/**
* * <br>
* Updates the neural networks</br> <br>
* Assumes that the *
*/
private void trainNeuralNets(int id) {
Train train =
new ResilientPropagation(array_of_neural_nets[id], input_datas[id].getTrainingSet());
int epoch = 0;
while (train.getError() > error_allowed && epoch < max_epoch) {
train.iteration();
epoch++;
}
}
@SuppressWarnings("unchecked")
@ApiMethod(name = "listOfTrains", path = "findmytrain/v1/listTrains")
public List<String> listTrains(@Named("station") String station) throws ParseException {
// This method should return the list of trains based on the station
// if a trains stops at the station 'station' that will be added to the
// 'trains' list
final long ONE_MINUTE_IN_MILLIS = 60000;
final int TIME_GAP_IN_MINUTES = 30;
List<Train> trains = new ArrayList<Train>();
List<Train> tempTrains = null;
Date atRequest = new Date();
SimpleDateFormat parser = new SimpleDateFormat("HH:mm");
String serverTime = parser.format(atRequest);
Date serverDate = parser.parse(serverTime);
Date upperLimit = new Date(serverDate.getTime() + (TIME_GAP_IN_MINUTES * ONE_MINUTE_IN_MILLIS));
Date lowerLimit = new Date(serverDate.getTime() - (TIME_GAP_IN_MINUTES * ONE_MINUTE_IN_MILLIS));
// System.out.println("Server date : " + serverDate);
// System.out.println("Server time : " + serverTime);
PersistenceManager pm = PMF.get().getPersistenceManager();
Query q = pm.newQuery(Train.class);
try {
tempTrains = (List<Train>) q.execute();
List<Stop> tempStops = new ArrayList<Stop>();
for (Train t : tempTrains) {
tempStops = t.getStops();
for (Stop s : tempStops) {
// checking if a selected train stops at the selected
// station
if (s.getStation().equals(station)) {
Date stationTime = parser.parse(s.getTime());
// checking whether the station time is in between the
// required time gap
if (stationTime.after(lowerLimit) && stationTime.before(upperLimit)) {
trains.add(t);
break;
}
}
}
}
} finally {
q.closeAll();
}
// returning a string list instead of the train list
List<String> result = new ArrayList<String>();
for (Train t : trains) {
result.add("From " + t.getStart() + " To " + t.getDestination() + "\n" + t.getTrainid());
}
return result;
// returning the list of train objects
// return trains;
}