/*
* Copyright 2018-2020 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.data.util;
import lombok.experimental.UtilityClass;
import java.util.List;
import java.util.Map;
import org.springframework.aop.support.AopUtils;
import org.springframework.core.io.support.SpringFactoriesLoader;
import org.springframework.util.Assert;
import org.springframework.util.ClassUtils;
import org.springframework.util.ConcurrentReferenceHashMap;
Proxy type detection utilities, extensible via ProxyDetector
registered via Spring factories. Author: Oliver Gierke @soundtrack Victor Wooten - Cruising Altitude (Trypnotix)
/**
* Proxy type detection utilities, extensible via {@link ProxyDetector} registered via Spring factories.
*
* @author Oliver Gierke
* @soundtrack Victor Wooten - Cruising Altitude (Trypnotix)
*/
@UtilityClass
public class ProxyUtils {
private static Map<Class<?>, Class<?>> USER_TYPES = new ConcurrentReferenceHashMap<>();
private static final List<ProxyDetector> DETECTORS = SpringFactoriesLoader.loadFactories(ProxyDetector.class,
ProxyUtils.class.getClassLoader());
static {
DETECTORS.add(ClassUtils::getUserClass);
}
Returns the user class for the given type.
Params: - type – must not be null.
Returns:
/**
* Returns the user class for the given type.
*
* @param type must not be {@literal null}.
* @return
*/
public static Class<?> getUserClass(Class<?> type) {
Assert.notNull(type, "Type must not be null!");
return USER_TYPES.computeIfAbsent(type, it -> {
Class<?> result = it;
for (ProxyDetector proxyDetector : DETECTORS) {
result = proxyDetector.getUserType(result);
}
return result;
});
}
Returns the user class for the given source object.
Params: - source – must not be null.
Returns:
/**
* Returns the user class for the given source object.
*
* @param source must not be {@literal null}.
* @return
*/
public static Class<?> getUserClass(Object source) {
Assert.notNull(source, "Source object must not be null!");
return getUserClass(AopUtils.getTargetClass(source));
}
SPI to extend Spring's default proxy detection capabilities.
Author: Oliver Gierke
/**
* SPI to extend Spring's default proxy detection capabilities.
*
* @author Oliver Gierke
*/
public interface ProxyDetector {
Returns the user class for the given type.
Params: - type – will never be null.
Returns:
/**
* Returns the user class for the given type.
*
* @param type will never be {@literal null}.
* @return
*/
Class<?> getUserType(Class<?> type);
}
}