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.db.marshal.ByteBufferAccessor;
  import org.apache.cassandra.schema.ColumnMetadata;
  import org.apache.cassandra.db.Clustering;
  import org.apache.cassandra.db.ColumnFamilyStore;
  import org.apache.cassandra.db.marshal.AbstractType;
  import org.apache.cassandra.db.marshal.CollectionType;
  import org.apache.cassandra.db.marshal.CompositeType;
  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 element and value of cells participating in a collection.
   *
   * The row keys for this index are a composite of the collection element
   * and value of indexed columns.
   */
  public class CollectionEntryIndex extends CollectionKeyIndexBase
  {
      public CollectionEntryIndex(ColumnFamilyStore baseCfs,
                                  IndexMetadata indexDef)
      {
          super(baseCfs, indexDef);
      }
  
      public ByteBuffer getIndexedValue(ByteBuffer partitionKey,
                                        Clustering<?> clustering,
                                        CellPath path, ByteBuffer cellValue)
      {
          return CompositeType.build(ByteBufferAccessor.instance, path.get(0), cellValue);
      }
  
      public boolean isStale(Row data, ByteBuffer indexValue, long nowInSec)
      {
          ByteBuffer[] components = ((CompositeType)functions.getIndexedValueType(indexedColumn)).split(indexValue);
          ByteBuffer mapKey = components[0];
          ByteBuffer mapValue = components[1];
  
          ColumnMetadata columnDef = indexedColumn;
          Cell<?> cell = data.getCell(columnDef, CellPath.create(mapKey));
          if (cell == null || !cell.isLive(nowInSec))
              return true;
  
          AbstractType<?> valueComparator = ((CollectionType)columnDef.type).valueComparator();
          return valueComparator.compare(mapValue, cell.buffer()) != 0;
      }
  }
  