@Override
protected void map(LongWritable key, Text value, Context context)
throws IOException, InterruptedException {
String line = value.toString();
StringTokenizer tokenizer = new StringTokenizer(line, " ");
int dim = tokenizer.countTokens();
double[] coords = new double[dim];
for (int i = 0; i < dim; i++) {
coords[i] = Double.valueOf(tokenizer.nextToken());
}
Point point = new Point(coords);
Centroid nearest = null;
double nearestDistance = Double.MAX_VALUE;
for (Centroid c : centers) {
double dist = point.euclideanDistance(c);
if (nearest == null) {
nearest = c;
nearestDistance = dist;
} else {
if (dist < nearestDistance) {
nearest = c;
nearestDistance = dist;
}
}
}
context.write(nearest, point);
}
@Override
protected void map(Centroid key, Point value, Context context)
throws IOException, InterruptedException {
Centroid nearest = null;
double nearestDistance = Double.MAX_VALUE;
for (Centroid c : centers) {
double dist = value.euclideanDistance(c);
if (nearest == null) {
nearest = c;
nearestDistance = dist;
} else {
if (dist < nearestDistance) {
nearest = c;
nearestDistance = dist;
}
}
}
context.write(nearest, value);
}