private void filterIncidents(final ArrayList<Incident> incidentList) {
// check if an incident already exists in DB
// if exists, what needs to be updated
// and which incidents have been resolved?
// else, write incident to DB
final List<String> ongoingIncidentIds = new ArrayList<String>();
System.out.println("Size of incidentList: " + incidentList.size());
for (final Incident incident : incidentList) {
System.out.println("current incident: " + incident.getMessage());
final Incident existingIncident = trafficInfoService.read(incident);
if (existingIncident != null) {
// already has incident in DB
if (!existingIncident.getMessage().equals(incident.getMessage())) {
// if message is different, update incidentMap information
// service update will check again to update message if different
extractIncidentInfo(incident);
}
System.out.println("Existing entry, updating DB: " + incident.getMessage());
// retrieve ongoingIncident
final Incident ongoingIncident =
trafficInfoService.read(incident, "ongoing", Incident.class);
// check if ongoing collections has incident, if yes, put the updated incident inside
if (ongoingIncident != null) {
// if contains incident, add it to list, at the end, compare with ongoingIncidents list
// the non-overlapping ones are the resolved ones.
ongoingIncidentIds.add(ongoingIncident.getId());
System.out.println("Ongoing incident added to List: " + ongoingIncident.getMessage());
// update ongoing and incident collections, new incident must replace the old
// ongoingIncident
trafficInfoService.update(incident, "ongoing", Incident.class);
trafficInfoService.update(incident);
} else {
// not found in ongoing collection, add it to ongoing collection
trafficInfoService.insert(incident, "ongoing");
ongoingIncidentIds.add(incident.getId());
// update incident collections only
System.out.println("incident collection updated: " + incident.getMessage());
trafficInfoService.update(incident);
}
} else {
// incident does not exist in DB
// extract incident info, then write it to DB
System.out.println("New entry, adding to DB: " + incident.getMessage());
final Incident tempIncident = extractIncidentInfo(incident);
// insert to incident collection
trafficInfoService.insert(tempIncident);
// insert to ongoing collection
trafficInfoService.insert(tempIncident, "ongoing");
ongoingIncidentIds.add(tempIncident.getId());
}
}
// the incident objects left inside ongoingIncidents are the ones resolved (non-overlapped)
// remove these incident objects from ongoing collections
// retrieve the ongoing traffic event of Incident type only
final List<Incident> ongoingIncidents = trafficInfoService.read("ongoing", Incident.class);
boolean ongoing;
for (final Incident ongoingIncident : ongoingIncidents) {
ongoing = false;
for (final String ongoingIncidentId : ongoingIncidentIds) {
if (ongoingIncident.getId().equals(ongoingIncidentId)) {
// still ongoing, not resolved, break
ongoing = true;
break;
}
}
// ongoingIncident not found to be ongoing anymore
if (!ongoing) {
trafficInfoService.delete(ongoingIncident, "ongoing", Incident.class);
}
}
}
