| /* |
| * Copyright 2009-2013 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.dataflow.common.data.accessors.ITupleReference; |
| import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexTupleReference; |
| import edu.uci.ics.hyracks.storage.am.rtree.tuples.RTreeTypeAwareTupleWriter; |
| |
| public class LSMRTreeTupleWriter extends RTreeTypeAwareTupleWriter { |
| private final boolean isAntimatter; |
| |
| public LSMRTreeTupleWriter(ITypeTraits[] typeTraits, boolean isAntimatter) { |
| super(typeTraits); |
| this.isAntimatter = isAntimatter; |
| } |
| |
| @Override |
| public ITreeIndexTupleReference createTupleReference() { |
| return new LSMRTreeTupleReference(typeTraits); |
| } |
| |
| @Override |
| public int bytesRequired(ITupleReference tuple) { |
| return super.bytesRequired(tuple); |
| } |
| |
| @Override |
| public int writeTuple(ITupleReference tuple, byte[] targetBuf, int targetOff) { |
| int bytesWritten = super.writeTuple(tuple, targetBuf, targetOff); |
| if (isAntimatter) { |
| setAntimatterBit(targetBuf, targetOff); |
| } |
| return bytesWritten; |
| } |
| |
| @Override |
| protected int getNullFlagsBytes(int numFields) { |
| // +1.0 is for matter/antimatter bit. |
| return (int) Math.ceil(((double) numFields + 1.0) / 8.0); |
| } |
| |
| @Override |
| protected int getNullFlagsBytes(ITupleReference tuple) { |
| // +1.0 is for matter/antimatter bit. |
| return (int) Math.ceil(((double) tuple.getFieldCount() + 1.0) / 8.0); |
| } |
| |
| protected void setAntimatterBit(byte[] targetBuf, int targetOff) { |
| // Set leftmost bit to 1. |
| targetBuf[targetOff] = (byte) (targetBuf[targetOff] | (1 << 7)); |
| } |
| |
| } |