/**
   * Updates all internal monitors to detect changes in transitions and call all registered event
   * handlers.
   */
  public void update() {
    removeTransitionMonitorProcessors.clear();
    for (int i = 0; i < transitionMonitorProcessors.size(); i++) {
      TransitionMonitorProcessor transitionMonitorProcessor = transitionMonitorProcessors.get(i);
      transitionMonitorProcessor.update();

      if (transitionMonitorProcessor.isFinished()) {
        monitorProcessorPool.free(transitionMonitorProcessor);
        removeTransitionMonitorProcessors.add(transitionMonitorProcessor);
      }
    }
    for (int i = 0; i < removeTransitionMonitorProcessors.size(); i++)
      transitionMonitorProcessors.remove(removeTransitionMonitorProcessors.get(i));
  }
 /**
  * Monitors the Transition and calls the TransitionEventHandler whenever the Transition changes
  * its state.
  *
  * @param transition The Transition to be monitored.
  * @param transitionEventHandler The TransitionEventHandler to be called when changes were
  *     detected.
  */
 @SuppressWarnings("rawtypes")
 public void handle(Transition transition, TransitionEventHandler transitionEventHandler) {
   TransitionMonitorProcessor transitionMonitorProcessor = monitorProcessorPool.newObject();
   transitionMonitorProcessor.process(transition, transitionEventHandler);
   transitionMonitorProcessors.add(transitionMonitorProcessor);
 }