/*
* Constellation - An open source and standard compliant SDI
* http://www.constellation-sdi.org
*
* (C) 2012, Geomatys
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*/
package org.geotoolkit.observation.xml;
import java.util.Comparator;
import java.util.Date;
import org.opengis.observation.Observation;
import org.opengis.temporal.Instant;
import org.opengis.temporal.Period;
/**
*
* @author Guilhem Legal (Geomatys)
*/
public class ObservationComparator implements Comparator<Observation> {
@Override
public int compare(Observation o1, Observation o2) {
if (o1.getSamplingTime() != null && o1.getSamplingTime() != null) {
final Date timeBegin1;
if (o1.getSamplingTime() instanceof Period) {
timeBegin1 = ((Period)o1.getSamplingTime()).getBeginning().getDate();
} else if (o1.getSamplingTime() instanceof Instant) {
timeBegin1 = ((Instant)o1.getSamplingTime()).getDate();
} else {
throw new IllegalArgumentException("Unexpected time Object:" + o1.getSamplingTime());
}
final Date timeBegin2;
if (o2.getSamplingTime() instanceof Period) {
timeBegin2 = ((Period)o2.getSamplingTime()).getBeginning().getDate();
} else if (o2.getSamplingTime() instanceof Instant) {
timeBegin2 = ((Instant)o2.getSamplingTime()).getDate();
} else {
throw new IllegalArgumentException("Unexpected time Object:" + o2.getSamplingTime());
}
return timeBegin1.compareTo(timeBegin2);
} else if (o1.getSamplingTime() != null) {
return -1;
} else if (o2.getSamplingTime() != null) {
return 1;
} else {
return 0;
}
}
}