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.journal;
  
  import java.io.IOException;
  import java.util.Collection;
  
  public interface SegmentCompactor<K, V>
  {
      SegmentCompactor<?, ?> NOOP = (SegmentCompactor<Object, Object>) (segments) -> segments;
  
      static <K, V> SegmentCompactor<K, V> noop()
      {
          //noinspection unchecked
          return (SegmentCompactor<K, V>) NOOP;
      }
  
      Collection<StaticSegment<K, V>> compact(Collection<StaticSegment<K, V>> segments) throws IOException;
  }
  