package cz.cuni.amis.pogamut.ut2004.communication.translator.observer.support;
   
   import cz.cuni.amis.fsm.IFSMState;
   import cz.cuni.amis.pogamut.base.communication.translator.event.IWorldChangeEvent;
   import cz.cuni.amis.pogamut.ut2004.communication.messages.gbinfomessages.AliveMessage;
   import cz.cuni.amis.pogamut.ut2004.communication.translator.TranslatorContext;
   import cz.cuni.amis.pogamut.ut2004.communication.translator.TranslatorMessages;
   import cz.cuni.amis.pogamut.ut2004.communication.translator.UnexpectedMessageException;
   
  /**
   * This abstract server states is handling ALIVE message, descendants does not need to care about those messages.
   * @author Jimmy
   *
   * @param <SYMBOL>
   * @param <CONTEXT>
   */
  public abstract class AbstractObserverFSMState<SYMBOL, CONTEXT extends TranslatorContext> implements IFSMState<SYMBOL, CONTEXT> {
  	
  	protected abstract void innerStateSymbol(CONTEXT context, SYMBOL symbol);
  
  	@Override
  	public final void stateSymbol(CONTEXT context, SYMBOL symbol) {
  		if (symbol instanceof AliveMessage) {
  			if (!(symbol instanceof IWorldChangeEvent)) throw new UnexpectedMessageException(TranslatorMessages.messageNotWorldEvent(this, symbol), this);
  			context.getEventQueue().pushEvent((IWorldChangeEvent) symbol);
  		} else {
  			innerStateSymbol(context, symbol);
  		}
  	}
  	
  	@Override
  	public String toString() {
  		return getClass().getSimpleName();
  	}
  
  }