/**
* Filter for nodes.
*
* @param nodes input set of nodes
* @return set of filtered nodes
*/
public Vector filter(Vector nodes) {
SortedVector result = new SortedVector();
Vector filtered = new Vector();
for (int i = 0; i < nodes.size(); i++) result = addNode((Node) nodes.get(i), result);
for (int i = 0; i < result.size(); i++) filtered.add(((NodeDistance) result.get(0)).node);
return filtered;
}
