public void makeCalendarInstance(String variableName, Calendar calendar) throws JessException, Exception
    {
        Event[] events = calendar.getEvents();
        String variables = "";
        this.mapClasses();

        for (int i = 0; i < events.length; i++) {
            String eventVariableName = variableName + "-event-" + i;
            //System.out.println("event #" + i + " = " + events[i].toString());
            this.makeEventInstance(eventVariableName, events[i]);
            variables += " " + eventVariableName;
        }
        this.executeCommand("(bind " + variableName + " (make-instance of SharedCalendar (events " + variables + ") map))");
    }