code: package ontology.effects.unary;
  
  import core.vgdl.VGDLRegistry;
  import core.vgdl.VGDLSprite;
  import core.content.InteractionContent;
  import core.game.Game;
  import core.logging.Logger;
  import core.logging.Message;
  import ontology.effects.Effect;
  
  /**
   * Created with IntelliJ IDEA.
   * User: Diego
   * Date: 04/11/13
   * Time: 15:57
   * This is a Java port from Tom Schaul's VGDL - https://github.com/schaul/py-vgdl
   */
  public class KillIfHasLess extends Effect
  {
      public String resource;
      public int resourceId;
      public int limit;
  
      public KillIfHasLess(InteractionContent cnt) throws Exception
      {
          is_kill_effect = true;
          resourceId = -1;
          this.parseParameters(cnt);
          resourceId = VGDLRegistry.GetInstance().getRegisteredSpriteValue(resource);
          if(resourceId == -1){
              throw new Exception("Undefined sprite " + resource);
          }
      }
  
      @Override
      public void execute(VGDLSprite sprite1, VGDLSprite sprite2, Game game)
      {
  	if(sprite1 == null){
  	    Logger.getInstance().addMessage(new Message(Message.WARNING, "1st sprite can't be EOS with KillIfHasLess interaction."));
  	    return;
  	}
          applyScore = false;
          if(sprite1.getAmountResource(resourceId) <= limit)
          {
              //boolean variable set to false to indicate the sprite was not transformed
              game.killSprite(sprite1, false);
              applyScore = true;
          }
      }
  }
  