/**
* @param t the timed value
* @return the partitions IDs, or null if the element either 1) does not satisfy the "condition"
* 2) is not part of any one of the partitions.
*/
public List<Integer> evalPartitionsOn(Timed<T> t) {
// check condition
if (!condition.apply(t.getValue())) return null;
// finds ids for each partition
ArrayList<Integer> ids = new ArrayList<Integer>();
for (Named<Partition<Timed<T>>> p : partitions) {
int id = p.getValue().toID(t);
if (id == Partition.INVALID_ID) return null;
ids.add(id);
}
return ids;
}