/*
* 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.codec.prefixtree.encode.other;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
/**
* Detect if every KV has the same KeyValue.Type, in which case we don't need to store it for each
* KV. If(allSameType) during conversion to byte[], then we can store the "onlyType" in blockMeta,
* therefore not repeating it for each cell and saving 1 byte per cell.
*/
@InterfaceAudience.Private
public class CellTypeEncoder {
/************* fields *********************/
protected boolean pendingFirstType = true;
protected boolean allSameType = true;
protected byte onlyType;
/************* construct *********************/
public void reset() {
pendingFirstType = true;
allSameType = true;
}
/************* methods *************************/
public void add(byte type) {
if (pendingFirstType) {
onlyType = type;
pendingFirstType = false;
} else if (onlyType != type) {
allSameType = false;
}
}
/**************** get/set **************************/
public boolean areAllSameType() {
return allSameType;
}
public byte getOnlyType() {
return onlyType;
}
}