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Expound on inheritance semantics for @Conditional 

Issue: SPR-11598
This commit is contained in:
Sam Brannen 2015-05-13 14:25:04 +02:00
parent dc39e3565c
commit 03ade48d68
1 changed files with 14 additions and 7 deletions
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21
spring-context/src/main/java/org/springframework/context/annotation/Conditional.java
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@ -1,5 +1,5 @@
/*
* Copyright 2002-2014 the original author or authors.
* Copyright 2002-2015 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.
@ -23,7 +23,7 @@ import java.lang.annotation.Target;
/**
* Indicates that a component is only eligible for registration when all
* {@linkplain #value() specified conditions} match.
* {@linkplain #value specified conditions} match.
*
* <p>A <em>condition</em> is any state that can be determined programmatically
* before the bean definition is due to be registered (see {@link Condition} for details).
@ -37,14 +37,21 @@ import java.lang.annotation.Target;
* <li>as a method-level annotation on any {@link Bean @Bean} method</li>
* </ul>
*
* <p>If a {@code @Configuration} class is marked with {@code @Conditional}, all of the
* {@code @Bean} methods, {@link Import @Import} and {@link ComponentScan @ComponentScan}
* annotations associated with that class will be subject to the conditions.
* <p>If a {@code @Configuration} class is marked with {@code @Conditional},
* all of the {@code @Bean} methods, {@link Import @Import} annotations, and
* {@link ComponentScan @ComponentScan} annotations associated with that
* class will be subject to the conditions.
*
* <p>NOTE: {@code @Conditional} annotations are not inherited; any conditions from
* superclasses or from overridden methods are not being considered.
* <p><strong>NOTE</strong>: Inheritance of {@code @Conditional} annotations
* is not supported; any conditions from superclasses or from overridden
* methods will not be considered. In order to enforce these semantics,
* {@code @Conditional} itself is not declared as
* {@link java.lang.annotation.Inherited @Inherited}; furthermore, any
* custom <em>composed annotation</em> that is meta-annotated with
* {@code @Conditional} must not be declared as {@code @Inherited}.
*
* @author Phillip Webb
* @author Sam Brannen
* @since 4.0
* @see Condition
*/