001/* 002 * Copyright 2006-2008 the original author or authors. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * https://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016package org.springframework.batch.core.configuration.xml; 017 018import java.util.Collection; 019 020import org.springframework.beans.factory.config.BeanDefinition; 021import org.springframework.beans.factory.config.RuntimeBeanReference; 022import org.springframework.beans.factory.support.BeanDefinitionBuilder; 023import org.springframework.beans.factory.xml.ParserContext; 024import org.w3c.dom.Element; 025 026/** 027 * Internal parser for the <decision/> elements inside a job. A decision 028 * element references a bean definition for a 029 * {@link org.springframework.batch.core.job.flow.JobExecutionDecider} 030 * and goes on to list a set of transitions to other states with <next 031 * on="pattern" to="stepName"/>. Used by the {@link JobParser}. 032 * 033 * @see JobParser 034 * 035 * @author Dave Syer 036 * 037 */ 038public class DecisionParser { 039 040 /** 041 * Parse the decision and turn it into a list of transitions. 042 * 043 * @param element the <decision/gt; element to parse 044 * @param parserContext the parser context for the bean factory 045 * @return a collection of bean definitions for 046 * {@link org.springframework.batch.core.job.flow.support.StateTransition} 047 * instances objects 048 */ 049 public Collection<BeanDefinition> parse(Element element, ParserContext parserContext) { 050 051 String refAttribute = element.getAttribute("decider"); 052 String idAttribute = element.getAttribute("id"); 053 054 BeanDefinitionBuilder stateBuilder = 055 BeanDefinitionBuilder.genericBeanDefinition("org.springframework.batch.core.job.flow.support.state.DecisionState"); 056 stateBuilder.addConstructorArgValue(new RuntimeBeanReference(refAttribute)); 057 stateBuilder.addConstructorArgValue(idAttribute); 058 return InlineFlowParser.getNextElements(parserContext, stateBuilder.getBeanDefinition(), element); 059 060 } 061}