//  Events.java (c) 2005 Kari Laitinen

//  http://www.naturalprogramming.com

//  2002-11-25  Java file created.
//  2005-07-25  Last modification.

//  When this program is compiled, Date.java and DateDistance.java
//  must be in the same folder (directory) together with this file.

//  There are notes at the end of this file.

import java.util.ArrayList ;
import java.util.Collections ;

class  Event  extends Date
              implements Comparable<Event>
{
   protected String event_description ;

   public Event( int  day_of_event,
                 int  month_of_event,
                 int  year_of_event,
                 String given_event_description )
   {
      this_day   =  day_of_event ;
      this_month =  month_of_event ;
      this_year  =  year_of_event ;

      event_description  =  given_event_description ;
   }


   public String toString()
   {
      Date  date_of_event  =  new Date( this_day,
                                        this_month,
                                        this_year,
                                        date_print_format ) ;

      return ( date_of_event  +  "   "  +  event_description ) ;
   }

   public int compareTo( Event event_to_compare_to )
   {
      int  comparison_result  =  0 ;  //  Events of the same date.

      if ( this.is_earlier_than( event_to_compare_to ) )
      {
         comparison_result  =  -1 ;   //  "this" has earlier date.
      }
      else if ( this.is_later_than( event_to_compare_to ) )
      {
         comparison_result  =  1 ;    //  "this" has later date.
      }

      return  comparison_result ;
   }
}


class  Events
{
   public static void main( String[] not_in_use )
   {
      Event  birth_of_lennon   =  new  Event(
                 9, 10, 1940, "John Lennon was born.") ;
      Event  birth_of_einstein =  new  Event(
                14,  3, 1879, "Albert Einstein was born." ) ;

      ArrayList<Event>  list_of_events  =  new  ArrayList<Event>() ;

      list_of_events.add( birth_of_lennon ) ;
      list_of_events.add( birth_of_einstein ) ;
      list_of_events.add( new
          Event( 8, 12, 1980, "John Lennon was shot in New York." ) ) ;

      System.out.print( "\nEvents of list_of_events: \n" ) ;

      int event_index  =  0 ;

      while ( event_index  <  list_of_events.size() )
      {
         System.out.print( "\n   "  +  list_of_events.get( event_index ) ) ;
         event_index  ++  ;
      }


      ArrayList<Event>  another_event_list  =  new  ArrayList<Event>() ;

      another_event_list.add( 0,
         new Event( 1, 6, 1926, "Marilyn Monroe was born." ) ) ;
      another_event_list.add( 0,
         new Event( 5, 8, 1962, "Marilyn Monroe died." ) ) ;
      another_event_list.add(
         new Event(15, 8, 1769, "Napoleon Bonaparte was born." ) ) ;
      another_event_list.add(
         new Event(25,10, 1881, "Pablo Picasso was born." ) ) ;


      System.out.print( "\n\nEvents of another_event_list: \n" ) ;

      for ( event_index  =  0 ;
            event_index  <  another_event_list.size() ;
            event_index  ++ )
      {
         System.out.print( "\n   "  +  another_event_list.get( event_index ) );
      }

      Collections.sort( list_of_events ) ;
      Collections.sort( another_event_list ) ;

      list_of_events.addAll( 0, another_event_list ) ;

      System.out.print( "\n\nEvents of list_of_events: \n" ) ;

      for ( Event event_on_list : list_of_events )
      {
         System.out.print( "\n   "  +  event_on_list ) ;
      }
   }
}

/***  NOTES

   //  The following would be a shorter version of a toString()
   //  method that is suitable to class Event.

   public String toString()
   {
      return ( super.toString()  +  "   "  +  event_description ) ;
   }

   //  This program uses the Date class presented in the book.
   //  To avoid confusion, java.util.Date is not imported into this program.


****/