1607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller/* 2607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved. 3607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller * 5607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller * This code is free software; you can redistribute it and/or modify it 6607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller * under the terms of the GNU General Public License version 2 only, as 7607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller * published by the Free Software Foundation. Oracle designates this 8607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller * particular file as subject to the "Classpath" exception as provided 9607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller * by Oracle in the LICENSE file that accompanied this code. 10607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller * 11607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller * This code is distributed in the hope that it will be useful, but WITHOUT 12607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller * version 2 for more details (a copy is included in the LICENSE file that 15607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller * accompanied this code). 16607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller * 17607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller * You should have received a copy of the GNU General Public License version 18607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller * 2 along with this work; if not, write to the Free Software Foundation, 19607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller * 21607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller * or visit www.oracle.com if you need additional information or have any 23607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller * questions. 24607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller */ 25607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fullerpackage java.util.function; 26607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller 27607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fullerimport java.util.Objects; 28607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller 29607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller/** 30607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller * Represents an operation that accepts two input arguments and returns no 31607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller * result. This is the two-arity specialization of {@link Consumer}. 32607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller * Unlike most other functional interfaces, {@code BiConsumer} is expected 33607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller * to operate via side-effects. 34607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller * 35607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller * <p>This is a <a href="package-summary.html">functional interface</a> 36607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller * whose functional method is {@link #accept(Object, Object)}. 37607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller * 38607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller * @param <T> the type of the first argument to the operation 39607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller * @param <U> the type of the second argument to the operation 40607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller * 41607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller * @see Consumer 42607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller * @since 1.8 43607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller */ 44607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller@FunctionalInterface 45607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fullerpublic interface BiConsumer<T, U> { 46607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller 47607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller /** 48607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller * Performs this operation on the given arguments. 49607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller * 50607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller * @param t the first input argument 51607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller * @param u the second input argument 52607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller */ 53607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller void accept(T t, U u); 54607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller 55607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller /** 56607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller * Returns a composed {@code BiConsumer} that performs, in sequence, this 57607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller * operation followed by the {@code after} operation. If performing either 58607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller * operation throws an exception, it is relayed to the caller of the 59607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller * composed operation. If performing this operation throws an exception, 60607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller * the {@code after} operation will not be performed. 61607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller * 62607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller * @param after the operation to perform after this operation 63607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller * @return a composed {@code BiConsumer} that performs in sequence this 64607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller * operation followed by the {@code after} operation 65607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller * @throws NullPointerException if {@code after} is null 66607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller */ 67607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller default BiConsumer<T, U> andThen(BiConsumer<? super T, ? super U> after) { 68607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller Objects.requireNonNull(after); 69607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller 70607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller return (l, r) -> { 71607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller accept(l, r); 72607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller after.accept(l, r); 73607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller }; 74607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller } 75607050af5a16c46ae53ff4d2c3f47b4ef694b559Neil Fuller} 76