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.beans.factory;
018
019/**
020 * Callback that allows a bean to be aware of the bean
021 * {@link ClassLoader class loader}; that is, the class loader used by the
022 * present bean factory to load bean classes.
023 *
024 * <p>This is mainly intended to be implemented by framework classes which
025 * have to pick up application classes by name despite themselves potentially
026 * being loaded from a shared class loader.
027 *
028 * <p>For a list of all bean lifecycle methods, see the
029 * {@link BeanFactory BeanFactory javadocs}.
030 *
031 * @author Juergen Hoeller
032 * @author Chris Beams
033 * @since 2.0
034 * @see BeanNameAware
035 * @see BeanFactoryAware
036 * @see InitializingBean
037 */
038public interface BeanClassLoaderAware extends Aware {
039
040        /**
041         * Callback that supplies the bean {@link ClassLoader class loader} to
042         * a bean instance.
043         * <p>Invoked <i>after</i> the population of normal bean properties but
044         * <i>before</i> an initialization callback such as
045         * {@link InitializingBean InitializingBean's}
046         * {@link InitializingBean#afterPropertiesSet()}
047         * method or a custom init-method.
048         * @param classLoader the owning class loader; may be {@code null} in
049         * which case a default {@code ClassLoader} must be used, for example
050         * the {@code ClassLoader} obtained via
051         * {@link org.springframework.util.ClassUtils#getDefaultClassLoader()}
052         */
053        void setBeanClassLoader(ClassLoader classLoader);
054
055}