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;
023import org.apache.hadoop.hbase.CellComparator;
024import org.apache.hadoop.hbase.CellUtil;
025import org.apache.hadoop.hbase.ExtendedCell;
026import org.apache.hadoop.hbase.PrivateCellUtil;
027import org.apache.hadoop.hbase.io.hfile.HFile.Writer;
028import org.apache.yetus.audience.InterfaceAudience;
029
030/**
031 * Handles ROWCOL bloom related context. It can work with both BytebufferdCells and byte[] backed
032 * cells
033 */
034@InterfaceAudience.Private
035public class RowColBloomContext extends BloomContext {
036
037  public RowColBloomContext(BloomFilterWriter generalBloomFilterWriter, CellComparator comparator) {
038    super(generalBloomFilterWriter, comparator);
039  }
040
041  @Override
042  public void addLastBloomKey(Writer writer) throws IOException {
043    if (this.getLastCell() != null) {
044      ExtendedCell firstOnRow = PrivateCellUtil.createFirstOnRowCol(this.getLastCell());
045      // This copy happens only once when the writer is closed
046      byte[] key = PrivateCellUtil.getCellKeySerializedAsKeyValueKey(firstOnRow);
047      writer.appendFileInfo(LAST_BLOOM_KEY, key);
048    }
049  }
050
051  @Override
052  protected boolean isNewKey(ExtendedCell cell) {
053    if (this.getLastCell() != null) {
054      return !CellUtil.matchingRowColumn(cell, this.getLastCell());
055    }
056    return true;
057  }
058}