author | mduigou |
Fri, 17 May 2013 10:36:04 -0700 | |
changeset 17695 | 032254f2467b |
parent 16011 | 890a7ed97f6c |
child 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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* An operation on a single {@code long} operand yielding a {@code long} result. |
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* This is the primitive type specialization of {@link UnaryOperator} for |
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* {@code long}. |
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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 LongUnaryOperator { |
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/** |
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* Returns the {@code long} result of the operation upon the {@code long} |
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* operand. |
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* |
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* @param operand the operand value |
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* @return the operation result value |
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*/ |
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long applyAsLong(long operand); |
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|
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/** |
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* Compose a new function which applies the provided function followed by |
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* this function. If either function throws an exception, it is relayed |
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* to the caller. |
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* |
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* @param before An additional function to be applied before this function |
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* is applied |
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* @return A function which performs the provided function followed by this |
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* function |
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* @throws NullPointerException if before is null |
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*/ |
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default LongUnaryOperator compose(LongUnaryOperator before) { |
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Objects.requireNonNull(before); |
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return (long v) -> applyAsLong(before.applyAsLong(v)); |
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} |
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/** |
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* Compose a new function which applies this function followed by the |
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* provided function. If either function throws an exception, it is relayed |
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* to the caller. |
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* |
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* @param after An additional function to be applied after this function is |
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* applied |
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* @return A function which performs this function followed by the provided |
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* function followed |
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* @throws NullPointerException if after is null |
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*/ |
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default LongUnaryOperator andThen(LongUnaryOperator after) { |
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Objects.requireNonNull(after); |
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return (long t) -> after.applyAsLong(applyAsLong(t)); |
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} |
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/** |
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* Returns a unary operator that provides its input value as the result. |
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* |
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* @return a unary operator that provides its input value as the result |
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*/ |
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static LongUnaryOperator identity() { |
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return t -> t; |
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} |
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} |