spring-batch DecisionParser 源码
spring-batch DecisionParser 代码
文件路径：/spring-batch-core/src/main/java/org/springframework/batch/core/configuration/xml/DecisionParser.java
/*
* Copyright 2006-2008 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.factory.config.BeanDefinition;
import org.springframework.beans.factory.config.RuntimeBeanReference;
import org.springframework.beans.factory.support.BeanDefinitionBuilder;
import org.springframework.beans.factory.xml.ParserContext;
import org.w3c.dom.Element;
/**
* Internal parser for the <decision/> elements inside a job. A decision element
* references a bean definition for a
* {@link org.springframework.batch.core.job.flow.JobExecutionDecider} and goes on to list
* a set of transitions to other states with <next on="pattern" to="stepName"/>.
* Used by the {@link JobParser}.
*
* @see JobParser
* @author Dave Syer
*
*/
public class DecisionParser {
/**
* Parse the decision and turn it into a list of transitions.
* @param element the <decision/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("decider");
String idAttribute = element.getAttribute("id");
BeanDefinitionBuilder stateBuilder = BeanDefinitionBuilder
.genericBeanDefinition("org.springframework.batch.core.job.flow.support.state.DecisionState");
stateBuilder.addConstructorArgValue(new RuntimeBeanReference(refAttribute));
stateBuilder.addConstructorArgValue(idAttribute);
return InlineFlowParser.getNextElements(parserContext, stateBuilder.getBeanDefinition(), element);
}
}
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