io.ebean.meta.SortMetric Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of ebean-api Show documentation

ebean api

There is a newer version: 15.8.0

package io.ebean.meta;

import java.util.Comparator;

/**
 * Comparator for timed metrics sorted by name and then count.
 */
public final class SortMetric {

  public static final Comparator COUNT_NAME = new CountName();

  public static final Comparator NAME = new Name();
  public static final Comparator COUNT = new Count();
  public static final Comparator TOTAL = new Total();
  public static final Comparator MEAN = new Mean();
  public static final Comparator MAX = new Max();

  private static int stringCompare(String name, String name2) {
    if (name == null) {
      return name2 == null ? 0 : -1;
    }
    if (name2 == null) {
      return 1;
    }
    return name.compareTo(name2);
  }

  /**
   * Sort MetaCountMetric's by name.
   */
  public static class CountName implements Comparator {

    @Override
    public int compare(MetaCountMetric o1, MetaCountMetric o2) {
      return stringCompare(o1.name(), o2.name());
    }
  }

  /**
   * Sort by name.
   */
  public static class Name implements Comparator {

    @Override
    public int compare(MetaTimedMetric o1, MetaTimedMetric o2) {
      int i = stringCompare(o1.name(), o2.name());
      return i != 0 ? i : Long.compare(o1.count(), o2.count());
    }
  }

  /**
   * Sort by count desc.
   */
  public static class Count implements Comparator {

    @Override
    public int compare(MetaTimedMetric o1, MetaTimedMetric o2) {
      return Long.compare(o2.count(), o1.count());
    }
  }

  /**
   * Sort by total time desc.
   */
  public static class Total implements Comparator {

    @Override
    public int compare(MetaTimedMetric o1, MetaTimedMetric o2) {
      return Long.compare(o2.total(), o1.total());
    }
  }

  /**
   * Sort by mean desc.
   */
  public static class Mean implements Comparator {

    @Override
    public int compare(MetaTimedMetric o1, MetaTimedMetric o2) {
      return Long.compare(o2.mean(), o1.mean());
    }
  }

  /**
   * Sort by max desc.
   */
  public static class Max implements Comparator {

    @Override
    public int compare(MetaTimedMetric o1, MetaTimedMetric o2) {
      return Long.compare(o2.max(), o1.max());
    }
  }
}