author | psandoz |
Tue, 13 Aug 2013 11:16:37 +0200 | |
changeset 19424 | c4524285927f |
parent 19040 | 7b25fde2a4ed |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package java.util.function; |
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||
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import java.util.Objects; |
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/** |
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* Represents an operation on a single {@code int}-valued operand that produces |
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* an {@code int}-valued result. This is the primitive type specialization of |
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* {@link UnaryOperator} for {@code int}. |
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* |
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* <p>This is a <a href="package-summary.html">functional interface</a> |
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* whose functional method is {@link #applyAsInt(int)}. |
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* |
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* @see UnaryOperator |
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* @since 1.8 |
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*/ |
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@FunctionalInterface |
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public interface IntUnaryOperator { |
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/** |
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* Applies this operator to the given operand. |
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* |
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* @param operand the operand |
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* @return the operator result |
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*/ |
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int applyAsInt(int operand); |
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/** |
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* Returns a composed operator that first applies the {@code before} |
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* operator to its input, and then applies this operator to the result. |
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* If evaluation of either operator throws an exception, it is relayed to |
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* the caller of the composed operator. |
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* |
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* @param before the operator to apply before this operator is applied |
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* @return a composed operator that first applies the {@code before} |
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* operator and then applies this operator |
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* @throws NullPointerException if before is null |
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* |
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* @see #andThen(IntUnaryOperator) |
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*/ |
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default IntUnaryOperator compose(IntUnaryOperator before) { |
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Objects.requireNonNull(before); |
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return (int v) -> applyAsInt(before.applyAsInt(v)); |
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} |
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/** |
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* Returns a composed operator that first applies this operator to |
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* its input, and then applies the {@code after} operator to the result. |
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* If evaluation of either operator throws an exception, it is relayed to |
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* the caller of the composed operator. |
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* |
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* @param after the operator to apply after this operator is applied |
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* @return a composed operator that first applies this operator and then |
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* applies the {@code after} operator |
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* @throws NullPointerException if after is null |
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* |
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* @see #compose(IntUnaryOperator) |
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*/ |
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default IntUnaryOperator andThen(IntUnaryOperator after) { |
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Objects.requireNonNull(after); |
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return (int t) -> after.applyAsInt(applyAsInt(t)); |
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} |
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/** |
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* Returns a unary operator that always returns its input argument. |
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* |
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* @return a unary operator that always returns its input argument |
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*/ |
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static IntUnaryOperator identity() { |
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return t -> t; |
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} |
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} |