| /* |
| * 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.composites; |
| |
| import java.nio.ByteBuffer; |
| |
| import org.apache.cassandra.config.ColumnDefinition; |
| import org.apache.cassandra.cql3.Operator; |
| import org.apache.cassandra.db.*; |
| import org.apache.cassandra.db.marshal.CollectionType; |
| import org.apache.cassandra.db.marshal.SetType; |
| import org.apache.cassandra.db.rows.*; |
| import org.apache.cassandra.index.internal.CassandraIndex; |
| import org.apache.cassandra.index.internal.IndexEntry; |
| import org.apache.cassandra.schema.IndexMetadata; |
| |
| /** |
| * Index the value of a collection cell. |
| * |
| * This is a lot like an index on REGULAR, except that we also need to make |
| * the collection key part of the index entry so that: |
| * 1) we don't have to scan the whole collection at query time to know the |
| * entry is stale and if it still satisfies the query. |
| * 2) if a collection has multiple time the same value, we need one entry |
| * for each so that if we delete one of the value only we only delete the |
| * entry corresponding to that value. |
| */ |
| public class CollectionValueIndex extends CassandraIndex |
| { |
| public CollectionValueIndex(ColumnFamilyStore baseCfs, IndexMetadata indexDef) |
| { |
| super(baseCfs, indexDef); |
| } |
| |
| public ByteBuffer getIndexedValue(ByteBuffer partitionKey, |
| Clustering clustering, |
| CellPath path, ByteBuffer cellValue) |
| { |
| return cellValue; |
| } |
| |
| public CBuilder buildIndexClusteringPrefix(ByteBuffer partitionKey, |
| ClusteringPrefix prefix, |
| CellPath path) |
| { |
| CBuilder builder = CBuilder.create(getIndexComparator()); |
| builder.add(partitionKey); |
| for (int i = 0; i < prefix.size(); i++) |
| builder.add(prefix.get(i)); |
| |
| // When indexing, cell will be present, but when searching, it won't (CASSANDRA-7525) |
| if (prefix.size() == baseCfs.metadata.clusteringColumns().size() && path != null) |
| builder.add(path.get(0)); |
| |
| return builder; |
| } |
| |
| public IndexEntry decodeEntry(DecoratedKey indexedValue, Row indexEntry) |
| { |
| Clustering clustering = indexEntry.clustering(); |
| CBuilder builder = CBuilder.create(baseCfs.getComparator()); |
| for (int i = 0; i < baseCfs.getComparator().size(); i++) |
| builder.add(clustering.get(i + 1)); |
| |
| return new IndexEntry(indexedValue, |
| clustering, |
| indexEntry.primaryKeyLivenessInfo().timestamp(), |
| clustering.get(0), |
| builder.build()); |
| } |
| |
| public boolean supportsOperator(ColumnDefinition indexedColumn, Operator operator) |
| { |
| return operator == Operator.CONTAINS && !(indexedColumn.type instanceof SetType); |
| } |
| |
| public boolean isStale(Row data, ByteBuffer indexValue, int nowInSec) |
| { |
| ColumnDefinition columnDef = indexedColumn; |
| ComplexColumnData complexData = data.getComplexColumnData(columnDef); |
| if (complexData == null) |
| return true; |
| |
| for (Cell cell : complexData) |
| { |
| if (cell.isLive(nowInSec) && ((CollectionType) columnDef.type).valueComparator() |
| .compare(indexValue, cell.value()) == 0) |
| return false; |
| } |
| return true; |
| } |
| } |