@Override
protected void reduce(Centroid key, Iterable<Point> values, Context context)
throws IOException, InterruptedException {
ArrayList<Point> points = new ArrayList<Point>();
points.clear();
int clusterId = key.id;
Point newCenter = null;
for (Point p : values) {
Point copy = p.deepCopy();
points.add(copy);
if (newCenter == null) {
newCenter = new Point(copy.deepCopy());
} else {
newCenter = newCenter.add(copy);
}
}
Centroid center = new Centroid(clusterId, newCenter);
for (Point p : points) {
context.write(center, p);
}
}
