public static synchronized TrainScheduleManager instance() {
if (_instance == null) {
if (log.isDebugEnabled()) {
log.debug("TrainScheduleManager creating instance");
}
// create and load
_instance = new TrainScheduleManager();
TrainManagerXml.instance(); // load trains
}
if (Control.SHOW_INSTANCE) {
log.debug("TrainScheduleManager returns instance " + _instance);
}
return _instance;
}
protected void setDirtyAndFirePropertyChange(String p, Object old, Object n) {
TrainManagerXml.instance().setDirty(true);
pcs.firePropertyChange(p, old, n);
}