public void generateDemoData()

in use-cases/maintenance-scheduling/src/main/java/org/acme/maintenancescheduling/bootstrap/DemoDataGenerator.java [46:94]
43 lines of code
6 McCabe index (conditional complexity)

    public void generateDemoData(@Observes StartupEvent startupEvent) {
        if (demoData == DemoData.NONE) {
            return;
        }

        List<Crew> crewList = new ArrayList<>();
        crewList.add(new Crew("Alpha crew"));
        crewList.add(new Crew("Beta crew"));
        crewList.add(new Crew("Gamma crew"));
        if (demoData == DemoData.LARGE) {
            crewList.add(new Crew("Delta crew"));
            crewList.add(new Crew("Epsilon crew"));
        }
        crewRepository.persist(crewList);

        LocalDate fromDate = LocalDate.now().with(TemporalAdjusters.next(DayOfWeek.MONDAY));
        int weekListSize = (demoData == DemoData.LARGE) ? 16 : 8;
        LocalDate toDate = fromDate.plusWeeks(weekListSize);
        workCalendarRepository.persist(new WorkCalendar(fromDate, toDate));
        int workdayTotal = weekListSize * 5;

        final String[] JOB_AREA_NAMES = {
                "Downtown", "Uptown", "Park", "Airport", "Bay", "Hill", "Forest", "Station", "Hospital",
                "Harbor", "Market", "Fort", "Beach", "Garden", "River", "Springs", "Tower", "Mountain"};
        final String[] JOB_TARGET_NAMES = {"Street", "Bridge", "Tunnel", "Highway", "Boulevard", "Avenue",
                "Square", "Plaza"};

        List<Job> jobList = new ArrayList<>();
        int jobListSize = weekListSize * crewList.size() * 3 / 5;
        int jobAreaTargetLimit = Math.min(JOB_TARGET_NAMES.length, crewList.size() * 2);
        Random random = new Random(17);
        for (int i = 0; i < jobListSize; i++) {
            String jobArea = JOB_AREA_NAMES[i / jobAreaTargetLimit];
            String jobTarget = JOB_TARGET_NAMES[i % jobAreaTargetLimit];
            // 1 day to 2 workweeks (1 workweek on average)
            int durationInDays = 1 + random.nextInt(10);
            int readyDueBetweenWorkdays = durationInDays + 5 // at least 5 days of flexibility
                    + random.nextInt(workdayTotal - (durationInDays + 5));
            int readyWorkdayOffset = random.nextInt(workdayTotal - readyDueBetweenWorkdays + 1);
            int readyIdealEndBetweenWorkdays = readyDueBetweenWorkdays - 1 - random.nextInt(4);
            LocalDate readyDate = EndDateUpdatingVariableListener.calculateEndDate(fromDate, readyWorkdayOffset);
            LocalDate dueDate = EndDateUpdatingVariableListener.calculateEndDate(readyDate, readyDueBetweenWorkdays);
            LocalDate idealEndDate = EndDateUpdatingVariableListener.calculateEndDate(readyDate, readyIdealEndBetweenWorkdays);
            Set<String> tagSet = random.nextDouble() < 0.1 ? Set.of(jobArea, "Subway") : Set.of(jobArea);
            jobList.add(new Job(jobArea + " " + jobTarget, durationInDays, readyDate, dueDate, idealEndDate, tagSet));
        }

        jobRepository.persist(jobList);
    }