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.io.sstable;
  
  import java.io.IOException;
  
  import org.apache.cassandra.cache.IMeasurableMemory;
  import org.apache.cassandra.db.DeletionTime;
  import org.apache.cassandra.io.sstable.format.SSTableFormat;
  import org.apache.cassandra.io.util.DataOutputPlus;
  
  /**
   * The base RowIndexEntry is not stored on disk, only specifies a position in the data file
   */
  public abstract class AbstractRowIndexEntry implements IMeasurableMemory
  {
      public final long position;
  
      public AbstractRowIndexEntry(long position)
      {
          this.position = position;
      }
  
      /**
       * Row position in a data file
       */
      public long getPosition()
      {
          return position;
      }
  
      /**
       * @return true if this index entry contains the row-level tombstone and column summary. Otherwise,
       * caller should fetch these from the row header.
       */
      public boolean isIndexed()
      {
          return blockCount() > 1;
      }
  
      public DeletionTime deletionTime()
      {
          throw new UnsupportedOperationException();
      }
  
      public int blockCount()
      {
          return 0;
      }
  
      public abstract SSTableFormat<?, ?> getSSTableFormat();
  
      /**
       * Serialize this entry for key cache
       *
       * @param out the output stream for serialized entry
       */
      public abstract void serializeForCache(DataOutputPlus out) throws IOException;
  }
  