spring ConstructorBinding 源码
springboot ConstructorBinding 代码
文件路径：/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/context/properties/ConstructorBinding.java
/*
* Copyright 2012-2022 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.boot.context.properties;
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;
/**
* Annotation that can be used to indicate which constructor to use when binding
* configuration properties using constructor arguments rather than by calling setters. A
* single parameterized constructor implicitly indicates that constructor binding should
* be used unless the constructor is annotated with `@Autowired`.
* <p>
* Note: To use constructor binding the class must be enabled using
* {@link EnableConfigurationProperties @EnableConfigurationProperties} or configuration
* property scanning. Constructor binding cannot be used with beans that are created by
* the regular Spring mechanisms (e.g.
* {@link org.springframework.stereotype.Component @Component} beans, beans created via
* {@link org.springframework.context.annotation.Bean @Bean} methods or beans loaded using
* {@link org.springframework.context.annotation.Import @Import}).
*
* @author Phillip Webb
* @since 2.2.0
* @see ConfigurationProperties
*/
@Target(ElementType.CONSTRUCTOR)
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface ConstructorBinding {
}
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