| 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.List; |
| 19 | |
| 20 | import org.springframework.batch.core.listener.AbstractListenerFactoryBean; |
| 21 | import org.springframework.batch.core.listener.ListenerMetaData; |
| 22 | import org.springframework.batch.core.listener.StepListenerFactoryBean; |
| 23 | import org.springframework.batch.core.listener.StepListenerMetaData; |
| 24 | import org.springframework.beans.MutablePropertyValues; |
| 25 | import org.springframework.beans.factory.config.BeanDefinition; |
| 26 | import org.springframework.beans.factory.parsing.CompositeComponentDefinition; |
| 27 | import org.springframework.beans.factory.support.ManagedList; |
| 28 | import org.springframework.beans.factory.xml.ParserContext; |
| 29 | import org.springframework.util.xml.DomUtils; |
| 30 | import org.w3c.dom.Element; |
| 31 | |
| 32 | /** |
| 33 | * Parser for a step listener element. Builds a {@link StepListenerFactoryBean} |
| 34 | * using attributes from the configuration. |
| 35 | * |
| 36 | * @author Dan Garrette |
| 37 | * @since 2.0 |
| 38 | * @see AbstractListenerParser |
| 39 | */ |
| 40 | public class StepListenerParser extends AbstractListenerParser { |
| 41 | |
| 42 | private static final String LISTENERS_ELE = "listeners"; |
| 43 | |
| 44 | private static final String MERGE_ATTR = "merge"; |
| 45 | |
| 46 | private final ListenerMetaData[] listenerMetaData; |
| 47 | |
| 48 | public StepListenerParser() { |
| 49 | this(StepListenerMetaData.values()); |
| 50 | } |
| 51 | |
| 52 | public StepListenerParser(ListenerMetaData[] listenerMetaData) { |
| 53 | this.listenerMetaData = listenerMetaData; |
| 54 | } |
| 55 | |
| 56 | protected Class<? extends AbstractListenerFactoryBean> getBeanClass() { |
| 57 | return StepListenerFactoryBean.class; |
| 58 | } |
| 59 | |
| 60 | protected ListenerMetaData[] getMetaDataValues() { |
| 61 | return listenerMetaData; |
| 62 | } |
| 63 | |
| 64 | @SuppressWarnings("unchecked") |
| 65 | public void handleListenersElement(Element stepElement, BeanDefinition beanDefinition, |
| 66 | ParserContext parserContext) { |
| 67 | MutablePropertyValues propertyValues = beanDefinition.getPropertyValues(); |
| 68 | List<Element> listenersElements = DomUtils.getChildElementsByTagName(stepElement, LISTENERS_ELE); |
| 69 | if (listenersElements.size() == 1) { |
| 70 | Element listenersElement = listenersElements.get(0); |
| 71 | CompositeComponentDefinition compositeDef = new CompositeComponentDefinition(listenersElement.getTagName(), |
| 72 | parserContext.extractSource(stepElement)); |
| 73 | parserContext.pushContainingComponent(compositeDef); |
| 74 | ManagedList listenerBeans = new ManagedList(); |
| 75 | if (propertyValues.contains("listeners")) { |
| 76 | listenerBeans = (ManagedList) propertyValues.getPropertyValue("listeners").getValue(); |
| 77 | } |
| 78 | listenerBeans.setMergeEnabled(listenersElement.hasAttribute(MERGE_ATTR) |
| 79 | && Boolean.valueOf(listenersElement.getAttribute(MERGE_ATTR))); |
| 80 | List<Element> listenerElements = DomUtils.getChildElementsByTagName(listenersElement, "listener"); |
| 81 | if (listenerElements != null) { |
| 82 | for (Element listenerElement : listenerElements) { |
| 83 | listenerBeans.add(parse(listenerElement, parserContext)); |
| 84 | } |
| 85 | } |
| 86 | propertyValues.addPropertyValue("listeners", listenerBeans); |
| 87 | parserContext.popAndRegisterContainingComponent(); |
| 88 | } |
| 89 | } |
| 90 | |
| 91 | } |