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/*
* Copyright 2002-2024 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.context.annotation;
import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
/**
* Indicates that a bean qualifies as a fallback autowire candidate.
* This is a companion and alternative to the {@link Primary} annotation.
*
* If all beans but one among multiple matching candidates are marked
* as a fallback, the remaining bean will be selected.
*
*
Just like primary beans, fallback beans only have an effect when
* finding multiple candidates for single injection points.
* All type-matching beans are included when autowiring arrays,
* collections, maps, or ObjectProvider streams.
*
* @author Juergen Hoeller
* @since 6.2
* @see Primary
* @see Lazy
* @see Bean
* @see org.springframework.beans.factory.config.BeanDefinition#setFallback
*/
@Target({ElementType.TYPE, ElementType.METHOD})
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface Fallback {
}
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