[Demonstration 1]

[Buggy Method]
@MotechListener(subjects = { EventSubjects.CREATE_AND_ENROLL })
public void handleCreateAndEnroll(MotechEvent event) {
    Map<String, Object> params = new HashMap<>();
    params.put(EventParams.PROGRAM, event.getParameters().remove(EventParams.PROGRAM));
    params.put(EventParams.DATE, event.getParameters().remove(EventParams.DATE));
    params.put(EventParams.EXTERNAL_ID, event.getParameters().get(EventParams.EXTERNAL_ID));
    TrackedEntityInstanceDto instance = createTrackedEntityInstanceFromParams(event.getParameters());
    dhisWebService.createTrackedEntityInstance(instance);
    MotechEvent newEvent = new MotechEvent(EventSubjects.ENROLL_IN_PROGRAM, params);
    EnrollmentDto enrollmentDto = createEnrollmentFromParams(event.getParameters());
    dhisWebService.createEnrollment(enrollmentDto);
}

[Buggy Hunk]
EnrollmentDto enrollmentDto = createEnrollmentFromParams(event.getParameters());

[Patch]
EnrollmentDto enrollmentDto = createEnrollmentFromParams(newEvent.getParameters());

[Demonstration 2]

[Buggy Method]
private TimeSeries createTimeSeries(long[] inputTs, double[] inputVal, Properties config) throws Exception {
    if (inputTs.length != inputVal.length) {
        logger.log(Level.SEVERE, "Number of timestamps does not match with number of values");
        return null;
    }
    TimeSeries ts = new TimeSeries();
    ts.meta.name = "meta_name";
    ts.meta.fileName = "array_input";
    // Creating time series from input arrays of ts and values
    for (int i = 0; i < inputTs.length; i++) {
        ts.append(inputTs[i], (float) inputVal[i]);
    }
    if (config.getProperty("NUM_FUTURE_WEEKS") != null) {
        num_future_weeks = new Integer(config.getProperty("NUM_FUTURE_WEEKS"));
    }
    if (config.getProperty("BASE_WINDOWS") != null) {
        base_window = new Integer(config.getProperty("BASE_WINDOWS"));
    }
    if (config.getProperty("PERIOD") != null) {
        period = new Integer(config.getProperty("PERIOD"));
    }
    // Creating time series for future
    long lastTime = ts.lastTime();
    for (int i = 1; i <= num_future_weeks * base_window; i++) {
        ts.append((lastTime + i * period), (float) 0.0);
    }
    if (config.getProperty("AGGREGATION") != null && config.getProperty("AGGREGATOR") != null) {
        window_size = new Integer(config.getProperty("AGGREGATION"));
        aggregator = config.getProperty("AGGREGATOR");
    }
    // Handle aggregation.
    if (window_size > 1) {
        ts.data = ts.aggregate(window_size, aggregator);
        ts.meta.name += "_" + aggregator + "_" + window_size;
    }
    return ts;
}

[Buggy Hunk]
period = new Integer(config.getProperty("PERIOD"));

[Patch]
period = new Long(config.getProperty("PERIOD"));

[Demonstration 3]

[Buggy Method]
public static Result service(String ownerName, String projectName, String service, boolean isAdvertise) throws IOException, UnsupportedOperationException, ServletException {
    if (!isSupportedService(service)) {
        return forbidden(String.format("Unsupported service: '%s'", service));
    }
    Project project = Project.findByOwnerAndProjectName(ownerName, projectName);
    if (project == null) {
        return notFound();
    }
    models.User user = UserApp.currentUser();
    if (!isAllowed(project, service)) {
        if (user.isAnonymous()) {
            return BasicAuthAction.unauthorized(response());
        } else {
            // If you want the Git client showing your custom message to
            // the user, the Content-Type should be exact "text/plain"
            // without any parameter. For more details, see the code at
            // https://github.com/git/git/commit/426e70d4a11ce3b4f70636d57c6a0ab16ae08a00#diff-eea0ad565ec5903a11b6023755d491cfR154
            response().setHeader("Content-Type", "text/plain");
            return forbidden(String.format("'%s' has no permission to '%s/%s'.", user.name, ownerName, projectName));
        }
    }
    if (isAdvertise) {
        return ok(RepositoryService.gitAdvertise(project, service, response()));
    } else {
        if (request().body().isMaxSizeExceeded()) {
            return status(REQUEST_ENTITY_TOO_LARGE);
        } else {
            user.visits(project);
            return ok(RepositoryService.gitRpc(project, service, request(), response()));
        }
    }
}

[Buggy Hunk]
user.name, ownerName, projectName));

[Patch]
user.loginId, ownerName, projectName));