public boolean isFitForAggregation(Point point) {
boolean result = false;
for (String propertyName : GlobalProperties.getPropertiesOfInterestDatabase().keySet()) {
Object numberObject = point.getProperty(propertyName);
if (numberObject instanceof Number) {
result = result || !Utils.isNumberObjectNullOrZero((Number) numberObject);
} else {
/*
* not a number, we cannot aggregate this currently
*/
result = result || false;
}
}
/*
* also check for bbox
*/
if (bbox != null) {
Coordinate pointCoordinate = new Coordinate(point.getX(), point.getY());
if (!bbox.contains(Utils.geometryFactory.createPoint(pointCoordinate))) {
return false;
}
}
return result;
}
public void runAlgorithm(Iterator<Point> newPoints, String trackId) {
if (pointService.trackAlreadyAggregated(trackId)) {
LOGGER.info("Track already aggregated. skipping. " + trackId);
return;
}
pointService.insertTrackIntoAggregatedTracksTable(trackId);
Point nextPoint;
DateTime trackTime = null;
List<MeasurementRelation> newRelations = new ArrayList<>();
while (newPoints.hasNext()) {
nextPoint = newPoints.next();
/** set the timezone of the track */
if (trackTime == null) {
trackTime = nextPoint.getTime();
timeBasedManager.updateTimeZone(trackTime);
}
if (useCategories) {
nextPoint.setTimeCategory(timeBasedManager.fromTime(nextPoint.getTime()));
} else {
nextPoint.setTimeCategory(TimeBasedCategory.NO_CATEGORY);
}
/*
* check if point is fit for aggregation (one or more value not null or 0)
*/
if (!isFitForAggregation(nextPoint)) {
LOGGER.info("Skipping original point " + nextPoint.getID() + ". All values are null or 0.");
continue;
}
/*
* get nearest neighbor from resultSet
*/
Point nearestNeighbor =
pointService.getNearestNeighbor(nextPoint, distance, useBearing ? maxBearingDelta : 0.0);
if (nearestNeighbor != null) {
/*
* if there is one
*
* aggregate values (avg, function should be
* replaceable)
*/
LOGGER.info("aggregating point: " + nextPoint.getID());
newRelations.add(pointService.aggregate(nextPoint, nearestNeighbor, trackId));
} else {
/*
* if there is no nearest neighbor
*
* add point to resultSet
*/
LOGGER.info(
"No nearest neighbor found for " + nextPoint.getID() + ". Adding to resultSet.");
/*
* add point to result set, give it a new id
*/
newRelations.add(pointService.addToResultSet(nextPoint));
}
}
pointService.insertMeasurementRelations(newRelations);
}