| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 at |
| * |
| * 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 org.apache.hadoop.hbase.util; |
| |
| import java.io.IOException; |
| import org.apache.hadoop.hbase.Cell; |
| import org.apache.hadoop.hbase.CellComparator; |
| import org.apache.hadoop.hbase.io.hfile.HFile; |
| import org.apache.yetus.audience.InterfaceAudience; |
| |
| /** |
| * The bloom context that is used by the StorefileWriter to add the bloom details per cell |
| */ |
| @InterfaceAudience.Private |
| public abstract class BloomContext { |
| |
| protected BloomFilterWriter bloomFilterWriter; |
| protected CellComparator comparator; |
| |
| public BloomContext(BloomFilterWriter bloomFilterWriter, CellComparator comparator) { |
| this.bloomFilterWriter = bloomFilterWriter; |
| this.comparator = comparator; |
| } |
| |
| public Cell getLastCell() { |
| return this.bloomFilterWriter.getPrevCell(); |
| } |
| |
| /** |
| * Bloom information from the cell is retrieved nn |
| */ |
| public void writeBloom(Cell cell) throws IOException { |
| // only add to the bloom filter on a new, unique key |
| if (isNewKey(cell)) { |
| sanityCheck(cell); |
| bloomFilterWriter.append(cell); |
| } |
| } |
| |
| private void sanityCheck(Cell cell) throws IOException { |
| if (this.getLastCell() != null) { |
| if (comparator.compare(cell, this.getLastCell()) <= 0) { |
| throw new IOException("Added a key not lexically larger than" + " previous. Current cell = " |
| + cell + ", prevCell = " + this.getLastCell()); |
| } |
| } |
| } |
| |
| /** |
| * Adds the last bloom key to the HFile Writer as part of StorefileWriter close. nn |
| */ |
| public abstract void addLastBloomKey(HFile.Writer writer) throws IOException; |
| |
| /** |
| * Returns true if the cell is a new key as per the bloom type |
| * @param cell the cell to be verified |
| * @return true if a new key else false |
| */ |
| protected abstract boolean isNewKey(Cell cell); |
| } |