org.dromara.hutool.extra.spring.cglib.BeanCopierCache Maven / Gradle / Ivy
/*
* Copyright (c) 2013-2024 Hutool Team and hutool.cn
*
* 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
*
* http://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.dromara.hutool.extra.spring.cglib;
import org.dromara.hutool.core.map.reference.WeakConcurrentMap;
import org.dromara.hutool.core.text.StrUtil;
import org.springframework.cglib.beans.BeanCopier;
import org.springframework.cglib.core.Converter;
/**
* BeanCopier属性缓存
* 缓存用于防止多次反射造成的性能问题
*
* @author Looly
* @since 5.4.1
*/
public enum BeanCopierCache {
/**
* BeanCopier属性缓存单例
*/
INSTANCE;
private final WeakConcurrentMap cache = new WeakConcurrentMap<>();
/**
* 获得类与转换器生成的key在{@link BeanCopier}的Map中对应的元素
*
* @param srcClass 源Bean的类
* @param targetClass 目标Bean的类
* @param converter 转换器
* @return Map中对应的BeanCopier
*/
public BeanCopier get(final Class srcClass, final Class targetClass, final Converter converter) {
return get(srcClass, targetClass, null != converter);
}
/**
* 获得类与转换器生成的key在{@link BeanCopier}的Map中对应的元素
*
* @param srcClass 源Bean的类
* @param targetClass 目标Bean的类
* @param useConverter 是否使用转换器
* @return Map中对应的BeanCopier
* @since 5.8.0
*/
public BeanCopier get(final Class srcClass, final Class targetClass, final boolean useConverter) {
final String key = genKey(srcClass, targetClass, useConverter);
return cache.computeIfAbsent(key, (k) -> BeanCopier.create(srcClass, targetClass, useConverter));
}
/**
* 获得类与转换器生成的key
* 结构类似于：srcClassName#targetClassName#1 或者 srcClassName#targetClassName#0
*
* @param srcClass 源Bean的类
* @param targetClass 目标Bean的类
* @param useConverter 是否使用转换器
* @return 属性名和Map映射的key
*/
private String genKey(final Class srcClass, final Class targetClass, final boolean useConverter) {
final StringBuilder key = StrUtil.builder()
.append(srcClass.getName())
.append('#').append(targetClass.getName())
.append('#').append(useConverter ? 1 : 0);
return key.toString();
}
}