| /* |
| * Copyright 2009-2010 by The Regents of the University of California |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * you may obtain a copy of the License from |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package edu.uci.ics.hyracks.storage.am.lsm.rtree.tuples; |
| |
| import edu.uci.ics.hyracks.api.dataflow.value.ITypeTraits; |
| import edu.uci.ics.hyracks.storage.am.common.tuples.TypeAwareTupleReference; |
| import edu.uci.ics.hyracks.storage.am.lsm.common.api.ILSMTreeTupleReference; |
| |
| public class LSMRTreeTupleReference extends TypeAwareTupleReference implements ILSMTreeTupleReference { |
| |
| public LSMRTreeTupleReference(ITypeTraits[] typeTraits) { |
| super(typeTraits); |
| } |
| |
| @Override |
| protected int getNullFlagsBytes() { |
| // +1.0 is for matter/antimatter bit. |
| return (int) Math.ceil((fieldCount + 1.0) / 8.0); |
| } |
| |
| @Override |
| public boolean isAntimatter() { |
| // Check if the leftmost bit is 0 or 1. |
| final byte mask = (byte) (1 << 7); |
| if ((buf.array()[tupleStartOff] & mask) != 0) { |
| return true; |
| } |
| return false; |
| } |
| |
| public int getTupleStart() { |
| return tupleStartOff; |
| } |
| } |