84 lines
2.5 KiB
Java
84 lines
2.5 KiB
Java
/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.cassandra.db.composites;
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import java.nio.ByteBuffer;
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import org.apache.cassandra.config.CFMetaData;
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import org.apache.cassandra.cql3.ColumnIdentifier;
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import org.apache.cassandra.utils.memory.AbstractAllocator;
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import org.apache.cassandra.utils.ObjectSizes;
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public class SimpleDenseCellName extends SimpleComposite implements CellName
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{
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private static final long EMPTY_SIZE = ObjectSizes.measure(new SimpleDenseCellName(ByteBuffer.allocate(1)));
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// Not meant to be used directly, you should use the CellNameType method instead
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SimpleDenseCellName(ByteBuffer element)
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{
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super(element);
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}
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public int clusteringSize()
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{
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return 1;
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}
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public ColumnIdentifier cql3ColumnName(CFMetaData metadata)
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{
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return null;
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}
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public ByteBuffer collectionElement()
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{
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return null;
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}
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public boolean isCollectionCell()
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{
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return false;
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}
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public boolean isSameCQL3RowAs(CellNameType type, CellName other)
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{
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// Dense cell imply one cell by CQL row so no other cell will be the same row.
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return type.compare(this, other) == 0;
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}
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@Override
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public long unsharedHeapSize()
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{
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return EMPTY_SIZE + ObjectSizes.sizeOnHeapOf(element);
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}
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@Override
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public long unsharedHeapSizeExcludingData()
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{
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return EMPTY_SIZE + ObjectSizes.sizeOnHeapExcludingData(element);
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}
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// If cellnames were sharing some prefix components, this will break it, so
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// we might want to try to do better.
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@Override
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public CellName copy(CFMetaData cfm, AbstractAllocator allocator)
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{
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return new SimpleDenseCellName(allocator.clone(element));
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}
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}
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