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}