spring-data-elasticsearch ElasticsearchAuditingBeanDefinitionParser 源码

spring-data-elasticsearch ElasticsearchAuditingBeanDefinitionParser 代码

文件路径：/src/main/java/org/springframework/data/elasticsearch/config/ElasticsearchAuditingBeanDefinitionParser.java

/*
 * Copyright 2020-2022 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.data.elasticsearch.config;

import static org.springframework.data.config.ParsingUtils.*;

import org.springframework.beans.factory.support.AbstractBeanDefinition;
import org.springframework.beans.factory.support.BeanDefinitionBuilder;
import org.springframework.beans.factory.support.BeanDefinitionRegistry;
import org.springframework.beans.factory.support.RootBeanDefinition;
import org.springframework.beans.factory.xml.AbstractSingleBeanDefinitionParser;
import org.springframework.beans.factory.xml.BeanDefinitionParser;
import org.springframework.beans.factory.xml.ParserContext;
import org.springframework.data.auditing.config.IsNewAwareAuditingHandlerBeanDefinitionParser;
import org.springframework.data.elasticsearch.core.event.AuditingEntityCallback;
import org.springframework.data.elasticsearch.core.event.ReactiveAuditingEntityCallback;
import org.springframework.data.elasticsearch.core.mapping.SimpleElasticsearchMappingContext;
import org.springframework.data.repository.util.ReactiveWrappers;
import org.springframework.lang.Nullable;
import org.springframework.util.StringUtils;
import org.w3c.dom.Element;

/**
 * {@link BeanDefinitionParser} to register a {@link AuditingEntityCallback} to transparently set auditing information
 * on an entity.
 *
 * @author Peter-Josef Meisch
 */
public class ElasticsearchAuditingBeanDefinitionParser extends AbstractSingleBeanDefinitionParser {

	private static String MAPPING_CONTEXT_BEAN_NAME = "simpleElasticsearchMappingContext";

	/*
	 * (non-Javadoc)
	 * @see org.springframework.beans.factory.xml.AbstractSingleBeanDefinitionParser#getBeanClass(org.w3c.dom.Element)
	 */
	@Override
	protected Class<?> getBeanClass(Element element) {
		return AuditingEntityCallback.class;
	}

	/*
	 * (non-Javadoc)
	 * @see org.springframework.beans.factory.xml.AbstractBeanDefinitionParser#shouldGenerateId()
	 */
	@Override
	protected boolean shouldGenerateId() {
		return true;
	}

	/*
	 * (non-Javadoc)
	 * @see org.springframework.beans.factory.xml.AbstractSingleBeanDefinitionParser#doParse(org.w3c.dom.Element, org.springframework.beans.factory.xml.ParserContext, org.springframework.beans.factory.support.BeanDefinitionBuilder)
	 */
	@Override
	protected void doParse(Element element, ParserContext parserContext, BeanDefinitionBuilder builder) {

		String mappingContextRef = element.getAttribute("mapping-context-ref");

		if (!StringUtils.hasText(mappingContextRef)) {

			BeanDefinitionRegistry registry = parserContext.getRegistry();

			if (!registry.containsBeanDefinition(MAPPING_CONTEXT_BEAN_NAME)) {
				registry.registerBeanDefinition(MAPPING_CONTEXT_BEAN_NAME,
						new RootBeanDefinition(SimpleElasticsearchMappingContext.class));
			}

			mappingContextRef = MAPPING_CONTEXT_BEAN_NAME;
		}

		IsNewAwareAuditingHandlerBeanDefinitionParser parser = new IsNewAwareAuditingHandlerBeanDefinitionParser(
				mappingContextRef);
		parser.parse(element, parserContext);

		AbstractBeanDefinition isNewAwareAuditingHandler = getObjectFactoryBeanDefinition(parser.getResolvedBeanName(),
				parserContext.extractSource(element));
		builder.addConstructorArgValue(isNewAwareAuditingHandler);

		if (ReactiveWrappers.isAvailable(ReactiveWrappers.ReactiveLibrary.PROJECT_REACTOR)) {
			registerReactiveAuditingEntityCallback(parserContext.getRegistry(), isNewAwareAuditingHandler,
					parserContext.extractSource(element));
		}
	}

	private void registerReactiveAuditingEntityCallback(BeanDefinitionRegistry registry,
			AbstractBeanDefinition isNewAwareAuditingHandler, @Nullable Object source) {

		BeanDefinitionBuilder builder = BeanDefinitionBuilder.rootBeanDefinition(ReactiveAuditingEntityCallback.class);

		builder.addConstructorArgValue(isNewAwareAuditingHandler);
		builder.getRawBeanDefinition().setSource(source);

		registry.registerBeanDefinition(ReactiveAuditingEntityCallback.class.getName(), builder.getBeanDefinition());
	}
}

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