@Override
  public Calendar retrieveCalendar(String calName) {

    synchronized (lock) {
      Calendar cal = calendarsByName.get(calName);
      if (cal != null) {
        return (Calendar) cal.clone();
      }
      return null;
    }
  }
@ Override public Calendar retrieveCalendar ( String calName ) { synchronized ( lock ) { Calendar cal = calendarsByName . get ( calName ) ; if ( cal != null ) { return ( Calendar ) cal . clone ( ) ; } return null ; } }
Retrieve the given <code>{@link org.quartz.triggers.Trigger}</code>.

@param calName The name of the <code>Calendar</code> to be retrieved.
@return The desired <code>Calendar</code>, or null if there is no match.