question: public static boolean evaluateTrigger ( Trigger trigger , Double actualValue ) { requireArgument ( trigger != null , "Trigger cannot be null." ) ; requireArgument ( actualValue != null , "Trigger cannot be evaulated against null." ) ; Double lowThreshold , highThreshold ; switch ( trigger . type ) { case GREATER_THAN : return actualValue . compareTo ( trigger . getThreshold ( ) ) > 0 ; case GREATER_THAN_OR_EQ : return actualValue . compareTo ( trigger . getThreshold ( ) ) >= 0 ; case LESS_THAN : return actualValue . compareTo ( trigger . getThreshold ( ) ) < 0 ; case LESS_THAN_OR_EQ : return actualValue . compareTo ( trigger . getThreshold ( ) ) <= 0 ; case EQUAL : return actualValue . compareTo ( trigger . getThreshold ( ) ) == 0 ; case NOT_EQUAL : return actualValue . compareTo ( trigger . getThreshold ( ) ) != 0 ; case BETWEEN : lowThreshold = Math . min ( trigger . getThreshold ( ) , trigger . getSecondaryThreshold ( ) ) ; highThreshold = Math . max ( trigger . getThreshold ( ) , trigger . getSecondaryThreshold ( ) ) ; return ( actualValue . compareTo ( lowThreshold ) >= 0 && actualValue . compareTo ( highThreshold ) <= 0 ) ; case NOT_BETWEEN : lowThreshold = Math . min ( trigger . getThreshold ( ) , trigger . getSecondaryThreshold ( ) ) ; highThreshold = Math . max ( trigger . getThreshold ( ) , trigger . getSecondaryThreshold ( ) ) ; return ( actualValue . compareTo ( lowThreshold ) < 0 || actualValue . compareTo ( highThreshold ) > 0 ) ; default : throw new SystemException ( "Unsupported trigger type " + trigger . type ) ; } }
target:  Evaluates the trigger against actualValue (passed as parameter).