/**
* Copies all the distance functors from <code>from</code> attribute type to <code>to</code>
* attribute type.
*
* @param to the attribute type to get the copies
* @param from the attribute type to receive the distance functor references
*/
public static final void useSameDistances(String to, String from) {
check(from);
Map<String, Distance> fromValues = distanceMap.get(from);
Map<String, Distance> toValues = distanceMap.get(to);
if (fromValues != null) {
if (toValues != null) {
toValues.putAll(fromValues);
} else {
toValues = new HashMap<String, Distance>();
toValues.putAll(fromValues);
distanceMap.put(to, toValues);
}
}
}
