@Override
public Map<String, Long> getId2mtime(Coll<?> coll) {
Map<String, Long> ret = null;
DBCollection dbcoll = fixColl(coll);
DBCursor cursor = dbcoll.find(dboEmpty, dboKeysIdandMtime);
try {
ret = new HashMap<String, Long>(cursor.count());
while (cursor.hasNext()) {
BasicDBObject raw = (BasicDBObject) cursor.next();
Object remoteId = raw.get(ID_FIELD);
// In case there is no _mtime set we assume 0. Probably a manual database addition by the
// server owner.
long mtime = raw.getLong(MTIME_FIELD, 0);
ret.put(remoteId.toString(), mtime);
}
} finally {
cursor.close();
}
return ret;
}
@Override
public Collection<String> getIds(Coll<?> coll) {
List<String> ret = null;
DBCollection dbcoll = fixColl(coll);
DBCursor cursor = dbcoll.find(dboEmpty, dboKeysId);
try {
ret = new ArrayList<String>(cursor.count());
while (cursor.hasNext()) {
Object remoteId = cursor.next().get(ID_FIELD);
ret.add(remoteId.toString());
}
} finally {
cursor.close();
}
return ret;
}
@Override
public boolean containsId(Coll<?> coll, String id) {
DBCollection dbcoll = fixColl(coll);
DBCursor cursor = dbcoll.find(new BasicDBObject(ID_FIELD, id));
return cursor.count() != 0;
}