SniperState.java

package auctionsniper;

import auctionsniper.util.Defect;

public enum SniperState { 
  JOINING {
    @Override public SniperState whenAuctionClosed() { return LOST; } 
  },
  BIDDING { 
    @Override public SniperState whenAuctionClosed() { return LOST; } 
  }, 
  WINNING { 
    @Override public SniperState whenAuctionClosed() { return WON; } 
  }, 
  LOSING {
    @Override public SniperState whenAuctionClosed() { return LOST; } 
  },
  LOST, 
  WON,
  FAILED;

  public SniperState whenAuctionClosed() { 
    throw new Defect("Auction is already closed"); 
  } 
}