package ejava.examples.txhotel.blimpl;
   
   import java.util.ArrayList;
   import java.util.Date;
   import java.util.List;
   
   import org.apache.commons.logging.Log;
   import org.apache.commons.logging.LogFactory;
   
  import ejava.examples.txhotel.bl.HotelReservationException;
  import ejava.examples.txhotel.bl.HotelReservationSession;
  import ejava.examples.txhotel.bl.HotelReservationist;
  import ejava.examples.txhotel.bo.Person;
  import ejava.examples.txhotel.bo.Reservation;
  
  /**
   * This class represents some stateful business logic that caches desired
   * reservations until the caller calls commit. At that time they will all
   * be added to the hotel using the stateless reservationist.
   */
  public class HotelReservationSessionImpl implements HotelReservationSession {
      private static final Log log = 
          LogFactory.getLog(HotelReservationSessionImpl.class);
      private List<Reservation> pending = new ArrayList<Reservation>();
      private HotelReservationist reservationist;
  
      public void createReservation(Person person, Date startDate, Date endDate)
          throws HotelReservationException {
          pending.add(new Reservation(0,0,null,person, startDate, endDate));        
      	log.debug("added pending reservation, size=" + pending.size());
      }
      
      public void cancelReservations() throws HotelReservationException {
      }
  
      public List<Reservation> commit() throws HotelReservationException {
          log.info("************ creating " + pending.size() + " reservations ***");
          List<Reservation> commited = new ArrayList<Reservation>();
          for(Reservation p: pending) {
              Reservation c = reservationist.createReservation(
                      p.getPerson(), p.getStartDate(), p.getEndDate());
              log.debug("created reservation:" + c);
              commited.add(c);
          }
          log.debug("returning " + commited.size() + " reservations");
          return commited;
      }
  
      public void setReservationist(HotelReservationist reservationist) {
          this.reservationist = reservationist;
      }
      
      @Override
      public void close() {
      }
  }