| /* |
| * 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 int}-valued operand that produces |
| * an {@code int}-valued result. This is the primitive type specialization of |
| * {@link UnaryOperator} for {@code int}. |
| * |
| * <p>This is a <a href="package-summary.html">functional interface</a> |
| * whose functional method is {@link #applyAsInt(int)}. |
| * |
| * @see UnaryOperator |
| * @since 1.8 |
| */ |
| @FunctionalInterface |
| public interface IntUnaryOperator { |
| |
| /** |
| * Applies this operator to the given operand. |
| * |
| * @param operand the operand |
| * @return the operator result |
| */ |
| int applyAsInt(int 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(IntUnaryOperator) |
| */ |
| default IntUnaryOperator compose(IntUnaryOperator before) { |
| Objects.requireNonNull(before); |
| return (int v) -> applyAsInt(before.applyAsInt(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(IntUnaryOperator) |
| */ |
| default IntUnaryOperator andThen(IntUnaryOperator after) { |
| Objects.requireNonNull(after); |
| return (int t) -> after.applyAsInt(applyAsInt(t)); |
| } |
| |
| /** |
| * Returns a unary operator that always returns its input argument. |
| * |
| * @return a unary operator that always returns its input argument |
| */ |
| static IntUnaryOperator identity() { |
| return t -> t; |
| } |
| } |