private Map<Integer, List<ApSet>> createApSetsByFingerprintId() {
Map<Integer, List<ApSet>> fingerprintsMap = new TreeMap<Integer, List<ApSet>>();
for (ApSet apSet : apSets) {
if (fingerprintsMap.get(apSet.getFingerprintId()) == null) {
fingerprintsMap.put(apSet.getFingerprintId(),
new ArrayList<ApSet>());
}
fingerprintsMap.get(apSet.getFingerprintId()).add(apSet);
}
return fingerprintsMap;
}
private List<ApSet> createAllApSetsFromExternalFile() throws IOException {
List<ApSet> result = new ArrayList<ApSet>();
String fileName = "ap_set.csv";
InputStream is = context.getAssets().open(fileName);
InputStreamReader isr = new InputStreamReader(is);
BufferedReader br = new BufferedReader(isr);
String readStr;
br.readLine(); // 첫 줄 버림.
while ((readStr = br.readLine()) != null) {
String[] tokens = readStr.split(delimiter);
ApSet apSet = new ApSet();
apSet.setFingerprintId(Integer.parseInt(tokens[0]));
apSet.setApId(Integer.parseInt(tokens[1]));
apSet.setSignalStrength(Integer.parseInt(tokens[2]));
result.add(apSet);
}
return result;
}
private void createRepresentativeFingerprintAndApSet() throws IOException {
Map<String, Fingerprint> newFingerprintByCoordinateMap = new HashMap<String, Fingerprint>();
List<ApSet> newApSets = new ArrayList<ApSet>();
Map<Integer, List<ApSet>> newApSetsByFingerprintIdMap = new TreeMap<Integer, List<ApSet>>();
int fingerprintId = 1;
Fingerprint f;
Timestamp time;
Double x;
Double y;
Double z;
for (String coordinate : fingerprintsByCoordinateMap.keySet()) {
f = fingerprintsByCoordinateMap.get(coordinate).get(0);
time = f.getTime();
x = f.getX();
y = f.getY();
z = f.getZ();
Map<Integer, List<Integer>> signalsByApId = new TreeMap<Integer, List<Integer>>();
for (Fingerprint fingerprint : fingerprintsByCoordinateMap
.get(coordinate)) {
List<ApSet> apSets = apSetsByFingerprintIdMap.get(fingerprint
.getId());
if (apSets == null) {
continue;
}
for (ApSet apSet : apSets) {
if (signalsByApId.get(apSet.getApId()) == null) {
signalsByApId.put(apSet.getApId(),
new ArrayList<Integer>());
}
signalsByApId.get(apSet.getApId()).add(
apSet.getSignalStrength());
}
}
List<ApSet> representiveApSet = new ArrayList<ApSet>();
for (Integer apId : signalsByApId.keySet()) {
Integer avgSignalStrength = 0;
for (Integer signalStrength : signalsByApId.get(apId)) {
avgSignalStrength = avgSignalStrength + signalStrength;
}
avgSignalStrength = (int) ((double) avgSignalStrength / (double) signalsByApId
.get(apId).size());
representiveApSet.add(new ApSet(fingerprintId, apId,
avgSignalStrength));
}
newApSets.addAll(representiveApSet);
Fingerprint representiveFingerprint = new Fingerprint(
fingerprintId, time, x, y, z);
this.fingerprints.add(representiveFingerprint);
this.fingerprintByFingerprintIdMap.put(fingerprintId,
representiveFingerprint);
newFingerprintByCoordinateMap.put(coordinate,
representiveFingerprint);
newApSetsByFingerprintIdMap.put(fingerprintId, representiveApSet);
fingerprintId++;
}
this.apSets = newApSets;
this.representativeFingerprintByCoordinateMap = newFingerprintByCoordinateMap;
this.apSetsByFingerprintIdMap = newApSetsByFingerprintIdMap;
}