@Override
    public JoinUtil.JoinResult setDirect(byte[] bytes, int offset, int length,
        BytesBytesMultiHashMap.Result hashMapResult, MatchTracker matchTracker) {
      return currentValue.setDirect(
          bytes, offset, length, hashMapResult, matchTracker);
    }
Implementation of ReusableGetAdaptor that has Output for key serialization; row
container is also created once and reused for every row.
ql/src/java/org/apache/hadoop/hive/ql/exec/persistence/MapJoinBytesTableContainer.java