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package de.lmu.ifi.dbs.elki.utilities.pairs;
/*
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/>.
*/
/**
* Triple with canonical comparison function.
*
* @author Erich Schubert
*
* @param <FIRST> first type
* @param <SECOND> second type
* @param <THIRD> second type
*/
public final class CTriple<FIRST extends Comparable<? super FIRST>, SECOND extends Comparable<? super SECOND>, THIRD extends Comparable<? super THIRD>> extends Triple<FIRST, SECOND, THIRD> implements Comparable<CTriple<FIRST, SECOND, THIRD>> {
/**
* Constructor with fields
*
* @param first Value of first component
* @param second Value of second component
* @param third Value of third component
*/
public CTriple(FIRST first, SECOND second, THIRD third) {
super(first, second, third);
}
/**
* Canonical toString operator
*/
@Override
public String toString() {
return "Triple(" + first.toString() + ", " + second.toString() + ", " + third.toString() + ")";
}
/**
* Generic derived compare function.
*
* @param other Object to compare to
* @return comparison result
*/
@Override
public int compareTo(CTriple<FIRST, SECOND, THIRD> other) {
// try comparing by first
if(this.first != null) {
if(other.first == null) {
return -1;
}
int delta1 = this.first.compareTo(other.first);
if(delta1 != 0) {
return delta1;
}
}
else if(other.first != null) {
return +1;
}
// try comparing by second
if(this.second != null) {
if(other.second == null) {
return -1;
}
int delta2 = this.second.compareTo(other.second);
if(delta2 != 0) {
return delta2;
}
}
else if(other.second != null) {
return +1;
}
// try comparing by third
if(this.third != null) {
if(other.third == null) {
return -1;
}
int delta3 = this.third.compareTo(other.third);
if(delta3 != 0) {
return delta3;
}
}
else if(other.third != null) {
return +1;
}
return 0;
}
}
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