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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) 2013
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.distance.DistanceDBIDPair;
import de.lmu.ifi.dbs.elki.database.ids.distance.DoubleDistanceDBIDPair;
import de.lmu.ifi.dbs.elki.distance.distancevalue.DoubleDistance;
import de.lmu.ifi.dbs.elki.utilities.Util;
/**
* Class storing a double distance a DBID.
*
* @author Erich Schubert
*/
class DoubleDistanceIntegerDBIDPair implements DoubleDistanceDBIDPair, IntegerDBIDRef {
/**
* The distance value.
*/
final double distance;
/**
* The integer DBID.
*/
final int id;
/**
* Constructor.
*
* @param distance Distance value
* @param id integer object ID
*/
protected DoubleDistanceIntegerDBIDPair(double distance, int id) {
super();
this.distance = distance;
this.id = id;
}
@Override
public double doubleDistance() {
return distance;
}
@Override
@Deprecated
public DoubleDistance getDistance() {
return new DoubleDistance(distance);
}
@Override
public int internalGetIndex() {
return id;
}
@Override
public int compareByDistance(DistanceDBIDPair<DoubleDistance> o) {
if (o instanceof DoubleDistanceDBIDPair) {
return Double.compare(distance, ((DoubleDistanceDBIDPair) o).doubleDistance());
}
return Double.compare(distance, o.getDistance().doubleValue());
}
@Override
public String toString() {
return distance + ":" + id;
}
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (o instanceof DoubleDistanceIntegerDBIDPair) {
DoubleDistanceIntegerDBIDPair p = (DoubleDistanceIntegerDBIDPair) o;
return (this.id == p.id) && (Double.compare(this.distance, p.distance) == 0);
}
if (o instanceof DistanceIntegerDBIDPair) {
DistanceIntegerDBIDPair<?> p = (DistanceIntegerDBIDPair<?>) o;
if (p.distance instanceof DoubleDistance) {
return (this.id == p.id) && (Double.compare(this.distance, ((DoubleDistance) p.distance).doubleValue()) == 0);
}
}
return false;
}
@Override
public int hashCode() {
long bits = Double.doubleToLongBits(distance);
return Util.mixHashCodes((int) (bits ^ (bits >>> 32)), id);
}
}
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