content: package org.openstack4j.model.telemetry;
  
  import org.openstack4j.model.ModelEntity;
  
  import java.util.Date;
  
  /**
   * Computed Statistics for a Query against a Meter
   *
   * @author Jeremy Unruh
   */
  public interface Statistics extends ModelEntity {
  
      /**
       * @return The average of all of the volume values seen in the data
       */
      Double getAvg();
  
      /**
       * @return The number of samples seen
       */
      Integer getCount();
  
      /**
       * @return The difference, in seconds, between the oldest and newest timestamp
       */
      Double getDuration();
  
      /**
       * @return UTC date and time of the earliest timestamp, or the query start time
       */
      Date getDurationStart();
  
      /**
       * @return UTC date and time of the oldest timestamp, or the query end time
       */
      Date getDurationEnd();
  
      /**
       * @return The maximum volume seen in the data
       */
      Double getMax();
  
      /**
       * @return The minimum volume seen in the data
       */
      Double getMin();
  
      /**
       * @return The total of all of the volume values seen in the data
       */
      Double getSum();
  
      /**
       * @return The difference, in seconds, between the period start and end
       */
      Integer getPeriod();
  
      /**
       * @return UTC date and time of the period start
       */
      Date getPeriodStart();
  
      /**
       * @return UTC date and time of the period end
       */
      Date getPeriodEnd();
  
      /**
       * @return The unit type of the data set
       */
      String getUnit();
  
      /**
       * @return The group-by of the data set
       */
      String getGroupBy();
  }
  