public DoubleDBIDList getRKNN ( DBIDRef id ) { TreeSet < DoubleDBIDPair > rKNN = materialized_RkNN . get ( id ) ; if ( rKNN == null ) { return null ; } ModifiableDoubleDBIDList ret = DBIDUtil . newDistanceDBIDList ( rKNN . size ( ) ) ; for ( DoubleDBIDPair pair : rKNN ) { ret . add ( pair ) ; } ret . sort ( ) ; return ret ; }
Returns the materialized RkNNs of the specified id .