/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch licenses this file to you 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.elasticsearch.common.util;
import java.util.Comparator;
/**
* {@link Comparator}-related utility methods.
*/
public enum Comparators {
;
/**
* Compare <code>d1</code> against <code>d2</code>, pushing {@value Double#NaN} at the bottom.
*/
public static int compareDiscardNaN(double d1, double d2, boolean asc) {
if (Double.isNaN(d1)) {
return Double.isNaN(d2) ? 0 : 1;
} else if (Double.isNaN(d2)) {
return -1;
} else {
return asc ? Double.compare(d1, d2) : Double.compare(d2, d1);
}
}
}