/*
* Copyright 2002-2009 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
*
* http://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.Inherited;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
/**
* Indicates that a bean should be given preference when multiple candidates
* are qualified to autowire a single-valued dependency. If exactly one 'primary'
* bean exists among the candidates, it will be the autowired value.
*
* <p>May be used on any class directly or indirectly annotated with
* {@link org.springframework.stereotype.Component} or on methods annotated
* with {@link Bean}.
*
* <p>Using {@link Primary} at the class level has no effect unless component-scanning
* is being used. If a {@link Primary}-annotated class is declared via XML,
* {@link Primary} annotation metadata is ignored, and
* {@literal <bean primary="true|false"/>} is respected instead.
*
* @author Chris Beams
* @since 3.0
* @see Lazy
* @see Bean
* @see org.springframework.stereotype.Component
*/
@Target({ElementType.TYPE, ElementType.METHOD})
@Retention(RetentionPolicy.RUNTIME)
@Inherited
@Documented
public @interface Primary {
}
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