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org.jbpm.bpmn2.xml.StartEventHandler Maven / Gradle / Ivy
/*
* Copyright 2017 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.ArrayList;
import java.util.List;
import java.util.Map;
import org.drools.compiler.compiler.xml.XmlDumper;
import org.drools.core.xml.ExtensibleXmlParser;
import org.jbpm.bpmn2.core.Error;
import org.jbpm.bpmn2.core.Escalation;
import org.jbpm.bpmn2.core.Message;
import org.jbpm.bpmn2.core.Signal;
import org.jbpm.compiler.xml.ProcessBuildData;
import org.jbpm.process.core.event.EventFilter;
import org.jbpm.process.core.event.EventTransformerImpl;
import org.jbpm.process.core.event.EventTypeFilter;
import org.jbpm.process.core.event.NonAcceptingEventTypeFilter;
import org.jbpm.process.core.impl.DataTransformerRegistry;
import org.jbpm.process.core.timer.Timer;
import org.jbpm.workflow.core.Node;
import org.jbpm.workflow.core.impl.DroolsConsequenceAction;
import org.jbpm.workflow.core.node.ConstraintTrigger;
import org.jbpm.workflow.core.node.EventSubProcessNode;
import org.jbpm.workflow.core.node.EventTrigger;
import org.jbpm.workflow.core.node.StartNode;
import org.jbpm.workflow.core.node.Transformation;
import org.jbpm.workflow.core.node.Trigger;
import org.kie.api.runtime.process.DataTransformer;
import org.w3c.dom.Element;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
public class StartEventHandler extends AbstractNodeHandler {
private DataTransformerRegistry transformerRegistry = DataTransformerRegistry.get();
@Override
protected Node createNode(Attributes attrs) {
return new StartNode();
}
@Override
@SuppressWarnings("unchecked")
public Class generateNodeFor() {
return StartNode.class;
}
@Override
@SuppressWarnings("unchecked")
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);
StartNode startNode = (StartNode) node;
// TODO: StartEventHandler.handleNode(): the parser doesn't discriminate between the schema default and the actual set value
// However, while the schema says the "isInterrupting" attr should default to true
// The spec says that Escalation start events should default to not interrupting..
startNode.setInterrupting(Boolean.parseBoolean(element.getAttribute("isInterrupting")));
org.w3c.dom.Node xmlNode = element.getFirstChild();
while (xmlNode != null) {
String nodeName = xmlNode.getNodeName();
if ("dataOutput".equals(nodeName)) {
readDataOutput(xmlNode);
} else if ("dataOutputAssociation".equals(nodeName)) {
readDataOutputAssociation(xmlNode, startNode);
} else if ("outputSet".equals(nodeName)) {
// p. 225, BPMN2 spec (2011-01-03)
// InputSet and OutputSet elements imply that process execution should wait for them to be filled
// and are therefore not applicable to catch events
String message = "Ignoring <" + nodeName + "> element: "
+ "<" + nodeName + "> elements should not be used on start or other catch events.";
SAXParseException saxpe = new SAXParseException(message, parser.getLocator());
parser.warning(saxpe);
// no exception thrown for backwards compatibility (we used to ignore these elements)
} else if ("conditionalEventDefinition".equals(nodeName)) {
String constraint = null;
org.w3c.dom.Node subNode = xmlNode.getFirstChild();
while (subNode != null) {
String subnodeName = subNode.getNodeName();
if ("condition".equals(subnodeName)) {
constraint = xmlNode.getTextContent();
break;
}
subNode = subNode.getNextSibling();
}
ConstraintTrigger trigger = new ConstraintTrigger();
trigger.setConstraint(constraint);
startNode.addTrigger(trigger);
break;
} else if ("signalEventDefinition".equals(nodeName)) {
String type = ((Element) xmlNode).getAttribute("signalRef");
type = checkSignalAndConvertToRealSignalNam(parser, type);
if (type != null && type.trim().length() > 0) {
addTriggerWithInMappings(startNode, type);
}
} else if ("messageEventDefinition".equals(nodeName)) {
String messageRef = ((Element) xmlNode).getAttribute("messageRef");
Map messages = (Map)
((ProcessBuildData) parser.getData()).getMetaData("Messages");
if (messages == null) {
throw new IllegalArgumentException("No messages found");
}
Message message = messages.get(messageRef);
if (message == null) {
throw new IllegalArgumentException("Could not find message " + messageRef);
}
startNode.setMetaData("MessageType", message.getType());
addTriggerWithInMappings(startNode, "Message-" + message.getName());
} else if ("timerEventDefinition".equals(nodeName)) {
handleTimerNode(startNode, element, uri, localName, parser);
// following event definitions are only for event sub process and will be validated to not be included in top process definitions
} else if ("errorEventDefinition".equals(nodeName)) {
if (!startNode.isInterrupting()) {
// BPMN2 spec (p.245-246, (2011-01-03)) implies that
// - a in an Event Sub-Process
// - *without* the 'isInterupting' attribute always interrupts (containing process)
String errorMsg = "Error Start Events in an Event Sub-Process always interrupt the containing (sub)process(es).";
throw new IllegalArgumentException(errorMsg);
}
String errorRef = ((Element) xmlNode).getAttribute("errorRef");
if (errorRef != null && errorRef.trim().length() > 0) {
List errors = (List) ((ProcessBuildData) parser.getData()).getMetaData("Errors");
if (errors == null) {
throw new IllegalArgumentException("No errors found");
}
Error error = null;
for (Error listError : errors) {
if (errorRef.equals(listError.getId())) {
error = listError;
}
}
if (error == null) {
throw new IllegalArgumentException("Could not find error " + errorRef);
}
startNode.setMetaData("FaultCode", error.getErrorCode());
addTriggerWithInMappings(startNode, "Error-" + error.getErrorCode());
}
} else if ("escalationEventDefinition".equals(nodeName)) {
String escalationRef = ((Element) xmlNode).getAttribute("escalationRef");
if (escalationRef != null && escalationRef.trim().length() > 0) {
Map escalations = (Map)
((ProcessBuildData) parser.getData()).getMetaData(ProcessHandler.ESCALATIONS);
if (escalations == null) {
throw new IllegalArgumentException("No escalations found");
}
Escalation escalation = escalations.get(escalationRef);
if (escalation == null) {
throw new IllegalArgumentException("Could not find escalation " + escalationRef);
}
addTriggerWithInMappings(startNode, "Escalation-" + escalation.getEscalationCode());
}
} else if ("compensateEventDefinition".equals(nodeName)) {
handleCompensationNode(startNode, xmlNode);
}
xmlNode = xmlNode.getNextSibling();
}
}
private void addTriggerWithInMappings(StartNode startNode, String triggerEventType) {
EventTrigger trigger = new EventTrigger();
EventTypeFilter eventFilter = new EventTypeFilter();
eventFilter.setType(triggerEventType);
trigger.addEventFilter(eventFilter);
String mapping = (String) startNode.getMetaData("TriggerMapping");
if (mapping != null) {
trigger.addInMapping(mapping, startNode.getOutMapping(mapping));
}
startNode.addTrigger(trigger);
}
public Object end(final String uri, final String localName,
final ExtensibleXmlParser parser) throws SAXException {
StartNode startNode = (StartNode) super.end(uri, localName, parser);
return startNode;
}
protected void readDataOutputAssociation(org.w3c.dom.Node xmlNode, StartNode startNode) {
// sourceRef
org.w3c.dom.Node subNode = xmlNode.getFirstChild();
if (!"sourceRef".equals(subNode.getNodeName())) {
throw new IllegalArgumentException("No sourceRef found in dataOutputAssociation in startEvent");
}
String source = subNode.getTextContent();
if (dataOutputs.get(source) == null) {
throw new IllegalArgumentException("No dataOutput could be found for the dataOutputAssociation.");
}
// targetRef
subNode = subNode.getNextSibling();
if (!"targetRef".equals(subNode.getNodeName())) {
throw new IllegalArgumentException("No targetRef found in dataOutputAssociation in startEvent");
}
String target = subNode.getTextContent();
startNode.setMetaData("TriggerMapping", target);
// 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, dataOutputs.get(source));
startNode.setMetaData("Transformation", transformation);
startNode.setEventTransformer(new EventTransformerImpl(transformation));
subNode = subNode.getNextSibling();
}
if (subNode != null) {
// no support for assignments
throw new UnsupportedOperationException(subNode.getNodeName() + " elements in dataOutputAssociations are not yet supported.");
}
startNode.addOutMapping(target, dataOutputs.get(source));
}
// The results of this method are only used to check syntax
protected void readDataOutput(org.w3c.dom.Node xmlNode) {
String id = ((Element) xmlNode).getAttribute("id");
String outputName = ((Element) xmlNode).getAttribute("name");
dataOutputs.put(id, outputName);
}
@Override
public void writeNode(Node node, StringBuilder xmlDump, int metaDataType) {
StartNode startNode = (StartNode) node;
writeNode("startEvent", startNode, xmlDump, metaDataType);
xmlDump.append(" isInterrupting=\"");
if (startNode.isInterrupting()) {
xmlDump.append("true");
} else {
xmlDump.append("false");
}
xmlDump.append("\">" + EOL);
writeExtensionElements(startNode, xmlDump);
List triggers = startNode.getTriggers();
if (triggers != null) {
if (triggers.size() > 1) {
throw new IllegalArgumentException("Multiple start triggers not supported");
}
Trigger trigger = triggers.get(0);
if (trigger instanceof ConstraintTrigger) {
ConstraintTrigger constraintTrigger = (ConstraintTrigger) trigger;
if (constraintTrigger.getHeader() == null) {
xmlDump.append(" " + EOL);
xmlDump.append(" " + constraintTrigger.getConstraint() + " " + EOL);
xmlDump.append(" " + EOL);
}
} else if (trigger instanceof EventTrigger) {
EventTrigger eventTrigger = (EventTrigger) trigger;
String mapping = null;
String nameMapping = "event";
if (!trigger.getInMappings().isEmpty()) {
mapping = eventTrigger.getInMappings().keySet().iterator().next();
nameMapping = eventTrigger.getInMappings().values().iterator().next();
} else {
mapping = (String) startNode.getMetaData("TriggerMapping");
}
if (mapping != null) {
xmlDump.append(
" " + EOL +
" _" + startNode.getId() + "_Output " + EOL +
" " + mapping + " " + EOL +
" " + EOL);
}
String type = ((EventTypeFilter) eventTrigger.getEventFilters().get(0)).getType();
if (type.startsWith("Message-")) {
type = type.substring(8);
xmlDump.append(" " + EOL);
if (timer != null && (timer.getDelay() != null || timer.getDate() != null)) {
if (timer.getTimeType() == Timer.TIME_DATE) {
xmlDump.append(" " + XmlDumper.replaceIllegalChars(timer.getDate()) + " " + EOL);
} else if (timer.getTimeType() == Timer.TIME_DURATION) {
xmlDump.append(" " + XmlDumper.replaceIllegalChars(timer.getDelay()) + " " + EOL);
} else if (timer.getTimeType() == Timer.TIME_CYCLE) {
if (timer.getPeriod() != null) {
xmlDump.append(" " + XmlDumper.replaceIllegalChars(timer.getDelay()) + "###" + XmlDumper.replaceIllegalChars(timer.getPeriod()) + " " + EOL);
} else {
xmlDump.append(" " + XmlDumper.replaceIllegalChars(timer.getDelay()) + " " + EOL);
}
}
}
xmlDump.append(" " + EOL);
}
} else if (startNode.getTimer() != null) {
Timer timer = startNode.getTimer();
xmlDump.append(" " + EOL);
if (timer != null && (timer.getDelay() != null || timer.getDate() != null)) {
if (timer.getTimeType() == Timer.TIME_DATE) {
xmlDump.append(" " + XmlDumper.replaceIllegalChars(timer.getDate()) + " " + EOL);
} else if (timer.getTimeType() == Timer.TIME_DURATION) {
xmlDump.append(" " + XmlDumper.replaceIllegalChars(timer.getDelay()) + " " + EOL);
} else if (timer.getTimeType() == Timer.TIME_CYCLE) {
if (timer.getPeriod() != null) {
xmlDump.append(" " + XmlDumper.replaceIllegalChars(timer.getDelay()) + "###" + XmlDumper.replaceIllegalChars(timer.getPeriod()) + " " + EOL);
} else {
xmlDump.append(" " + XmlDumper.replaceIllegalChars(timer.getDelay()) + " " + EOL);
}
}
}
xmlDump.append(" " + EOL);
}
endNode("startEvent", xmlDump);
}
protected void handleTimerNode(final Node node, final Element element,
final String uri, final String localName,
final ExtensibleXmlParser parser) throws SAXException {
super.handleNode(node, element, uri, localName, parser);
StartNode startNode = (StartNode) node;
org.w3c.dom.Node xmlNode = element.getFirstChild();
while (xmlNode != null) {
String nodeName = xmlNode.getNodeName();
if ("timerEventDefinition".equals(nodeName)) {
Timer timer = new Timer();
org.w3c.dom.Node subNode = xmlNode.getFirstChild();
while (subNode instanceof Element) {
String subNodeName = subNode.getNodeName();
if ("timeCycle".equals(subNodeName)) {
String delay = subNode.getTextContent();
int index = delay.indexOf("###");
if (index != -1) {
String period = delay.substring(index + 3);
delay = delay.substring(0, index);
timer.setPeriod(period);
} else {
timer.setPeriod(delay);
}
timer.setTimeType(Timer.TIME_CYCLE);
timer.setDelay(delay);
break;
} else if ("timeDuration".equals(subNodeName)) {
String delay = subNode.getTextContent();
timer.setTimeType(Timer.TIME_DURATION);
timer.setDelay(delay);
break;
} else if ("timeDate".equals(subNodeName)) {
String date = subNode.getTextContent();
timer.setTimeType(Timer.TIME_DATE);
timer.setDate(date);
break;
}
subNode = subNode.getNextSibling();
}
startNode.setTimer(timer);
if (parser.getParent() instanceof EventSubProcessNode) {
// handle timer on start events like normal (non rule) timers for event sub process
EventTrigger trigger = new EventTrigger();
EventTypeFilter eventFilter = new EventTypeFilter();
eventFilter.setType("Timer-" + ((EventSubProcessNode) parser.getParent()).getId());
trigger.addEventFilter(eventFilter);
String mapping = (String) startNode.getMetaData("TriggerMapping");
if (mapping != null) {
trigger.addInMapping(mapping, "event");
}
startNode.addTrigger(trigger);
((EventSubProcessNode) parser.getParent()).addTimer(timer, new DroolsConsequenceAction("java", ""));
}
}
xmlNode = xmlNode.getNextSibling();
}
}
protected void handleCompensationNode(final StartNode startNode, final org.w3c.dom.Node xmlNode) {
if (startNode.isInterrupting()) {
logger.warn("Compensation Event Sub-Processes [" + startNode.getMetaData("UniqueId") + "] may not be specified as interrupting:" +
" overriding attribute and setting to not-interrupting.");
}
startNode.setInterrupting(false);
/** From the BPMN2 spec, P.264:
* "For a Start Event:
* This Event "catches" the compensation for an Event Sub-Process. No further information is required.
* The Event Sub-Process will provide the id necessary to match the Compensation Event with the Event
* that threw the compensation"
*
* In other words, the id of the Sub-Process containing this Event Sub-Process is what should be used
* as the activityRef value in any Intermediate (throw) or End compensation event that targets
* this particular Event Sub-Process.
*
* This is similar to the logic used for a Compensation Boundary Event: it's signaled using
* the id of the activity to which the CBE is attached to.
*/
String activityRef = ((Element) xmlNode).getAttribute("activityRef");
if (activityRef != null && activityRef.length() > 0) {
logger.warn("activityRef value [" + activityRef + "] on Start Event '" + startNode.getMetaData("UniqueId")
+ "' ignored per the BPMN2 specification.");
}
// so that this node will get processed in ProcessHandler.postProcessNodes(...)
EventTrigger startTrigger = new EventTrigger();
EventFilter eventFilter = new NonAcceptingEventTypeFilter();
((NonAcceptingEventTypeFilter) eventFilter).setType("Compensation");
startTrigger.addEventFilter(eventFilter);
List startTriggers = new ArrayList<>();
startTriggers.add(startTrigger);
startNode.setTriggers(startTriggers);
String mapping = (String) startNode.getMetaData("TriggerMapping");
if (mapping != null) {
startTrigger.addInMapping(mapping, startNode.getOutMapping(mapping));
}
}
}
