spring NestedConfigurationProperty 源码
springboot NestedConfigurationProperty 代码
文件路径：/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/context/properties/NestedConfigurationProperty.java
/*
* Copyright 2012-2019 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;
/**
* Indicates that a field in a {@link ConfigurationProperties @ConfigurationProperties}
* object should be treated as if it were a nested type. This annotation has no bearing on
* the actual binding processes, but it is used by the
* {@code spring-boot-configuration-processor} as a hint that a field is not bound as a
* single value. When this is specified, a nested group is created for the field and its
* type is harvested.
* <p>
* This has no effect on collections and maps as these types are automatically identified.
*
* @author Stephane Nicoll
* @author Phillip Webb
* @since 1.2.0
*/
@Target(ElementType.FIELD)
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface NestedConfigurationProperty {
}
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