/*
 * 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.cassandra.db;

import java.nio.ByteBuffer;

The clustering column values for a row.

A Clustering is a ClusteringPrefix that must always be "complete", i.e. have as many values as there is clustering columns in the table it is part of. It is the clustering prefix used by rows.

Note however that while it's size must be equal to the table clustering size, a clustering can have null values, and this mostly for thrift backward compatibility (in practice, if a value is null, all of the following ones will be too because that's what thrift allows, but it's never assumed by the code so we could start generally allowing nulls for clustering columns if we wanted to).

/** * The clustering column values for a row. * <p> * A {@code Clustering} is a {@code ClusteringPrefix} that must always be "complete", i.e. have * as many values as there is clustering columns in the table it is part of. It is the clustering * prefix used by rows. * <p> * Note however that while it's size must be equal to the table clustering size, a clustering can have * {@code null} values, and this mostly for thrift backward compatibility (in practice, if a value is null, * all of the following ones will be too because that's what thrift allows, but it's never assumed by the * code so we could start generally allowing nulls for clustering columns if we wanted to). */
public class BufferClustering extends AbstractBufferClusteringPrefix implements Clustering { BufferClustering(ByteBuffer... values) { super(Kind.CLUSTERING, values); } }