    001/*
    002 * Licensed to the Apache Software Foundation (ASF) under one or more
    003 * contributor license agreements.  See the NOTICE file distributed with
    004 * this work for additional information regarding copyright ownership.
    005 * The ASF licenses this file to You under the Apache License, Version 2.0
    006 * (the "License"); you may not use this file except in compliance with
    007 * the License.  You may obtain a copy of the License at
    008 *
    009 *      http://www.apache.org/licenses/LICENSE-2.0
    010 *
    011 * Unless required by applicable law or agreed to in writing, software
    012 * distributed under the License is distributed on an "AS IS" BASIS,
    013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    014 * See the License for the specific language governing permissions and
    015 * limitations under the License.
    016 */
    017
    018package org.apache.commons.lang3.function;
    019
    020import java.util.Objects;
    021import java.util.function.IntConsumer;
    022
    023/**
    024 * A functional interface like {@link IntConsumer} but for {@code boolean}.
    025 *
    026 * @see IntConsumer
    027 * @since 3.13.0
    028 */
    029@FunctionalInterface
    030public interface BooleanConsumer {
    031
    032    /** NOP singleton */
    033    BooleanConsumer NOP = t -> {/* NOP */};
    034
    035    /**
    036     * Returns The NOP singleton.
    037     *
    038     * @return The NOP singleton.
    039     */
    040    static BooleanConsumer nop() {
    041        return NOP;
    042    }
    043
    044    /**
    045     * Accepts the given arguments.
    046     *
    047     * @param value the input argument
    048     */
    049    void accept(boolean value);
    050
    051    /**
    052     * Returns a composed {@link BooleanConsumer} that performs, in sequence, this operation followed by the {@code after}
    053     * operation. If performing either operation throws an exception, it is relayed to the caller of the composed operation.
    054     * If performing this operation throws an exception, the {@code after} operation will not be performed.
    055     *
    056     * @param after the operation to perform after this operation
    057     * @return a composed {@link BooleanConsumer} that performs in sequence this operation followed by the {@code after}
    058     *         operation
    059     * @throws NullPointerException if {@code after} is null
    060     */
    061    default BooleanConsumer andThen(final BooleanConsumer after) {
    062        Objects.requireNonNull(after);
    063        return (final boolean t) -> {
    064            accept(t);
    065            after.accept(t);
    066        };
    067    }
    068}