spring ConfigurationCondition 源码
spring ConfigurationCondition 代码
文件路径：/spring-context/src/main/java/org/springframework/context/annotation/ConfigurationCondition.java
/*
* Copyright 2002-2020 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;
/**
* A {@link Condition} that offers more fine-grained control when used with
* {@code @Configuration}. Allows certain conditions to adapt when they match
* based on the configuration phase. For example, a condition that checks if a bean
* has already been registered might choose to only be evaluated during the
* {@link ConfigurationPhase#REGISTER_BEAN REGISTER_BEAN} {@link ConfigurationPhase}.
*
* @author Phillip Webb
* @since 4.0
* @see Configuration
*/
public interface ConfigurationCondition extends Condition {
/**
* Return the {@link ConfigurationPhase} in which the condition should be evaluated.
*/
ConfigurationPhase getConfigurationPhase();
/**
* The various configuration phases where the condition could be evaluated.
*/
enum ConfigurationPhase {
/**
* The {@link Condition} should be evaluated as a {@code @Configuration}
* class is being parsed.
* <p>If the condition does not match at this point, the {@code @Configuration}
* class will not be added.
*/
PARSE_CONFIGURATION,
/**
* The {@link Condition} should be evaluated when adding a regular
* (non {@code @Configuration}) bean. The condition will not prevent
* {@code @Configuration} classes from being added.
* <p>At the time that the condition is evaluated, all {@code @Configuration}
* classes will have been parsed.
*/
REGISTER_BEAN
}
}
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