/*
* 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 on a single {@code long}-valued operand that produces
* a {@code long}-valued result. This is the primitive type specialization of
* {@link UnaryOperator} for {@code long}.
*
* <p>This is a <a href="package-summary.html">functional interface</a>
* whose functional method is {@link #applyAsLong(long)}.
*
* @see UnaryOperator
* @since 1.8
*/
@FunctionalInterface
public interface LongUnaryOperator {
/**
* Applies this operator to the given operand.
*
* @param operand the operand
* @return the operator result
*/
long applyAsLong(long operand);
/**
* Returns a composed operator that first applies the {@code before}
* operator to its input, and then applies this operator to the result.
* If evaluation of either operator throws an exception, it is relayed to
* the caller of the composed operator.
*
* @param before the operator to apply before this operator is applied
* @return a composed operator that first applies the {@code before}
* operator and then applies this operator
* @throws NullPointerException if before is null
*
* @see #andThen(LongUnaryOperator)
*/
default LongUnaryOperator compose(LongUnaryOperator before) {
Objects.requireNonNull(before);
return (long v) -> applyAsLong(before.applyAsLong(v));
}
/**
* Returns a composed operator that first applies this operator to
* its input, and then applies the {@code after} operator to the result.
* If evaluation of either operator throws an exception, it is relayed to
* the caller of the composed operator.
*
* @param after the operator to apply after this operator is applied
* @return a composed operator that first applies this operator and then
* applies the {@code after} operator
* @throws NullPointerException if after is null
*
* @see #compose(LongUnaryOperator)
*/
/**代码未完, 请加载全部代码(NowJava.com).**/