question: public boolean isExpired ( Calendar fromDate ) { Calendar endTime = ( Calendar ) fromDate . clone ( ) ; if ( window == null ) { endTime . add ( Calendar . HOUR_OF_DAY , INFINITE_WINDOW_ORDER_EXECUTION_TIMEOUT ) ; } else { endTime . add ( getWindowLengthCalendarField ( ) , window . getExecutionWindowLength ( ) ) ; } Calendar currTime = Calendar . getInstance ( ) ; log . debug ( "currTime:{}, endTime: {}" , currTime , endTime ) ; return currTime . compareTo ( endTime ) > 0 ; }
target:  Check if order's scheduled time + schedule window already expire.