spring ImportRuntimeHints 源码
spring ImportRuntimeHints 代码
文件路径：/spring-context/src/main/java/org/springframework/context/annotation/ImportRuntimeHints.java
/*
* Copyright 2002-2022 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.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;
import org.springframework.aot.hint.RuntimeHintsRegistrar;
/**
* Indicates that one or more {@link RuntimeHintsRegistrar} implementations
* should be processed.
*
* <p>Unlike declaring {@link RuntimeHintsRegistrar} using
* {@code spring/aot.factories}, this annotation allows for more flexible
* registration where it is only processed if the annotated component or bean
* method is actually registered in the bean factory. To illustrate this
* behavior, consider the following example:
*
* <pre class="code">
* @Configuration
* public class MyConfiguration {
*
* @Bean
* @ImportRuntimeHints(MyHints.class)
* @Conditional(MyCondition.class)
* public MyService myService() {
* return new MyService();
* }
*
* }</pre>
*
* If the configuration class above is processed, {@code MyHints} will be
* contributed only if {@code MyCondition} matches. If it does not, and
* therefore {@code MyService} is not defined as a bean, the hints will
* not be processed either.
*
* <p>If several components refer to the same {@link RuntimeHintsRegistrar}
* implementation, it is invoked only once for a given bean factory
* processing.
*
* @author Brian Clozel
* @author Stephane Nicoll
* @since 6.0
* @see org.springframework.aot.hint.RuntimeHints
*/
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface ImportRuntimeHints {
/**
* {@link RuntimeHintsRegistrar} implementations to process.
*/
Class<? extends RuntimeHintsRegistrar>[] value();
}
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