001/**
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.apache.hadoop.hbase.util;
019
020import static org.apache.hadoop.hbase.regionserver.HStoreFile.LAST_BLOOM_KEY;
021
022import java.io.IOException;
023
024import org.apache.hadoop.hbase.Cell;
025import org.apache.hadoop.hbase.CellComparator;
026import org.apache.hadoop.hbase.CellUtil;
027import org.apache.hadoop.hbase.PrivateCellUtil;
028import org.apache.hadoop.hbase.io.hfile.HFile.Writer;
029import org.apache.yetus.audience.InterfaceAudience;
030
031/**
032 * Handles ROWCOL bloom related context. It can work with both BytebufferdCells
033 * and byte[] backed cells
034 */
035@InterfaceAudience.Private
036public class RowColBloomContext extends BloomContext {
037
038  public RowColBloomContext(BloomFilterWriter generalBloomFilterWriter, CellComparator comparator) {
039    super(generalBloomFilterWriter, comparator);
040  }
041
042  @Override
043  public void addLastBloomKey(Writer writer) throws IOException {
044    if (this.getLastCell() != null) {
045      Cell firstOnRow = PrivateCellUtil.createFirstOnRowCol(this.getLastCell());
046      // This copy happens only once when the writer is closed
047      byte[] key = PrivateCellUtil.getCellKeySerializedAsKeyValueKey(firstOnRow);
048      writer.appendFileInfo(LAST_BLOOM_KEY, key);
049    }
050  }
051
052  @Override
053  protected boolean isNewKey(Cell cell) {
054    if (this.getLastCell() != null) {
055      return !CellUtil.matchingRowColumn(cell, this.getLastCell());
056    }
057    return true;
058  }
059}