/* * * 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.index.internal.keys; import java.nio.ByteBuffer; import org.apache.cassandra.config.CFMetaData; import org.apache.cassandra.config.ColumnDefinition; import org.apache.cassandra.db.*; import org.apache.cassandra.db.rows.Cell; import org.apache.cassandra.db.rows.CellPath; import org.apache.cassandra.db.rows.Row; import org.apache.cassandra.index.internal.CassandraIndex; import org.apache.cassandra.index.internal.IndexEntry; import org.apache.cassandra.schema.IndexMetadata; public class KeysIndex extends CassandraIndex { public KeysIndex(ColumnFamilyStore baseCfs, IndexMetadata indexDef) { super(baseCfs, indexDef); } public CFMetaData.Builder addIndexClusteringColumns(CFMetaData.Builder builder, CFMetaData baseMetadata, ColumnDefinition cfDef) { // no additional clustering columns required return builder; } protected CBuilder buildIndexClusteringPrefix(ByteBuffer partitionKey, ClusteringPrefix prefix, CellPath path) { CBuilder builder = CBuilder.create(getIndexComparator()); builder.add(partitionKey); return builder; } protected ByteBuffer getIndexedValue(ByteBuffer partitionKey, Clustering clustering, CellPath path, ByteBuffer cellValue) { return cellValue; } public IndexEntry decodeEntry(DecoratedKey indexedValue, Row indexEntry) { throw new UnsupportedOperationException("KEYS indexes do not use a specialized index entry format"); } public boolean isStale(Row row, ByteBuffer indexValue, int nowInSec) { if (row == null) return true; Cell cell = row.getCell(indexedColumn); return (cell == null || !cell.isLive(nowInSec) || indexedColumn.type.compare(indexValue, cell.value()) != 0); } }