@Override
public Cursor findFirstOrLast(Session session, boolean first) {
TransactionMap<Value, Value> map = getMap(session);
Value v = first ? map.firstKey() : map.lastKey();
if (v == null) {
return new MVStoreCursor(session, Collections.<Value>emptyList().iterator(), 0);
}
long key = v.getLong();
MVStoreCursor cursor =
new MVStoreCursor(session, Arrays.asList((Value) ValueLong.get(key)).iterator(), key);
cursor.next();
return cursor;
}
public MVPrimaryIndex(
Database db, MVTable table, int id, IndexColumn[] columns, IndexType indexType) {
this.mvTable = table;
initBaseIndex(table, id, table.getName() + "_DATA", columns, indexType);
int[] sortTypes = new int[columns.length];
for (int i = 0; i < columns.length; i++) {
sortTypes[i] = SortOrder.ASCENDING;
}
ValueDataType keyType = new ValueDataType(null, null, null);
ValueDataType valueType = new ValueDataType(db.getCompareMode(), db, sortTypes);
mapName = "table." + getId();
dataMap = mvTable.getTransaction(null).openMap(mapName, keyType, valueType);
Value k = dataMap.lastKey();
lastKey = k == null ? 0 : k.getLong();
}
@Override
public Cursor findFirstOrLast(Session session, boolean first) {
TransactionMap<Value, Value> map = getMap(session);
ValueLong v = (ValueLong) (first ? map.firstKey() : map.lastKey());
if (v == null) {
return new MVStoreCursor(
session, Collections.<Entry<Value, Value>>emptyList().iterator(), null);
}
Value value = map.get(v);
Entry<Value, Value> e = new DataUtils.MapEntry<Value, Value>(v, value);
@SuppressWarnings("unchecked")
List<Entry<Value, Value>> list = Arrays.asList(e);
MVStoreCursor c = new MVStoreCursor(session, list.iterator(), v);
c.next();
return c;
}