spring StringToPeriodConverter 源码

2022-08-12
浏览 (532)

springboot StringToPeriodConverter 代码

文件路径：/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/convert/StringToPeriodConverter.java

/*
 * Copyright 2012-2020 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.boot.convert;

import java.time.Period;
import java.time.temporal.ChronoUnit;
import java.util.Collections;
import java.util.Set;

import org.springframework.core.convert.TypeDescriptor;
import org.springframework.core.convert.converter.Converter;
import org.springframework.core.convert.converter.GenericConverter;
import org.springframework.util.ObjectUtils;

/**
 * {@link Converter} to convert from a {@link String} to a {@link Period}. Supports
 * {@link Period#parse(CharSequence)} as well a more readable form.
 *
 * @author Eddú Meléndez
 * @author Edson Chávez
 * @see PeriodFormat
 * @see PeriodUnit
 */
final class StringToPeriodConverter implements GenericConverter {

	@Override
	public Set<GenericConverter.ConvertiblePair> getConvertibleTypes() {
		return Collections.singleton(new GenericConverter.ConvertiblePair(String.class, Period.class));
	}

	@Override
	public Object convert(Object source, TypeDescriptor sourceType, TypeDescriptor targetType) {
		if (ObjectUtils.isEmpty(source)) {
			return null;
		}
		return convert(source.toString(), getStyle(targetType), getPeriodUnit(targetType));
	}

	private PeriodStyle getStyle(TypeDescriptor targetType) {
		PeriodFormat annotation = targetType.getAnnotation(PeriodFormat.class);
		return (annotation != null) ? annotation.value() : null;
	}

	private ChronoUnit getPeriodUnit(TypeDescriptor targetType) {
		PeriodUnit annotation = targetType.getAnnotation(PeriodUnit.class);
		return (annotation != null) ? annotation.value() : null;
	}

	private Period convert(String source, PeriodStyle style, ChronoUnit unit) {
		style = (style != null) ? style : PeriodStyle.detect(source);
		return style.parse(source, unit);
	}

}

相关信息

spring 源码目录

相关文章

spring ApplicationConversionService 源码

spring ArrayToDelimitedStringConverter 源码

spring CharArrayFormatter 源码

spring CharSequenceToObjectConverter 源码

spring CollectionToDelimitedStringConverter 源码

spring DataSizeUnit 源码

spring DelimitedStringToArrayConverter 源码

spring DelimitedStringToCollectionConverter 源码

spring Delimiter 源码

spring DurationFormat 源码

0 赞

所属分类： 后端技术
本文标签： Spring Boot Java Spring
版权声明： 原创文章如转载，请注明本文链接: https://m.seaxiang.com/blog/e5bd38dd05c343fe98a0e5a6c7d8ec33

热门推荐

1、直接访问google.com
2、 - 优质文章
3、 gate.io
4、 harmony 鸿蒙hdc使用指导
5、 harmony 鸿蒙初识ArkTS语言
6、 flink kafka connector scan.startup.mode 的几个选项
7、 harmony 鸿蒙ArkUI组件（ArkTS）开发常见问题
8、 golang
9、 openharmony
10、 Vue中input框自动聚焦

Loading...