question: public static int findInfractionCount ( EntityManager em , PrincipalUser user , SubSystem subSystem , long startTime ) { List < SuspensionRecord > records ; if ( subSystem == null ) { records = findByUser ( em , user ) ; } else { SuspensionRecord record = findByUserAndSubsystem ( em , user , subSystem ) ; records = record == null ? new ArrayList < SuspensionRecord > ( 0 ) : Arrays . asList ( new SuspensionRecord [ ] { record } ) ; } int count = 0 ; for ( SuspensionRecord record : records ) { List < Long > timestamps = record . getInfractionHistory ( ) ; for ( Long timestamp : timestamps ) { if ( timestamp > startTime ) { count ++ ; } } } return count ; }
target:  Finds the number of user infractions for a subsystem that have occurred since the given start time.