Java tutorial
/** * The Clican-Pluto software suit is Copyright 2009, Clican Company and individual contributors, and is licensed under the GNU LGPL. * * @author jerry.tian * */ package com.clican.pluto.fsm.spring.parser; import java.util.List; import java.util.Map; import org.apache.commons.lang.StringUtils; import org.springframework.beans.factory.annotation.Autowire; import org.springframework.beans.factory.config.BeanDefinition; import org.springframework.beans.factory.config.RuntimeBeanReference; import org.springframework.beans.factory.support.BeanDefinitionRegistry; import org.springframework.beans.factory.support.ManagedList; import org.springframework.beans.factory.support.ManagedMap; import org.springframework.beans.factory.support.RootBeanDefinition; import org.springframework.beans.factory.xml.BeanDefinitionParser; import org.springframework.beans.factory.xml.ParserContext; import org.w3c.dom.Element; import org.w3c.dom.Node; import org.w3c.dom.NodeList; import com.clican.pluto.fsm.engine.IState; /** * The abstract base state parser. * * @author clican * */ public abstract class AbstractStateParser implements BeanDefinitionParser { @SuppressWarnings({ "rawtypes", "unchecked" }) public BeanDefinition parse(Element element, ParserContext parserContext) { BeanDefinitionRegistry bdr = parserContext.getRegistry(); RootBeanDefinition beanDef = new RootBeanDefinition(); beanDef.setDestroyMethodName("destroy"); beanDef.setAbstract(false); beanDef.setBeanClass(getStateClass(element)); beanDef.setLazyInit(false); beanDef.setAutowireMode(Autowire.BY_NAME.value()); String name = element.getAttribute("name"); if (bdr.containsBeanDefinition(name)) { throw new RuntimeException("name[" + name + "]is defined duplicated"); } bdr.registerBeanDefinition(name, beanDef); beanDef.getPropertyValues().addPropertyValue("name", name); String value = element.getAttribute("value"); beanDef.getPropertyValues().addPropertyValue("value", value); String propagation = element.getAttribute("propagation"); beanDef.getPropertyValues().addPropertyValue("propagation", propagation); String nextStates = element.getAttribute("nextStates"); if (StringUtils.isNotEmpty(nextStates)) { List nextStateList = new ManagedList(); for (String nextState : nextStates.split(",")) { nextStateList.add(new RuntimeBeanReference(nextState.trim())); } beanDef.getPropertyValues().addPropertyValue("nextStates", nextStateList); } String previousStates = element.getAttribute("previousStates"); if (StringUtils.isNotEmpty(previousStates)) { List previousStateList = new ManagedList(); for (String previousState : previousStates.split(",")) { previousStateList.add(new RuntimeBeanReference(previousState.trim())); } beanDef.getPropertyValues().addPropertyValue("previousStates", previousStateList); } NodeList nodeList = element.getChildNodes(); Map nextCondStates = new ManagedMap(); Map params = new ManagedMap(); List stateListeners = new ManagedList(); List taskListeners = new ManagedList(); Map timeoutListeners = new ManagedMap(); for (int i = 0; i < nodeList.getLength(); i++) { Node node = nodeList.item(i); if (node.getNodeType() == Node.ELEMENT_NODE) { String localName = node.getLocalName(); Element e = (Element) node; if ("nextCondStates".equals(localName)) { String expr = e.getAttribute("expr"); nextStates = e.getAttribute("nextStates"); List nextStateList = new ManagedList(); if (StringUtils.isNotEmpty(nextStates)) { for (String nextState : nextStates.split(",")) { nextStateList.add(new RuntimeBeanReference(nextState.trim())); } } nextCondStates.put(expr, nextStateList); } else if ("param".equals(localName)) { String paramName = e.getAttribute("name"); String paramValue = e.getAttribute("value"); params.put(paramName, paramValue); } else if ("stateListener".equals(localName) || "timeoutListener".equals(localName) || "taskListener".equals(localName)) { String clazz = e.getAttribute("clazz"); String listener = e.getAttribute("listener"); Object obj; if (StringUtils.isNotEmpty(clazz)) { try { RootBeanDefinition bean = new RootBeanDefinition(); bean.setAbstract(false); bean.setBeanClass(Class.forName(clazz)); bean.setLazyInit(false); bean.setAutowireMode(Autowire.BY_NAME.value()); if ("timeoutListener".equals(localName)) { String timeoutName = e.getAttribute("name"); String startTime = e.getAttribute("startTime"); String dueTime = e.getAttribute("dueTime"); String repeatTime = e.getAttribute("repeatTime"); String repeatDuration = e.getAttribute("repeatDuration"); String businessCalendarName = e.getAttribute("businessCalendarName"); bean.getPropertyValues().addPropertyValue("name", timeoutName); bean.getPropertyValues().addPropertyValue("startTime", startTime); bean.getPropertyValues().addPropertyValue("dueTime", dueTime); bean.getPropertyValues().addPropertyValue("repeatTime", repeatTime); bean.getPropertyValues().addPropertyValue("repeatDuration", repeatDuration); bean.getPropertyValues().addPropertyValue("businessCalendarName", businessCalendarName); } NodeList nodeList2 = element.getChildNodes(); Map params2 = new ManagedMap(); for (int j = 0; j < nodeList2.getLength(); j++) { Node node2 = nodeList2.item(j); if (node2.getNodeType() == Node.ELEMENT_NODE) { String localName2 = node2.getLocalName(); if ("param".equals(localName2)) { String paramName = ((Element) node2).getAttribute("name"); String paramValue = ((Element) node2).getAttribute("value"); params2.put(paramName, paramValue); } } } obj = bean; } catch (Exception ex) { throw new RuntimeException(ex); } } else if (StringUtils.isNotEmpty(listener)) { obj = new RuntimeBeanReference(listener.trim()); } else { throw new RuntimeException("There must be clazz or listener parameter setting"); } if ("stateListener".equals(localName)) { stateListeners.add(obj); } else if ("taskListeners".equals(localName)) { taskListeners.add(obj); } else { String timeoutName = e.getAttribute("name"); timeoutListeners.put(timeoutName, obj); } } } } beanDef.getPropertyValues().addPropertyValue("nextCondStates", nextCondStates); beanDef.getPropertyValues().addPropertyValue("params", params); beanDef.getPropertyValues().addPropertyValue("stateListeners", stateListeners); if (element.getNodeName().equals("task")) { beanDef.getPropertyValues().addPropertyValue("taskListeners", taskListeners); } beanDef.getPropertyValues().addPropertyValue("timeoutListeners", timeoutListeners); customiseBeanDefinition(beanDef, element, parserContext); return beanDef; } public void setBeanDefinitionStringProperty(String propertyName, BeanDefinition beanDef, Element element) { String value = element.getAttribute(propertyName); beanDef.getPropertyValues().addPropertyValue(propertyName, value); } public abstract Class<? extends IState> getStateClass(Element element); public abstract void customiseBeanDefinition(BeanDefinition beanDef, Element element, ParserContext parserContext); } // $Id: AbstractStateParser.java 15178 2010-06-23 04:44:41Z wei.zhang $