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The Apache Cassandra Project develops a highly scalable second-generation distributed database, bringing together Dynamo's fully distributed design and Bigtable's ColumnFamily-based data model.
/*
* 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;
import org.apache.cassandra.utils.ObjectSizes;
public abstract class AbstractBufferClusteringPrefix extends AbstractClusteringPrefix
{
public static final ByteBuffer[] EMPTY_VALUES_ARRAY = new ByteBuffer[0];
private static final long EMPTY_SIZE = ObjectSizes.measure(Clustering.make(EMPTY_VALUES_ARRAY));
protected final Kind kind;
protected final ByteBuffer[] values;
protected AbstractBufferClusteringPrefix(Kind kind, ByteBuffer[] values)
{
this.kind = kind;
this.values = values;
}
public Kind kind()
{
return kind;
}
public ClusteringPrefix clustering()
{
return this;
}
public int size()
{
return values.length;
}
public ByteBuffer get(int i)
{
return values[i];
}
public ByteBuffer[] getRawValues()
{
return values;
}
public long unsharedHeapSize()
{
return EMPTY_SIZE + ObjectSizes.sizeOnHeapOf(values);
}
public long unsharedHeapSizeExcludingData()
{
return EMPTY_SIZE + ObjectSizes.sizeOnHeapExcludingData(values);
}
}