/*
* $Id$
* This file is a part of the Arakhne Foundation Classes, http://www.arakhne.org/afc
*
* Copyright (c) 2000-2012 Stephane GALLAND.
* Copyright (c) 2005-10, Multiagent Team, Laboratoire Systemes et Transports,
* Universite de Technologie de Belfort-Montbeliard.
* Copyright (c) 2013-2016 The original authors, and other authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.arakhne.afc.util;
import java.util.Comparator;
import org.eclipse.xtext.xbase.lib.Pure;
/** Comparator which is using the natural order of the elements, i.e.
* the elements must implements {@link Comparable}
*
* @param <OBJECT> is the type of the objects to compare to.
* @author $Author: sgalland$
* @version $FullVersion$
* @mavengroupid $GroupId$
* @mavenartifactid $ArtifactId$
*/
public class NaturalOrderComparator<OBJECT> implements Comparator<OBJECT> {
@Pure
@Override
@SuppressWarnings({ "unchecked", "rawtypes" })
public int compare(OBJECT o1, OBJECT o2) {
if (o1 == o2) {
return 0;
}
if (o1 == null) {
return Integer.MIN_VALUE;
}
if (o2 == null) {
return Integer.MAX_VALUE;
}
try {
return ((Comparable) o1).compareTo(o2);
} catch (Throwable exception) {
//
}
try {
return -((Comparable) o2).compareTo(o1);
} catch (Throwable exception) {
//
}
throw new UnsupportedNaturalOrderException(o1);
}
}