spring SourceExtractor 源码
spring SourceExtractor 代码
文件路径：/spring-beans/src/main/java/org/springframework/beans/factory/parsing/SourceExtractor.java
/*
* Copyright 2002-2016 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.beans.factory.parsing;
import org.springframework.core.io.Resource;
import org.springframework.lang.Nullable;
/**
* Simple strategy allowing tools to control how source metadata is attached
* to the bean definition metadata.
*
* <p>Configuration parsers <strong>may</strong> provide the ability to attach
* source metadata during the parse phase. They will offer this metadata in a
* generic format which can be further modified by a {@link SourceExtractor}
* before being attached to the bean definition metadata.
*
* @author Rob Harrop
* @author Juergen Hoeller
* @since 2.0
* @see org.springframework.beans.BeanMetadataElement#getSource()
* @see org.springframework.beans.factory.config.BeanDefinition
*/
@FunctionalInterface
public interface SourceExtractor {
/**
* Extract the source metadata from the candidate object supplied
* by the configuration parser.
* @param sourceCandidate the original source metadata (never {@code null})
* @param definingResource the resource that defines the given source object
* (may be {@code null})
* @return the source metadata object to store (may be {@code null})
*/
@Nullable
Object extractSource(Object sourceCandidate, @Nullable Resource definingResource);
}
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