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.format.bti;
  
  import java.nio.ByteBuffer;
  
  import org.apache.cassandra.db.DecoratedKey;
  import org.apache.cassandra.io.util.FileHandle;
  import org.apache.cassandra.io.util.Rebufferer;
  import org.apache.cassandra.io.util.TailOverridingRebufferer;
  
  /**
   * Early-opened partition index. Part of the data is already written to file, but some nodes, including the ones in the
   * chain leading to the last entry in the index, are in the supplied byte buffer and are attached as a tail at the given
   * position to form a view over the partially-written data.
   */
  class PartitionIndexEarly extends PartitionIndex
  {
      final long cutoff;
      final ByteBuffer tail;
  
      public PartitionIndexEarly(FileHandle fh, long trieRoot, long keyCount, DecoratedKey first, DecoratedKey last,
                                 long cutoff, ByteBuffer tail)
      {
          super(fh, trieRoot, keyCount, first, last);
          this.cutoff = cutoff;
          this.tail = tail;
      }
  
      @Override
      protected Rebufferer instantiateRebufferer()
      {
          return new TailOverridingRebufferer(super.instantiateRebufferer(), cutoff, tail);
      }
  }
  