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package de.lmu.ifi.dbs.elki.database.ids.integer;
/*
This file is part of ELKI:
Environment for Developing KDD-Applications Supported by Index-Structures
Copyright (C) 2014
Ludwig-Maximilians-Universität München
Lehr- und Forschungseinheit für Datenbanksysteme
ELKI Development Team
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
import de.lmu.ifi.dbs.elki.database.ids.DoubleDBIDListIter;
/**
* kNN list, but without automatic sorting. Use with care, as others may expect
* the results to be sorted!
*
* @author Erich Schubert
*/
public class DoubleIntegerDBIDKNNList extends DoubleIntegerDBIDList implements IntegerDBIDKNNList {
/**
* The k value this list was generated for.
*/
final int k;
/**
* Constructor.
*/
public DoubleIntegerDBIDKNNList() {
super();
this.k = -1;
}
/**
* Constructor.
*
* @param k K parameter
* @param size Actual size
*/
public DoubleIntegerDBIDKNNList(final int k, int size) {
super(size);
this.k = k;
}
@Override
public int getK() {
return k;
}
@Override
public double getKNNDistance() {
return (size >= k) ? dists[k - 1] : Double.POSITIVE_INFINITY;
}
@Override
public String toString() {
StringBuilder buf = new StringBuilder();
buf.append("kNNList[");
for(DoubleDBIDListIter iter = this.iter(); iter.valid();) {
buf.append(iter.doubleValue()).append(':').append(iter.internalGetIndex());
iter.advance();
if(iter.valid()) {
buf.append(',');
}
}
buf.append(']');
return buf.toString();
}
}
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