org.springframework.core.DecoratingProxy Maven / Gradle / Ivy
/*
* Copyright 2002-2019 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
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*/
package org.springframework.core;
/**
* Interface to be implemented by decorating proxies, in particular Spring AOP
* proxies but potentially also custom proxies with decorator semantics.
*
* Note that this interface should just be implemented if the decorated class
* is not within the hierarchy of the proxy class to begin with. In particular,
* a "target-class" proxy such as a Spring AOP CGLIB proxy should not implement
* it since any lookup on the target class can simply be performed on the proxy
* class there anyway.
*
*
Defined in the core module in order to allow
* {@link org.springframework.core.annotation.AnnotationAwareOrderComparator}
* (and potential other candidates without spring-aop dependencies) to use it
* for introspection purposes, in particular annotation lookups.
*
* @author Juergen Hoeller
* @since 4.3
*/
public interface DecoratingProxy {
/**
* Return the (ultimate) decorated class behind this proxy.
*
In case of an AOP proxy, this will be the ultimate target class,
* not just the immediate target (in case of multiple nested proxies).
* @return the decorated class (never {@code null})
*/
Class getDecoratedClass();
}