001/*
002 * Copyright 2002-2011 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.annotation;
018
019import java.lang.annotation.Documented;
020import java.lang.annotation.ElementType;
021import java.lang.annotation.Inherited;
022import java.lang.annotation.Retention;
023import java.lang.annotation.RetentionPolicy;
024import java.lang.annotation.Target;
025
026/**
027 * This annotation may be used on a field or parameter as a qualifier for
028 * candidate beans when autowiring. It may also be used to annotate other
029 * custom annotations that can then in turn be used as qualifiers.
030 *
031 * @author Mark Fisher
032 * @author Juergen Hoeller
033 * @since 2.5
034 * @see Autowired
035 */
036@Target({ElementType.FIELD, ElementType.METHOD, ElementType.PARAMETER, ElementType.TYPE, ElementType.ANNOTATION_TYPE})
037@Retention(RetentionPolicy.RUNTIME)
038@Inherited
039@Documented
040public @interface Qualifier {
041
042        String value() default "";
043
044}