tech.tablesaw.util.ReverseLongComparator Maven / Gradle / Ivy
/*
* 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 tech.tablesaw.util;
import it.unimi.dsi.fastutil.longs.LongComparator;
import javax.annotation.concurrent.Immutable;
/**
* A comparator for long primitives for sorting in descending order
*/
@Immutable
public final class ReverseLongComparator {
static final LongComparator reverseLongComparator = new LongComparator() {
@Override
public int compare(Long o2, Long o1) {
return (o1 < o2 ? -1 : (o1.equals(o2) ? 0 : 1));
}
@Override
public int compare(long o2, long o1) {
return (o1 < o2 ? -1 : (o1 == o2 ? 0 : 1));
}
};
public static LongComparator instance() {
return reverseLongComparator;
}
}