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org.jbpm.bpmn2.xml.TaskHandler Maven / Gradle / Ivy
/**
* Copyright 2010 Red Hat, Inc. and/or its affiliates.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jbpm.bpmn2.xml;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import org.drools.core.process.core.Work;
import org.drools.core.process.core.impl.WorkImpl;
import org.drools.core.xml.ExtensibleXmlParser;
import org.jbpm.bpmn2.core.ItemDefinition;
import org.jbpm.compiler.xml.ProcessBuildData;
import org.jbpm.process.core.impl.DataTransformerRegistry;
import org.jbpm.workflow.core.Node;
import org.jbpm.workflow.core.NodeContainer;
import org.jbpm.workflow.core.impl.NodeImpl;
import org.jbpm.workflow.core.node.Assignment;
import org.jbpm.workflow.core.node.DataAssociation;
import org.jbpm.workflow.core.node.ForEachNode;
import org.jbpm.workflow.core.node.Transformation;
import org.jbpm.workflow.core.node.WorkItemNode;
import org.kie.api.runtime.process.DataTransformer;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;
import org.w3c.dom.Text;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
public class TaskHandler extends AbstractNodeHandler {
private DataTransformerRegistry transformerRegistry = DataTransformerRegistry.get();
private Map itemDefinitions;
Map dataTypeInputs = new HashMap();
Map dataTypeOutputs = new HashMap();
protected Node createNode(Attributes attrs) {
return new WorkItemNode();
}
public Class generateNodeFor() {
return Node.class;
}
protected void handleNode(final Node node, final Element element, final String uri,
final String localName, final ExtensibleXmlParser parser) throws SAXException {
super.handleNode(node, element, uri, localName, parser);
itemDefinitions = (Map)((ProcessBuildData) parser.getData()).getMetaData("ItemDefinitions");
WorkItemNode workItemNode = (WorkItemNode) node;
String name = getTaskName(element);
Work work = new WorkImpl();
work.setName(name);
workItemNode.setWork(work);
org.w3c.dom.Node xmlNode = element.getFirstChild();
while (xmlNode != null) {
String nodeName = xmlNode.getNodeName();
if ("ioSpecification".equals(nodeName)) {
readIoSpecification(xmlNode, dataInputs, dataOutputs);
} else if ("dataInputAssociation".equals(nodeName)) {
readDataInputAssociation(xmlNode, workItemNode, dataInputs);
} else if ("dataOutputAssociation".equals(nodeName)) {
readDataOutputAssociation(xmlNode, workItemNode, dataOutputs);
}
xmlNode = xmlNode.getNextSibling();
}
workItemNode.setMetaData("DataInputs", new HashMap(dataTypeInputs) );
workItemNode.setMetaData("DataOutputs", new HashMap(dataTypeOutputs) );
handleScript(workItemNode, element, "onEntry");
handleScript(workItemNode, element, "onExit");
String compensation = element.getAttribute("isForCompensation");
if( compensation != null ) {
boolean isForCompensation = Boolean.parseBoolean(compensation);
if( isForCompensation ) {
workItemNode.setMetaData("isForCompensation", isForCompensation );
}
}
}
protected String getTaskName(final Element element) {
return element.getAttribute("taskName");
}
protected void readIoSpecification(org.w3c.dom.Node xmlNode, Map dataInputs, Map dataOutputs) {
dataTypeInputs.clear();
dataTypeOutputs.clear();
org.w3c.dom.Node subNode = xmlNode.getFirstChild();
while (subNode instanceof Element) {
String subNodeName = subNode.getNodeName();
if ("dataInput".equals(subNodeName)) {
String id = ((Element) subNode).getAttribute("id");
String inputName = ((Element) subNode).getAttribute("name");
dataInputs.put(id, inputName);
String itemSubjectRef = ((Element) subNode).getAttribute("itemSubjectRef");
if (itemSubjectRef == null || itemSubjectRef.isEmpty()) {
String dataType = ((Element) subNode).getAttribute("dtype");
if (dataType == null || dataType.isEmpty()) {
dataType = "java.lang.String";
}
dataTypeInputs.put(inputName, dataType);
} else {
dataTypeInputs.put(inputName, itemDefinitions.get(itemSubjectRef).getStructureRef());
}
}
if ("dataOutput".equals(subNodeName)) {
String id = ((Element) subNode).getAttribute("id");
String outputName = ((Element) subNode).getAttribute("name");
dataOutputs.put(id, outputName);
String itemSubjectRef = ((Element) subNode).getAttribute("itemSubjectRef");
if (itemSubjectRef == null || itemSubjectRef.isEmpty()) {
String dataType = ((Element) subNode).getAttribute("dtype");
if (dataType == null || dataType.isEmpty()) {
dataType = "java.lang.String";
}
dataTypeOutputs.put(outputName, dataType);
} else {
dataTypeOutputs.put(outputName, itemDefinitions.get(itemSubjectRef).getStructureRef());
}
}
subNode = subNode.getNextSibling();
}
}
protected void readDataInputAssociation(org.w3c.dom.Node xmlNode, WorkItemNode workItemNode, Map dataInputs) {
// sourceRef
org.w3c.dom.Node subNode = xmlNode.getFirstChild();
if ("sourceRef".equals(subNode.getNodeName())) {
String source = subNode.getTextContent();
// targetRef
subNode = subNode.getNextSibling();
String target = subNode.getTextContent();
// transformation
Transformation transformation = null;
subNode = subNode.getNextSibling();
if (subNode != null && "transformation".equals(subNode.getNodeName())) {
String lang = subNode.getAttributes().getNamedItem("language").getNodeValue();
String expression = subNode.getTextContent();
DataTransformer transformer = transformerRegistry.find(lang);
if (transformer == null) {
throw new IllegalArgumentException("No transformer registered for language " + lang);
}
transformation = new Transformation(lang, expression);
// transformation.setCompiledExpression(transformer.compile(expression));
subNode = subNode.getNextSibling();
}
// assignments
List assignments = new LinkedList();
while(subNode != null){
org.w3c.dom.Node ssubNode = subNode.getFirstChild();
String from = ssubNode.getTextContent();
String to = ssubNode.getNextSibling().getTextContent();
assignments.add(new Assignment("XPath", from, to));
subNode = subNode.getNextSibling();
}
workItemNode.addInAssociation(new DataAssociation(
source,
dataInputs.get(target), assignments, transformation));
} else {
// targetRef
String to = subNode.getTextContent();
// assignment
subNode = subNode.getNextSibling();
if (subNode != null) {
org.w3c.dom.Node subSubNode = subNode.getFirstChild();
NodeList nl = subSubNode.getChildNodes();
if (nl.getLength() > 1) {
// not supported ?
workItemNode.getWork().setParameter(dataInputs.get(to), subSubNode.getTextContent());
return;
} else if (nl.getLength() == 0) {
return;
}
Object result = null;
Object from = nl.item(0);
if (from instanceof Text) {
String text = ((Text) from).getTextContent();
if (text.startsWith("\"") && text.endsWith("\"")) {
result = text.substring(1, text.length() -1);
} else {
result = text;
}
} else {
result = nl.item(0);
}
workItemNode.getWork().setParameter(dataInputs.get(to), result);
}
}
}
protected void readDataOutputAssociation(org.w3c.dom.Node xmlNode, WorkItemNode workItemNode, Map dataOutputs) {
// sourceRef
org.w3c.dom.Node subNode = xmlNode.getFirstChild();
String source = subNode.getTextContent();
// targetRef
subNode = subNode.getNextSibling();
String target = subNode.getTextContent();
// transformation
Transformation transformation = null;
subNode = subNode.getNextSibling();
if (subNode != null && "transformation".equals(subNode.getNodeName())) {
String lang = subNode.getAttributes().getNamedItem("language").getNodeValue();
String expression = subNode.getTextContent();
DataTransformer transformer = transformerRegistry.find(lang);
if (transformer == null) {
throw new IllegalArgumentException("No transformer registered for language " + lang);
}
transformation = new Transformation(lang, expression, source);
// transformation.setCompiledExpression(transformer.compile(expression));
subNode = subNode.getNextSibling();
}
// assignments
List assignments = new LinkedList();
while(subNode != null){
org.w3c.dom.Node ssubNode = subNode.getFirstChild();
String from = ssubNode.getTextContent();
String to = ssubNode.getNextSibling().getTextContent();
assignments.add(new Assignment("XPath", from, to));
subNode = subNode.getNextSibling();
}
workItemNode.addOutAssociation(new DataAssociation(dataOutputs.get(source), target, assignments, transformation));
}
@Override
public void writeNode(Node node, StringBuilder xmlDump, int metaDataType) {
throw new IllegalArgumentException(
"Writing out should be handled by the WorkItemNodeHandler");
}
public Object end(final String uri, final String localName,
final ExtensibleXmlParser parser) throws SAXException {
final Element element = parser.endElementBuilder();
Node node = (Node) parser.getCurrent();
// determine type of event definition, so the correct type of node can be generated
handleNode(node, element, uri, localName, parser);
org.w3c.dom.Node xmlNode = element.getFirstChild();
int uniqueIdGen = 1;
while (xmlNode != null) {
String nodeName = xmlNode.getNodeName();
if ("multiInstanceLoopCharacteristics".equals(nodeName)) {
// create new timerNode
ForEachNode forEachNode = new ForEachNode();
forEachNode.setId(node.getId());
String uniqueId = (String) node.getMetaData().get("UniqueId");
forEachNode.setMetaData("UniqueId", uniqueId);
node.setMetaData("UniqueId", uniqueId + ":" + uniqueIdGen++);
forEachNode.addNode(node);
forEachNode.linkIncomingConnections(NodeImpl.CONNECTION_DEFAULT_TYPE, node.getId(), NodeImpl.CONNECTION_DEFAULT_TYPE);
forEachNode.linkOutgoingConnections(node.getId(), NodeImpl.CONNECTION_DEFAULT_TYPE, NodeImpl.CONNECTION_DEFAULT_TYPE);
Node orignalNode = node;
node = forEachNode;
handleForEachNode(node, element, uri, localName, parser);
// remove output collection data output of for each to avoid problems when running in variable strict mode
if (orignalNode instanceof WorkItemNode) {
((WorkItemNode)orignalNode).adjustOutMapping(forEachNode.getOutputCollectionExpression());
}
break;
}
xmlNode = xmlNode.getNextSibling();
}
NodeContainer nodeContainer = (NodeContainer) parser.getParent();
nodeContainer.addNode(node);
((ProcessBuildData) parser.getData()).addNode(node);
return node;
}
protected void handleForEachNode(final Node node, final Element element, final String uri,
final String localName, final ExtensibleXmlParser parser) throws SAXException {
ForEachNode forEachNode = (ForEachNode) node;
org.w3c.dom.Node xmlNode = element.getFirstChild();
while (xmlNode != null) {
String nodeName = xmlNode.getNodeName();
if ("dataInputAssociation".equals(nodeName)) {
readDataInputAssociation(xmlNode, inputAssociation);
} else if ("dataOutputAssociation".equals(nodeName)) {
readDataOutputAssociation(xmlNode, outputAssociation);
} else if ("multiInstanceLoopCharacteristics".equals(nodeName)) {
readMultiInstanceLoopCharacteristics(xmlNode, forEachNode, parser);
}
xmlNode = xmlNode.getNextSibling();
}
}
}
