/*
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* JBoss, Home of Professional Open Source
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* Copyright 2005, JBoss Inc., and individual contributors as indicated
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* by the @authors tag. See the copyright.txt in the distribution for a
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* full listing of individual contributors.
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*
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* This is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as
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* published by the Free Software Foundation; either version 2.1 of
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* the License, or (at your option) any later version.
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*
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* This software is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this software; if not, write to the Free
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* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
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*/
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package org.jbpm.jpdl.internal.repository;
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import java.io.ByteArrayInputStream;
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import java.io.StringWriter;
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import java.util.HashMap;
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import java.util.Map;
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import java.util.Set;
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import javax.xml.transform.OutputKeys;
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import javax.xml.transform.Transformer;
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import javax.xml.transform.TransformerFactory;
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import javax.xml.transform.dom.DOMSource;
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import javax.xml.transform.stream.StreamResult;
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import org.jbpm.api.JbpmException;
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import org.jbpm.internal.log.Log;
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import org.jbpm.jpdl.internal.xml.JpdlParser;
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import org.jbpm.pvm.internal.repository.DeploymentImpl;
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import org.jbpm.pvm.internal.repository.ProcessDeployer;
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import org.jbpm.pvm.internal.util.XmlUtil;
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import org.jbpm.pvm.internal.xml.Parser;
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import org.w3c.dom.Document;
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import org.w3c.dom.Element;
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import org.w3c.dom.Node;
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/**
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* @author Tom Baeyens
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*/
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public class JpdlDeployer extends ProcessDeployer {
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private static Log log = Log.getLog(JpdlDeployer.class.getName());
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private static Parser parser = new Parser();
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static JpdlParser jpdlParser = new JpdlParser();
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static final String jpdlExtension = ".jpdl.xml";
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public JpdlDeployer() {
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super(jpdlExtension, jpdlParser);
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}
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public void updateResource(DeploymentImpl deployment, String resourceName, byte[] bytes) {
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if (resourceName.endsWith(".jpdl.xml")) {
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Document document = parser
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.createParse()
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.setInputStream(new ByteArrayInputStream(bytes))
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.execute()
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.getDocument();
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Element documentElement = document.getDocumentElement();
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String tagName = XmlUtil.getTagLocalName(documentElement);
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if ("process-update".equals(tagName)) {
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updateJpdlProcessResource(deployment, resourceName, document);
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return;
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}
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}
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super.updateResource(deployment, resourceName, bytes);
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}
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public void updateJpdlProcessResource(DeploymentImpl deployment, String resourceName, Document updateDocument) {
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byte[] processBytes = deployment.getBytes(resourceName);
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Document processDocument = parser
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.createParse()
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.setInputStream(new ByteArrayInputStream(processBytes))
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.execute()
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.checkErrors("jPDL process update document")
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.getDocument();
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Element processElement = processDocument.getDocumentElement();
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Element processUpdateElement = updateDocument.getDocumentElement();
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Element processUpdateDescriptionElement = XmlUtil.element(processUpdateElement, "description");
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if (processUpdateDescriptionElement!=null) {
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Element processDescriptionElement = XmlUtil.element(processElement, "description");
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if (processDescriptionElement!=null) {
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processElement.removeChild(processDescriptionElement);
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}
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Node clonedDescriptionElement = processUpdateDescriptionElement.cloneNode(true);
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processDocument.adoptNode(clonedDescriptionElement);
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processElement.appendChild(clonedDescriptionElement);
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}
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updateActivities(processDocument, processElement, processUpdateElement);
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try {
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Transformer transformer = TransformerFactory.newInstance().newTransformer();
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transformer.setOutputProperty(OutputKeys.INDENT, "yes");
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//initialize StreamResult with File object to save to file
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StreamResult result = new StreamResult(new StringWriter());
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DOMSource source = new DOMSource(processDocument);
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transformer.transform(source, result);
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String updatedProcessXml = result.getWriter().toString();
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log.debug("updated process xml: \n"+updatedProcessXml);
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byte[] bytes = updatedProcessXml.getBytes();
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deployment.addResourceFromInputStream(resourceName, new ByteArrayInputStream(bytes));
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} catch (Exception e) {
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throw new JbpmException("couldn't serialize updated process dom model", e);
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}
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}
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private void updateActivities(Document processDocument, Element activityContainerElement, Element updateContainerElement) {
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Set<String> activityNames = jpdlParser.getActivityTagNames();
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Map<String, Element> processActivityMap = getActivityMap(activityContainerElement, activityNames);
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Map<String, Element> updateActivityMap = getActivityMap(updateContainerElement, activityNames);
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for (String activityName: updateActivityMap.keySet()) {
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Element updateActivity = updateActivityMap.get(activityName);
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Element processActivity = processActivityMap.get(activityName);
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if (processActivity==null) {
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throw new JbpmException("unmatching update activity "+activityName);
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}
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Node clonedUpdateActivity = updateActivity.cloneNode(true);
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processDocument.adoptNode(clonedUpdateActivity);
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activityContainerElement.insertBefore(clonedUpdateActivity, processActivity);
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activityContainerElement.removeChild(processActivity);
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// String updateTagName = XmlUtil.getTagLocalName(updateActivity);
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//
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// activityContainerElement.removeChild(processActivity);
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// Element mergedActivityElement = processDocument.createElement(updateTagName);
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//
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// mergeAttributes(mergedActivityElement, processActivity.getAttributes());
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// mergeAttributes(mergedActivityElement, updateActivity.getAttributes());
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//
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// Map<String, List<Element>> processActivityContents = getElementsByTagName(processActivity);
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// Map<String, List<Element>> updateActivityContents = getElementsByTagName(updateActivity);
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//
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// Set<String> allTagNames = new HashSet<String>(processActivityContents.keySet());
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// allTagNames.addAll(updateActivityContents.keySet());
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//
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// for (String tagName: allTagNames) {
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// List<Element> contentElements = processActivityContents.get(tagName);
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// if (contentElements==null) {
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// contentElements = new ArrayList<Element>();
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// }
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// List<Element> updateElements = updateActivityContents.get(tagName);
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// for (int i=0; i<contentElements.size(); i++) {
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// Element contentElement = contentElements.get(i);
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// Element updateElement = (updateElements!=null && updateElements.size()>i ? updateElements.get(i) : null);
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// if (updateElement!=null) {
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// mergeAttributes(contentElement, updateElement.getAttributes());
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// }
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// }
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// }
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}
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}
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protected Map<String, Element> getActivityMap(Element containerElement, Set<String> activityNames) {
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Map<String, Element> activityMap = new HashMap<String, Element>();
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for (Element element: XmlUtil.elements(containerElement)) {
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String tagName = XmlUtil.getTagLocalName(element);
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if (activityNames.contains(tagName)) {
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String activityName = element.getAttribute("name");
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activityMap.put(activityName, element);
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}
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}
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return activityMap;
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}
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}
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