spring-data-jpa HibernateProxyDetector 源码
spring-data-jpa HibernateProxyDetector 代码
文件路径：/spring-data-jpa/src/main/java/org/springframework/data/jpa/util/HibernateProxyDetector.java
/*
* Copyright 2018-2022 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.data.jpa.util;
import java.util.Optional;
import org.hibernate.proxy.HibernateProxy;
import org.springframework.data.util.ProxyUtils.ProxyDetector;
import org.springframework.lang.Nullable;
import org.springframework.util.ClassUtils;
/**
* {@link ProxyDetector} to explicitly check for Hibernate's {@link HibernateProxy}.
*
* @author Oliver Gierke
*/
class HibernateProxyDetector implements ProxyDetector {
private static final Optional<Class<?>> HIBERNATE_PROXY = Optional.ofNullable(loadHibernateProxyType());
@Override
public Class<?> getUserType(Class<?> type) {
return HIBERNATE_PROXY //
.map(it -> it.isAssignableFrom(type) ? type.getSuperclass() : type) //
.filter(it -> !Object.class.equals(it)) //
.orElse(type);
}
@Nullable
private static Class<?> loadHibernateProxyType() {
try {
return ClassUtils.forName("org.hibernate.proxy.HibernateProxy", HibernateProxyDetector.class.getClassLoader());
} catch (ClassNotFoundException o_O) {
return null;
}
}
}
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