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Elasticsearch subproject :server
/*
* Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
* or more contributor license agreements. Licensed under the Elastic License
* 2.0 and the Server Side Public License, v 1; you may not use this file except
* in compliance with, at your election, the Elastic License 2.0 or the Server
* Side Public License, v 1.
*/
package org.elasticsearch.search.sort;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.io.stream.StreamOutput;
import org.elasticsearch.common.io.stream.Writeable;
import org.elasticsearch.common.lucene.Lucene;
import java.io.IOException;
import java.util.Comparator;
import java.util.Objects;
/**
* A class that encapsulates a minimum and a maximum, that are of the same type and {@link Comparable}.
*/
public class MinAndMax> implements Writeable {
private final T minValue;
private final T maxValue;
public MinAndMax(T minValue, T maxValue) {
this.minValue = Objects.requireNonNull(minValue);
this.maxValue = Objects.requireNonNull(maxValue);
}
@SuppressWarnings("unchecked")
public MinAndMax(StreamInput in) throws IOException {
this.minValue = (T) Lucene.readSortValue(in);
this.maxValue = (T) Lucene.readSortValue(in);
}
@Override
public void writeTo(StreamOutput out) throws IOException {
Lucene.writeSortValue(out, minValue);
Lucene.writeSortValue(out, maxValue);
}
/**
* Return the minimum value.
*/
public T getMin() {
return minValue;
}
/**
* Return the maximum value.
*/
public T getMax() {
return maxValue;
}
/**
* Return a {@link Comparator} for {@link MinAndMax} values according to the provided {@link SortOrder}.
*/
public static > Comparator> getComparator(SortOrder order) {
Comparator> cmp = order == SortOrder.ASC
? Comparator.comparing(MinAndMax::getMin)
: Comparator.comparing(MinAndMax::getMax);
if (order == SortOrder.DESC) {
cmp = cmp.reversed();
}
return Comparator.nullsLast(cmp);
}
}