001/* 002 * Copyright 2002-2019 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.context.annotation; 018 019import java.lang.annotation.Documented; 020import java.lang.annotation.ElementType; 021import java.lang.annotation.Retention; 022import java.lang.annotation.RetentionPolicy; 023import java.lang.annotation.Target; 024 025/** 026 * Indicates one or more <em>component classes</em> to import — typically 027 * {@link Configuration @Configuration} classes. 028 * 029 * <p>Provides functionality equivalent to the {@code <import/>} element in Spring XML. 030 * Allows for importing {@code @Configuration} classes, {@link ImportSelector} and 031 * {@link ImportBeanDefinitionRegistrar} implementations, as well as regular component 032 * classes (as of 4.2; analogous to {@link AnnotationConfigApplicationContext#register}). 033 * 034 * <p>{@code @Bean} definitions declared in imported {@code @Configuration} classes should be 035 * accessed by using {@link org.springframework.beans.factory.annotation.Autowired @Autowired} 036 * injection. Either the bean itself can be autowired, or the configuration class instance 037 * declaring the bean can be autowired. The latter approach allows for explicit, IDE-friendly 038 * navigation between {@code @Configuration} class methods. 039 * 040 * <p>May be declared at the class level or as a meta-annotation. 041 * 042 * <p>If XML or other non-{@code @Configuration} bean definition resources need to be 043 * imported, use the {@link ImportResource @ImportResource} annotation instead. 044 * 045 * @author Chris Beams 046 * @author Juergen Hoeller 047 * @since 3.0 048 * @see Configuration 049 * @see ImportSelector 050 * @see ImportBeanDefinitionRegistrar 051 * @see ImportResource 052 */ 053@Target(ElementType.TYPE) 054@Retention(RetentionPolicy.RUNTIME) 055@Documented 056public @interface Import { 057 058 /** 059 * {@link Configuration @Configuration}, {@link ImportSelector}, 060 * {@link ImportBeanDefinitionRegistrar}, or regular component classes to import. 061 */ 062 Class<?>[] value(); 063 064}