org.apache.hudi.org.apache.hadoop.hbase.util.RowColBloomHashKey Maven / Gradle / Ivy
/**
* 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 org.apache.hadoop.hbase.Cell;
import org.apache.hadoop.hbase.KeyValue;
import org.apache.hadoop.hbase.PrivateCellUtil;
import org.apache.yetus.audience.InterfaceAudience;
/**
* An hash key for ROWCOL bloom. This assumes the cells to be serialized in the Keyvalue
* serialization format with Empty column family. Note that the byte representing the family length
* is considered to be 0
*/
@InterfaceAudience.Private
public class RowColBloomHashKey extends CellHashKey {
private final int rowLength;
private final int qualLength;
public RowColBloomHashKey(Cell cell) {
super(cell);
rowLength = cell.getRowLength();
// We don't consider the family length for ROWCOL bloom. So subtract the famLen from the
// length calculation. Timestamp and type are of no relevance here
qualLength = cell.getQualifierLength();
}
@Override
public byte get(int offset) {
// For ROW_COL blooms we use bytes
// (2 bytes) , , 0 (one byte CF length), , (8 btes), ( 1 byte)
if (offset < Bytes.SIZEOF_SHORT) {
// assign locally
int rowlen = rowLength;
byte b = (byte) rowlen;
if (offset == 0) {
rowlen >>= 8;
b = (byte) rowlen;
}
return b;
}
int refLen = Bytes.SIZEOF_SHORT + rowLength;
if (offset < refLen) {
return PrivateCellUtil.getRowByte(t, offset - Bytes.SIZEOF_SHORT);
}
if (offset == refLen) {
// The fam length should return 0 assuming there is no column family.
// Because for ROWCOL blooms family is not considered
return 0;
}
refLen += qualLength + Bytes.SIZEOF_BYTE;
// skip the family len because actual cells may have family also
if (offset < refLen) {
return PrivateCellUtil.getQualifierByte(t,
offset - (Bytes.SIZEOF_SHORT + rowLength + Bytes.SIZEOF_BYTE));
}
// TODO : check if ts and type can be removed
refLen += KeyValue.TIMESTAMP_SIZE;
if (offset < refLen) {
return LATEST_TS[offset - (Bytes.SIZEOF_SHORT + rowLength + qualLength + Bytes.SIZEOF_BYTE)];
}
return MAX_TYPE;
}
@Override
public int length() {
// For ROW_COL blooms we use bytes
// (2 bytes) , , 0 (one byte CF length), , (8 btes), ( 1 byte)
return KeyValue.ROW_LENGTH_SIZE + this.t.getRowLength() + KeyValue.FAMILY_LENGTH_SIZE
+ this.t.getQualifierLength() + KeyValue.TIMESTAMP_TYPE_SIZE;
}
}