/** * 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.CellBuilderType; import org.apache.hadoop.hbase.CellComparator; import org.apache.hadoop.hbase.CellUtil; import org.apache.hadoop.hbase.ExtendedCellBuilderFactory; import org.apache.yetus.audience.InterfaceAudience; /** * Handles ROWPREFIX bloom related context. * It works with both ByteBufferedCell and byte[] backed cells */ @InterfaceAudience.Private public class RowPrefixFixedLengthBloomContext extends RowBloomContext { private final int prefixLength; public RowPrefixFixedLengthBloomContext(BloomFilterWriter bloomFilterWriter, CellComparator comparator, int prefixLength) { super(bloomFilterWriter, comparator); this.prefixLength = prefixLength; } public void writeBloom(Cell cell) throws IOException { super.writeBloom(getRowPrefixCell(cell)); } /** * @param cell the cell * @return the new cell created by row prefix */ private Cell getRowPrefixCell(Cell cell) { byte[] row = CellUtil.copyRow(cell); return ExtendedCellBuilderFactory.create(CellBuilderType.DEEP_COPY) .setRow(row, 0, Math.min(prefixLength, row.length)) .setType(Cell.Type.Put) .build(); } }