001/*
002 * Copyright 2002-2012 the original author or authors.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *      https://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package org.springframework.aop.framework;
018
019import org.springframework.lang.Nullable;
020
021/**
022 * Delegate interface for a configured AOP proxy, allowing for the creation
023 * of actual proxy objects.
024 *
025 * <p>Out-of-the-box implementations are available for JDK dynamic proxies
026 * and for CGLIB proxies, as applied by {@link DefaultAopProxyFactory}.
027 *
028 * @author Rod Johnson
029 * @author Juergen Hoeller
030 * @see DefaultAopProxyFactory
031 */
032public interface AopProxy {
033
034        /**
035         * Create a new proxy object.
036         * <p>Uses the AopProxy's default class loader (if necessary for proxy creation):
037         * usually, the thread context class loader.
038         * @return the new proxy object (never {@code null})
039         * @see Thread#getContextClassLoader()
040         */
041        Object getProxy();
042
043        /**
044         * Create a new proxy object.
045         * <p>Uses the given class loader (if necessary for proxy creation).
046         * {@code null} will simply be passed down and thus lead to the low-level
047         * proxy facility's default, which is usually different from the default chosen
048         * by the AopProxy implementation's {@link #getProxy()} method.
049         * @param classLoader the class loader to create the proxy with
050         * (or {@code null} for the low-level proxy facility's default)
051         * @return the new proxy object (never {@code null})
052         */
053        Object getProxy(@Nullable ClassLoader classLoader);
054
055}