1 /*
2 * Copyright 2006-2009 the original author or authors.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 package org.springframework.batch.core.configuration.xml;
17
18 import java.util.Collection;
19
20 import org.springframework.batch.core.job.flow.support.state.StepState;
21 import org.springframework.beans.factory.config.BeanDefinition;
22 import org.springframework.beans.factory.parsing.BeanComponentDefinition;
23 import org.springframework.beans.factory.support.AbstractBeanDefinition;
24 import org.springframework.beans.factory.support.BeanDefinitionBuilder;
25 import org.springframework.beans.factory.xml.ParserContext;
26 import org.w3c.dom.Element;
27
28 /**
29 * Internal parser for the <step/> elements inside a job. A step element
30 * references a bean definition for a
31 * {@link org.springframework.batch.core.Step} and goes on to (optionally) list
32 * a set of transitions from that step to others with <next on="pattern"
33 * to="stepName"/>. Used by the {@link JobParser}.
34 *
35 * @see JobParser
36 *
37 * @author Dave Syer
38 * @author Thomas Risberg
39 * @since 2.0
40 */
41 public class InlineStepParser extends AbstractStepParser {
42
43 /**
44 * Parse the step and turn it into a list of transitions.
45 *
46 * @param element the <step/gt; element to parse
47 * @param parserContext the parser context for the bean factory
48 * @param jobFactoryRef the reference to the {@link JobParserJobFactoryBean}
49 * from the enclosing tag
50 * @return a collection of bean definitions for
51 * {@link org.springframework.batch.core.job.flow.support.StateTransition}
52 * instances objects
53 */
54 public Collection<BeanDefinition> parse(Element element, ParserContext parserContext, String jobFactoryRef) {
55
56 BeanDefinitionBuilder stateBuilder = BeanDefinitionBuilder.genericBeanDefinition(StepState.class);
57 String stepId = element.getAttribute(ID_ATTR);
58
59 AbstractBeanDefinition bd = parseStep(element, parserContext, jobFactoryRef);
60 parserContext.registerBeanComponent(new BeanComponentDefinition(bd, stepId));
61 stateBuilder.addConstructorArgReference(stepId);
62
63 return InlineFlowParser.getNextElements(parserContext, stepId, stateBuilder.getBeanDefinition(), element);
64
65 }
66
67 }