| /* |
| * Copyright 2015 Google Inc. |
| * |
| * 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 java.util.function; |
| |
| import java.util.Comparator; |
| |
| import static javaemul.internal.InternalPreconditions.checkCriticalNotNull; |
| |
| /** |
| * See <a href="https://docs.oracle.com/javase/8/docs/api/java/util/function/BinaryOperator.html"> |
| * the official Java API doc</a> for details. |
| * |
| * @param <T> type of both operands and the result |
| */ |
| @FunctionalInterface |
| public interface BinaryOperator<T> extends BiFunction<T, T, T> { |
| |
| static <T> BinaryOperator<T> maxBy(Comparator<? super T> comparator) { |
| checkCriticalNotNull(comparator); |
| return (t, u) -> comparator.compare(t, u) <= 0 ? u : t; |
| } |
| |
| static <T> BinaryOperator<T> minBy(Comparator<? super T> comparator) { |
| checkCriticalNotNull(comparator); |
| return (t, u) -> comparator.compare(t, u) <= 0 ? t : u; |
| } |
| } |