001/*
002 * Copyright 2012-2018 the original author or authors.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *      http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package org.springframework.boot.convert;
018
019import java.lang.annotation.Documented;
020import java.lang.annotation.ElementType;
021import java.lang.annotation.Retention;
022import java.lang.annotation.RetentionPolicy;
023import java.lang.annotation.Target;
024import java.time.Duration;
025import java.time.temporal.ChronoUnit;
026
027/**
028 * Annotation that can be used to change the default unit used when converting a
029 * {@link Duration}.
030 *
031 * @author Phillip Webb
032 * @since 2.0.0
033 */
034@Target(ElementType.FIELD)
035@Retention(RetentionPolicy.RUNTIME)
036@Documented
037public @interface DurationUnit {
038
039        /**
040         * The duration unit to use if one is not specified.
041         * @return the duration unit
042         */
043        ChronoUnit value();
044
045}