrent[nbobj];
for(int i=0; i<nbobj ; i++) {
cs[i] = new Concurrent(i + 10, "d" + i,
new Time(Calendar.getInstance().getTimeInMillis()));
}
pm.makePersistentAll(cs);
pm.close();
pm = pmf.getPersistenceManager();
Query q = pm.newQuery(Concurrent.class);
q.setFilter("(dossard==p1)");