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Clarify Javadoc of ConditionalOn annotations

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Closes gh-14681
pull/14583/merge
Roland Weisleder 6 years ago committed by Stephane Nicoll
parent b4c5aea152
commit d2a063b26a
3 changed files with 30 additions and 31 deletions
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25
spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/condition/ConditionalOnBean.java
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@ -1,5 +1,5 @@
/*
* Copyright 2012-2017 the original author or authors.
* Copyright 2012-2018 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.
@ -24,13 +24,14 @@ import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.Conditional;
/**
* {@link Conditional} that only matches when the specified bean classes and/or names are
* already contained in the {@link BeanFactory}. When placed on a {@code @Bean} method,
* the bean class defaults to the return type of the factory method:
* {@link Conditional} that only matches when beans of the specified classes and/or with
* the specified names are already contained in the {@link BeanFactory}.
* <p>
* When placed on a {@code @Bean} method, the bean class defaults to the return type of
* the factory method:
*
* <pre class="code">
* &#064;Configuration
@ -61,15 +62,15 @@ import org.springframework.context.annotation.Conditional;
public @interface ConditionalOnBean {
/**
* The class type of bean that should be checked. The condition matches when all of
* the classes specified are contained in the {@link ApplicationContext}.
* The class types of beans that should be checked. The condition matches when beans
* of all classes specified are contained in the {@link BeanFactory}.
* @return the class types of beans to check
*/
Class<?>[] value() default {};
/**
* The class type names of bean that should be checked. The condition matches when all
* of the classes specified are contained in the {@link ApplicationContext}.
* The class type names of beans that should be checked. The condition matches when
* beans of all classes specified are contained in the {@link BeanFactory}.
* @return the class type names of beans to check
*/
String[] type() default {};
@ -77,15 +78,15 @@ public @interface ConditionalOnBean {
/**
* The annotation type decorating a bean that should be checked. The condition matches
* when all of the annotations specified are defined on beans in the
* {@link ApplicationContext}.
* {@link BeanFactory}.
* @return the class-level annotation types to check
*/
Class<? extends Annotation>[] annotation() default {};
/**
* The names of beans to check. The condition matches when all of the bean names
* specified are contained in the {@link ApplicationContext}.
* @return the name of beans to check
* specified are contained in the {@link BeanFactory}.
* @return the names of beans to check
*/
String[] name() default {};

23
spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/condition/ConditionalOnMissingBean.java
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@ -1,5 +1,5 @@
/*
* Copyright 2012-2017 the original author or authors.
* Copyright 2012-2018 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.
@ -24,12 +24,11 @@ import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.Conditional;
/**
* {@link Conditional} that only matches when the specified bean classes and/or names are
* not already contained in the {@link BeanFactory}.
* {@link Conditional} that only matches when no beans of the specified classes and/or
* with the specified names are already contained in the {@link BeanFactory}.
* <p>
* When placed on a {@code @Bean} method, the bean class defaults to the return type of
* the factory method:
@ -64,21 +63,21 @@ import org.springframework.context.annotation.Conditional;
public @interface ConditionalOnMissingBean {
/**
* The class type of bean that should be checked. The condition matches when each
* class specified is missing in the {@link ApplicationContext}.
* The class types of beans that should be checked. The condition matches when no bean
* of each class specified is contained in the {@link BeanFactory}.
* @return the class types of beans to check
*/
Class<?>[] value() default {};
/**
* The class type names of bean that should be checked. The condition matches when
* each class specified is missing in the {@link ApplicationContext}.
* The class type names of beans that should be checked. The condition matches when no
* bean of each class specified is contained in the {@link BeanFactory}.
* @return the class type names of beans to check
*/
String[] type() default {};
/**
* The class type of beans that should be ignored when identifying matching beans.
* The class types of beans that should be ignored when identifying matching beans.
* @return the class types of beans to ignore
* @since 1.2.5
*/
@ -95,15 +94,15 @@ public @interface ConditionalOnMissingBean {
/**
* The annotation type decorating a bean that should be checked. The condition matches
* when each annotation specified is missing from all beans in the
* {@link ApplicationContext}.
* {@link BeanFactory}.
* @return the class-level annotation types to check
*/
Class<? extends Annotation>[] annotation() default {};
/**
* The names of beans to check. The condition matches when each bean name specified is
* missing in the {@link ApplicationContext}.
* @return the name of beans to check
* missing in the {@link BeanFactory}.
* @return the names of beans to check
*/
String[] name() default {};

13
spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/condition/ConditionalOnSingleCandidate.java
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@ -1,5 +1,5 @@
/*
* Copyright 2012-2017 the original author or authors.
* Copyright 2012-2018 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.
@ -23,11 +23,10 @@ import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.Conditional;
/**
* {@link Conditional} that only matches when the specified bean class is already
* {@link Conditional} that only matches when a bean of the specified class is already
* contained in the {@link BeanFactory} and a single candidate can be determined.
* <p>
* The condition will also match if multiple matching bean instances are already contained
@ -49,8 +48,8 @@ import org.springframework.context.annotation.Conditional;
public @interface ConditionalOnSingleCandidate {
/**
* The class type of bean that should be checked. The condition match if the class
* specified is contained in the {@link ApplicationContext} and a primary candidate
* The class type of bean that should be checked. The condition matches if a bean of
* the class specified is contained in the {@link BeanFactory} and a primary candidate
* exists in case of multiple instances.
* <p>
* This attribute may <strong>not</strong> be used in conjunction with
@ -60,8 +59,8 @@ public @interface ConditionalOnSingleCandidate {
Class<?> value() default Object.class;
/**
* The class type name of bean that should be checked. The condition matches if the
* class specified is contained in the {@link ApplicationContext} and a primary
* The class type name of bean that should be checked. The condition matches if a bean
* of the class specified is contained in the {@link BeanFactory} and a primary
* candidate exists in case of multiple instances.
* <p>
* This attribute may <strong>not</strong> be used in conjunction with

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