private Map<Integer, Set<DBSCANCluster>> toTemporalOrderMap(Iterable<DBSCANCluster> clusters) {
Map<Integer, Set<DBSCANCluster>> result = new TreeMap<>();
for (DBSCANCluster cur : clusters) {
if (result.containsKey(cur.getTimeStamp())) result.get(cur.getTimeStamp()).add(cur);
else {
Set<DBSCANCluster> cls = new HashSet<>();
cls.add(cur);
result.put(cur.getTimeStamp(), cls);
}
}
return result;
}
private boolean validateClusterDistance(DBSCANCluster c1, DBSCANCluster c2) {
double dist = c1.centroid().distanceFrom(c2.centroid());
return dist <= _distanceThreshold;
}