/*
* This is eMonocot, a global online biodiversity information resource.
*
* Copyright © 2011–2015 The Board of Trustees of the Royal Botanic Gardens, Kew and The University of Oxford
*
* eMonocot 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.
*
* eMonocot 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.
*
* The complete text of the GNU Affero General Public License is in the source repository as the file
* ‘COPYING’. It is also available from <http://www.gnu.org/licenses/>.
*/
package org.emonocot.model.compare;
import java.util.Comparator;
import org.emonocot.model.Taxon;
/**
*
* @author ben
*
*/
public class AlphabeticalTaxonComparator implements Comparator<Taxon> {
/**
* @param o1
* the first taxon
* @param o2
* the second taxon
* @return -1 if o1 comes before o2, 1 if o1 comes after o2 and 0 if the two
* regions are equal
*/
public final int compare(final Taxon o1, final Taxon o2) {
int o = 0;
/**
* Nulls last
*/
if (o1.getScientificName() == null) {
if (o1.getScientificName() != o2.getScientificName()) {
return 1;
} else {
return 0;
}
} else if (o2.getScientificName() == null) {
return -1;
} else {
o = o1.getScientificName().compareTo(o2.getScientificName());
}
/**
* Homonyms
*/
if (o == 0) {
if (o1.getScientificNameAuthorship() == null) {
if (o1.getScientificNameAuthorship() != o2.getScientificNameAuthorship()) {
return 1;
} else {
return 0;
}
} else if (o2.getScientificNameAuthorship() == null) {
return -1;
} else {
return o1.getScientificNameAuthorship().compareTo(o2.getScientificNameAuthorship());
}
} else {
return o;
}
}
}