org.apache.hudi.org.apache.hadoop.hbase.regionserver.querymatcher.ColumnCount 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.regionserver.querymatcher;
import org.apache.yetus.audience.InterfaceAudience;
/**
* Simple wrapper for a byte buffer and a counter. Does not copy.
*
* NOT thread-safe because it is not used in a multi-threaded context, yet.
*/
@InterfaceAudience.Private
class ColumnCount {
private final byte[] bytes;
private final int offset;
private final int length;
private int count;
/**
* Constructor
* @param column the qualifier to count the versions for
*/
public ColumnCount(byte[] column) {
this(column, 0);
}
/**
* Constructor
* @param column the qualifier to count the versions for
* @param count initial count
*/
public ColumnCount(byte[] column, int count) {
this(column, 0, column.length, count);
}
/**
* Constuctor
* @param column the qualifier to count the versions for
* @param offset in the passed buffer where to start the qualifier from
* @param length of the qualifier
* @param count initial count
*/
public ColumnCount(byte[] column, int offset, int length, int count) {
this.bytes = column;
this.offset = offset;
this.length = length;
this.count = count;
}
/**
* @return the buffer
*/
public byte[] getBuffer() {
return this.bytes;
}
/**
* @return the offset
*/
public int getOffset() {
return this.offset;
}
/**
* @return the length
*/
public int getLength() {
return this.length;
}
/**
* Decrement the current version count
* @return current count
*/
public int decrement() {
return --count;
}
/**
* Increment the current version count
* @return current count
*/
public int increment() {
return ++count;
}
/**
* Set the current count to a new count
* @param count new count to set
*/
public void setCount(int count) {
this.count = count;
}
}