content: /*
   * 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.schema.ColumnMetadata;
  import org.apache.cassandra.cql3.Operator;
  import org.apache.cassandra.db.Clustering;
  import org.apache.cassandra.db.ColumnFamilyStore;
  import org.apache.cassandra.db.marshal.SetType;
  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.schema.IndexMetadata;
  
  /**
   * Index on the collection element of the cell name of a collection.
   *
   * The row keys for this index are given by the collection element for
   * indexed columns.
   */
  public class CollectionKeyIndex extends CollectionKeyIndexBase
  {
      public CollectionKeyIndex(ColumnFamilyStore baseCfs, IndexMetadata indexDef)
      {
          super(baseCfs, indexDef);
      }
  
      public ByteBuffer getIndexedValue(ByteBuffer partitionKey,
                                        Clustering<?> clustering,
                                        CellPath path,
                                        ByteBuffer cellValue)
      {
          return path.get(0);
      }
  
      public boolean isStale(Row data, ByteBuffer indexValue, long nowInSec)
      {
          Cell<?> cell = data.getCell(indexedColumn, CellPath.create(indexValue));
          return cell == null || !cell.isLive(nowInSec);
      }
  
      public boolean supportsOperator(ColumnMetadata indexedColumn, Operator operator)
      {
          return operator == Operator.CONTAINS_KEY ||
                 operator == Operator.CONTAINS && indexedColumn.type instanceof SetType;
      }
  }
  