| /* |
| * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code 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 General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| package java.util.function; |
| |
| import java.util.Objects; |
| |
| /** |
| * Represents an operation that accepts two input arguments and returns no |
| * result. This is the two-arity specialization of {@link Consumer}. |
| * Unlike most other functional interfaces, {@code BiConsumer} is expected |
| * to operate via side-effects. |
| * |
| * <p>This is a <a href="package-summary.html">functional interface</a> |
| * whose functional method is {@link #accept(Object, Object)}. |
| * |
| * @param <T> the type of the first argument to the operation |
| * @param <U> the type of the second argument to the operation |
| * |
| * @see Consumer |
| * @since 1.8 |
| */ |
| @FunctionalInterface |
| public interface BiConsumer<T, U> { |
| |
| /** |
| * Performs this operation on the given arguments. |
| * |
| * @param t the first input argument |
| * @param u the second input argument |
| */ |
| void accept(T t, U u); |
| |
| /** |
| * Returns a composed {@code BiConsumer} that performs, in sequence, this |
| * operation followed by the {@code after} operation. If performing either |
| * operation throws an exception, it is relayed to the caller of the |
| * composed operation. If performing this operation throws an exception, |
| * the {@code after} operation will not be performed. |
| * |
| * @param after the operation to perform after this operation |
| * @return a composed {@code BiConsumer} that performs in sequence this |
| * operation followed by the {@code after} operation |
| * @throws NullPointerException if {@code after} is null |
| */ |
| default BiConsumer<T, U> andThen(BiConsumer<? super T, ? super U> after) { |
| Objects.requireNonNull(after); |
| |
| return (l, r) -> { |
| accept(l, r); |
| after.accept(l, r); |
| }; |
| } |
| } |