001/*
002 * Copyright 2002-2017 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.aspectj;
018
019import org.springframework.core.Ordered;
020import org.springframework.lang.Nullable;
021
022/**
023 * Interface implemented to provide an instance of an AspectJ aspect.
024 * Decouples from Spring's bean factory.
025 *
026 * <p>Extends the {@link org.springframework.core.Ordered} interface
027 * to express an order value for the underlying aspect in a chain.
028 *
029 * @author Rod Johnson
030 * @author Juergen Hoeller
031 * @since 2.0
032 * @see org.springframework.beans.factory.BeanFactory#getBean
033 */
034public interface AspectInstanceFactory extends Ordered {
035
036        /**
037         * Create an instance of this factory's aspect.
038         * @return the aspect instance (never {@code null})
039         */
040        Object getAspectInstance();
041
042        /**
043         * Expose the aspect class loader that this factory uses.
044         * @return the aspect class loader (or {@code null} for the bootstrap loader)
045         * @see org.springframework.util.ClassUtils#getDefaultClassLoader()
046         */
047        @Nullable
048        ClassLoader getAspectClassLoader();
049
050}