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/*
* Copyright 2021-2024 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 icu.easyj.core.convert;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import icu.easyj.core.convert.converter.CharSequenceToDateConverter;
import icu.easyj.core.convert.converter.DateToStringConverter;
import icu.easyj.core.enums.DataType;
import icu.easyj.core.exception.ConvertException;
import org.springframework.core.convert.ConversionException;
import org.springframework.core.convert.TypeDescriptor;
import org.springframework.core.convert.converter.Converter;
import org.springframework.core.convert.support.DefaultConversionService;
import org.springframework.lang.NonNull;
import org.springframework.lang.Nullable;
import org.springframework.util.Assert;
/**
* 转换工具类
*
* @author wangliang181230
*/
public abstract class ConvertUtils {
//region 转换服务
private static final DefaultConversionService CONVERSION_SERVICE;
static {
DefaultConversionService cs = (DefaultConversionService)DefaultConversionService.getSharedInstance();
cs.addConverter(new DateToStringConverter());
cs.addConverter(new CharSequenceToDateConverter());
CONVERSION_SERVICE = cs;
}
/**
* 获取转换服务
*
* @return 转换服务
*/
public static DefaultConversionService getConversionService() {
return CONVERSION_SERVICE;
}
/**
* 添加转换器
*
* @param converter 转换器
*/
public static void addConvert(@NonNull Converter converter) {
Assert.notNull(converter, "'converter' must not be null");
CONVERSION_SERVICE.addConverter(converter);
}
//endregion
//region 转换工具方法
/**
* 判断是否可以转换
*
* @param sourceType 源类型
* @param targetType 目标类型
* @return 是否可以转换
*/
public static boolean canConvert(@Nullable Class sourceType, Class targetType) {
return getConversionService().canConvert(sourceType, targetType);
}
/**
* 判断是否可以转换
*
* @param sourceType 源类型
* @param targetType 目标类型
* @return 是否可以转换
*/
public static boolean canConvert(@Nullable TypeDescriptor sourceType, TypeDescriptor targetType) {
return getConversionService().canConvert(sourceType, targetType);
}
/**
* 判断是否可以转换
*
* @param sourceType 源类型
* @param targetType 目标类型
* @return 是否可以转换
*/
public static boolean canConvert(@Nullable DataType sourceType, DataType targetType) {
if (sourceType == null) {
return true;
} else {
Assert.notNull(targetType, "'targetType' must not be null");
return canConvert(sourceType.getTypeDesc(), targetType.getTypeDesc());
}
}
/**
* 转换
*
* @param source 源对象
* @param targetClass 目标类
* @param 目标类型
* @return 转换后的目标类对象
* @throws ConvertException 转换失败时，抛出该异常
*/
public static T convert(@Nullable Object source, Class targetClass) {
if (source == null) {
return null;
}
if (Object.class.equals(targetClass)) {
return (T)source;
}
try {
return getConversionService().convert(source, targetClass);
} catch (ConversionException | IllegalArgumentException e) {
throw new ConvertException("数据转换失败", e);
}
}
/**
* 转换
*
* @param source 源对象
* @param targetType 目标类描述
* @param 目标类型
* @return 转换后的目标类对象
*/
public static T convert(@Nullable Object source, TypeDescriptor targetType) {
if (source == null) {
return null;
}
try {
return (T)getConversionService().convert(source, targetType);
} catch (ConversionException | IllegalArgumentException e) {
throw new ConvertException("数据转换失败", e);
}
}
/**
* 转换
*
* @param source 源对象
* @param targetType 目标类描述
* @param 目标类型
* @return 转换后的目标类对象
*/
public static T convert(@Nullable Object source, DataType targetType) {
if (source == null) {
return null;
}
Assert.notNull(targetType, "'targetType' must not be null");
return convert(source, targetType.getTypeDesc());
}
/**
* 转换
*
* @param source 源对象
* @param targetClass 目标类
* @param defaultValue 转换失败时，返回的默认值
* @param 目标类型
* @return 转换后的目标类对象
*/
public static T convert(@Nullable Object source, Class targetClass, @Nullable T defaultValue) {
if (source == null) {
return defaultValue;
}
try {
return convert(source, targetClass);
} catch (ConvertException e) {
return defaultValue;
}
}
/**
* 转换
*
* @param source 源对象
* @param targetType 目标类描述
* @param defaultValue 转换失败时，返回的默认值
* @param 目标类型
* @return 转换后的目标类对象
*/
public static T convert(@Nullable Object source, TypeDescriptor targetType, @Nullable T defaultValue) {
if (source == null) {
return defaultValue;
}
try {
return convert(source, targetType);
} catch (ConvertException e) {
return defaultValue;
}
}
/**
* 转换
*
* @param source 源对象
* @param targetType 目标类描述
* @param defaultValue 转换失败时，返回的默认值
* @param 目标类型
* @return 转换后的目标类对象
*/
public static T convert(@Nullable Object source, DataType targetType, @Nullable T defaultValue) {
if (source == null) {
return defaultValue;
}
Assert.notNull(targetType, "'targetType' must not be null");
return convert(source, targetType.getTypeDesc(), defaultValue);
}
/**
* 转换列表数据
*
* @param sourceList 源对象列表
* @param targetClass 目标类
* @param 目标类型
* @return 转换后的目标类对象列表
*/
@NonNull
public static List convertList(@Nullable Collection sourceList, Class targetClass) {
List list = new ArrayList<>();
if (sourceList != null) {
for (Object source : sourceList) {
list.add(convert(source, targetClass));
}
}
return list;
}
/**
* 转换列表数据
*
* @param sourceList 源对象列表
* @param targetType 目标类描述
* @param 目标类型
* @return 转换后的目标类对象列表
*/
@NonNull
public static List convertList(@Nullable Collection sourceList, TypeDescriptor targetType) {
List list = new ArrayList<>();
if (sourceList != null) {
for (Object source : sourceList) {
list.add(convert(source, targetType));
}
}
return list;
}
/**
* 转换列表数据
*
* @param sourceList 源对象列表
* @param targetType 目标类描述
* @param 目标类型
* @return 转换后的目标类对象列表
*/
@NonNull
public static List convertList(@Nullable Collection sourceList, DataType targetType) {
if (sourceList == null) {
return new ArrayList<>();
}
Assert.notNull(targetType, "'targetType' must not be null");
return convertList(sourceList, targetType.getTypeDesc());
}
//endregion
}