import net.floodlightcontroller.counter.ICounter.DateSpan; //导入依赖的package包/类
/**
 * Return a long that is the number of milliseconds in a ds (second/minute/hour/day/week).  (Utility method.)
 * 
 * @param ds
 * @return
 */
public static final long dateSpanToMilliseconds(DateSpan ds) {
  long delta = 1;
  switch(ds) {
   case WEEKS:
   	delta *= 7;
   case DAYS:
   	delta *= 24;
   case HOURS:
   	delta *= 60;
   case MINUTES:
   	delta *= 60;
   case SECONDS:
   	delta *= 1000;
   default:
   	break;
  }
  return delta;
}
 

import net.floodlightcontroller.counter.ICounter.DateSpan; //导入依赖的package包/类
public CountBuffer(Date startDate, DateSpan dateSpan, int seriesLength) {
  this.seriesLength = seriesLength;
  this.counterValues = new long[seriesLength];
  this.dateSpan = dateSpan;
  
  this.startDate = startDate;
  this.currentIndex = 0;
}
 

import net.floodlightcontroller.counter.ICounter.DateSpan; //导入依赖的package包/类
public CountSeries(Date startDate, DateSpan dateSpan, long[] counterValues) {
  this.counterValues = counterValues.clone();
  this.dateSpan = dateSpan;    
  this.startDate = startDate;
}