/*
 * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 */
package java.util.function;

import java.util.Objects;

/**
 * Represents an operation that accepts a single input argument and returns no
 * result. Unlike most other functional interfaces, {@code Consumer} 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)}.
 *
 * @param <T> the type of the input to the operation
 *
 * @since 1.8
 */
@FunctionalInterface
public interface Consumer<T> {

 /**
 * Performs this operation on the given argument.
 *
 * @param t the input argument
 */
 void accept(T t);

 /**
 * Returns a composed {@code Consumer} 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 Consumer} that performs in sequence this
 * operation followed by the {@code after} operation
 * @throws NullPointerException if {@code after} is null
 */
 default Consumer<T> andThen(Consumer<? super T> after) {
 Objects.requireNonNull(after);
 return (T t) -> { accept(t); after.accept(t); };
 }
}