spring-batch FlowElementParser 源码
spring-batch FlowElementParser 代码
文件路径：/spring-batch-core/src/main/java/org/springframework/batch/core/configuration/xml/FlowElementParser.java
/*
* Copyright 2006-2022 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.batch.core.configuration.xml;
import java.util.Collection;
import org.springframework.beans.MutablePropertyValues;
import org.springframework.beans.factory.config.BeanDefinition;
import org.springframework.beans.factory.support.AbstractBeanDefinition;
import org.springframework.beans.factory.support.BeanDefinitionBuilder;
import org.springframework.beans.factory.support.GenericBeanDefinition;
import org.springframework.beans.factory.xml.ParserContext;
import org.w3c.dom.Element;
/**
* Internal parser for the <flow/> elements inside a job.
*
* @see JobParser
* @author Dave Syer
*
*/
public class FlowElementParser {
private static final String ID_ATTR = "id";
private static final String REF_ATTR = "parent";
/**
* Parse the flow and turn it into a list of transitions.
* @param element The <flow/gt; element to parse.
* @param parserContext The parser context for the bean factory.
* @return a collection of bean definitions for
* {@link org.springframework.batch.core.job.flow.support.StateTransition} instances
* objects.
*/
public Collection<BeanDefinition> parse(Element element, ParserContext parserContext) {
String refAttribute = element.getAttribute(REF_ATTR);
String idAttribute = element.getAttribute(ID_ATTR);
BeanDefinitionBuilder stateBuilder = BeanDefinitionBuilder
.genericBeanDefinition("org.springframework.batch.core.job.flow.support.state.FlowState");
AbstractBeanDefinition flowDefinition = new GenericBeanDefinition();
flowDefinition.setParentName(refAttribute);
MutablePropertyValues propertyValues = flowDefinition.getPropertyValues();
propertyValues.addPropertyValue("name", idAttribute);
stateBuilder.addConstructorArgValue(flowDefinition);
stateBuilder.addConstructorArgValue(idAttribute);
return InlineFlowParser.getNextElements(parserContext, stateBuilder.getBeanDefinition(), element);
}
}
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