001/* 002 * Copyright 2002-2020 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 org.springframework.beans.factory.config.BeanDefinition; 020import org.springframework.util.Assert; 021 022/** 023 * An extension of {@code AnnotationBeanNameGenerator} that uses the fully qualified 024 * class name as the default bean name if an explicit bean name is not supplied via 025 * a supported type-level annotation such as {@code @Component} (see 026 * {@link AnnotationBeanNameGenerator} for details on supported annotations). 027 * 028 * <p>Favor this bean naming strategy over {@code AnnotationBeanNameGenerator} if 029 * you run into naming conflicts due to multiple autodetected components having the 030 * same non-qualified class name (i.e., classes with identical names but residing in 031 * different packages). 032 * 033 * <p>Note that an instance of this class is used by default for configuration-level 034 * import purposes; whereas, the default for component scanning purposes is a plain 035 * {@code AnnotationBeanNameGenerator}. 036 * 037 * @author Juergen Hoeller 038 * @author Sam Brannen 039 * @since 5.2.3 040 * @see org.springframework.beans.factory.support.DefaultBeanNameGenerator 041 * @see AnnotationBeanNameGenerator 042 * @see ConfigurationClassPostProcessor#IMPORT_BEAN_NAME_GENERATOR 043 */ 044public class FullyQualifiedAnnotationBeanNameGenerator extends AnnotationBeanNameGenerator { 045 046 /** 047 * A convenient constant for a default {@code FullyQualifiedAnnotationBeanNameGenerator} 048 * instance, as used for configuration-level import purposes. 049 * @since 5.2.11 050 */ 051 public static final FullyQualifiedAnnotationBeanNameGenerator INSTANCE = 052 new FullyQualifiedAnnotationBeanNameGenerator(); 053 054 055 @Override 056 protected String buildDefaultBeanName(BeanDefinition definition) { 057 String beanClassName = definition.getBeanClassName(); 058 Assert.state(beanClassName != null, "No bean class name set"); 059 return beanClassName; 060 } 061 062}