/**
    *
    * 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.hadoop.hbase.regionserver.compactions;
  
  import java.util.ArrayList;
  import java.util.List;
  
  import org.apache.commons.logging.Log;
  import org.apache.commons.logging.LogFactory;
  import org.apache.hadoop.classification.InterfaceAudience;
  import org.apache.hadoop.hbase.regionserver.StoreFile;
  import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;
  
  @InterfaceAudience.Private
  public class CompactSelection {
    private static final long serialVersionUID = 1L;
    static final Log LOG = LogFactory.getLog(CompactSelection.class);
    // the actual list - this is needed to handle methods like "sublist" correctly
    List<StoreFile> filesToCompact = new ArrayList<StoreFile>();
    // was this compaction promoted to an off-peak
    boolean isOffPeakCompaction = false;
    // CompactSelection object creation time.
    private final long selectionTime;
  
    public CompactSelection(List<StoreFile> filesToCompact) {
      this.selectionTime = EnvironmentEdgeManager.currentTimeMillis();
      this.filesToCompact = filesToCompact;
      this.isOffPeakCompaction = false;
    }
  
    public List<StoreFile> getFilesToCompact() {
      return filesToCompact;
    }
  
    /**
     * Removes all files from the current compaction list, and resets off peak
     * compactions is set.
     */
    public void emptyFileList() {
      filesToCompact.clear();
    }
  
    public boolean isOffPeakCompaction() {
      return this.isOffPeakCompaction;
    }
  
    public void setOffPeak(boolean value) {
      this.isOffPeakCompaction = value;
    }
  
    public long getSelectionTime() {
      return selectionTime;
    }
  
    public CompactSelection getSubList(int start, int end) {
      filesToCompact = filesToCompact.subList(start, end);
      return this;
    }
  
    public void clearSubList(int start, int end) {
      filesToCompact.subList(start, end).clear();
    }
  }