package org.andromda.utils.beans.comparators;
   
   import java.io.Serializable;
   import java.util.Calendar;
   import java.util.Comparator;
   
   /**
    * Used to sort by Calendar values
    *
   * @author Chad Brandon
   */
  class CalendarComparator
      implements Comparator,
          Serializable
  {
      private static final long serialVersionUID = 34L;
  
      /**
       * Used to sort Calendar values, both objects are assumed to be assignable
       * to java.util.Calendar
       * @param objectA
       * @param objectB
       * @return compareresult
       */
      public int compare(
          Object objectA,
          Object objectB)
      {
          Calendar aAsCalendar = (Calendar)objectA;
          Calendar bAsCalendar = (Calendar)objectB;
          int result = 0;
  
          if (bAsCalendar.after(aAsCalendar))
          {
              // set result to a negative integer if the first argument of this
              // method is less than the second
              result = -1;
          }
          else if (aAsCalendar.after(bAsCalendar))
          {
              // set result to a positive integer if the first argument of this
              // method is greater than the second
              result = 1;
          }
          return result;
      }
  }