DefaultEntryEvictionComparatorSupplier.java

/*
 * Copyright (c) 2015-present, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 */
package com.facebook.cache.disk;

/**
 * Sorts entries by date of the last access, evicting old ones first
 */
public class DefaultEntryEvictionComparatorSupplier implements EntryEvictionComparatorSupplier {

  @Override
  public EntryEvictionComparator get() {
    return new EntryEvictionComparator() {
      @Override
      public int compare(DiskStorage.Entry e1, DiskStorage.Entry e2) {
        long time1 = e1.getTimestamp();
        long time2 = e2.getTimestamp();
        return time1 < time2 ? -1 : ((time2 == time1) ? 0 : 1);
      }
    };
  }
}