problem with camunda7.4 API

[Nektarios Mitakidis]

Dear Sir/Madam,

I am using camunda 7.4 in order to recursively generate a bpmn model in eclipse. Though I have succeed in creating and writing a BPMN model in 7.1 alpha, in 7.4 there is new information added that prevents me from continuing with this work. If you could provide an example of correct usage I would be really grateful.

I provide the 7.1 source code that works (I guess it works because it passes through the validate method):

 flownoderef = createElement(lane1, "endref", FlowNodeRef.class);

   endEvent = createElement(process, "end", EndEvent.class);

   flownoderef.setTextContent("end");

   endEventShape = modelInstance.newInstance(BpmnShape.class);

   endEventShape.setId("endShape");

   endEventShape.setBpmnElement(endEvent);

   processPlane.getDiagramElements().add(endEventShape);

   

//usertask created through recursion that acts as the previous node

   BpmnModelElementInstance task2 = createProcessrecursively(formulas.get(leftHandSide), process, (BpmnModelElementInstance) startEvent);

   

   // create flows

   SequenceFlow flow = createSequenceFlow(process, (FlowNode)task2, endEvent);

   

   BpmnEdge flowEdge = modelInstance.newInstance(BpmnEdge.class);    

   flowEdge.setId("flowEdge");

   flowEdge.setBpmnElement(flow);

   flowEdge.setSourceElement(previousshape);

   flowEdge.setTargetElement(endEventShape);

   processPlane.getDiagramElements().add(flowEdge);

   

   Bounds endEventBounds = modelInstance.newInstance(Bounds.class);

   endEventBounds.setHeight(36.0);

   endEventBounds.setWidth(36.0);

   endEventBounds.setX(xaxis+70.0);

   xaxis=xaxis+70.0;

   endEventBounds.setY(yaxis+70.0);

   yaxis=yaxis+70.0;

   endEventShape.setBounds(endEventBounds);

This is the 7.4 source code that throws this exception: "Caused by: org.xml.sax.SAXParseException; cvc-complex-type.4: Attribute 'x' must appear on element 'di:waypoint'." With comments are some things that I have tried but failed in creating a correct BpmnEdge:

                   // flownoderef = createElement(lane1, "endref", FlowNodeRef.class);

   endEvent = createElement(process, "end", EndEvent.class);

 //  flownoderef.setTextContent("end");

   endEventShape = modelInstance.newInstance(BpmnShape.class);

   endEventShape.setId("endShape");

   endEventShape.setBpmnElement(endEvent);

   processPlane.getDiagramElements().add(endEventShape);

   

   Bounds endEventBounds = modelInstance.newInstance(Bounds.class);

   endEventBounds.setHeight(36.0);

   endEventBounds.setWidth(36.0);

   endEventBounds.setX(96.0);

   xaxis=xaxis+70.0;

   endEventBounds.setY(16.0);

   yaxis=yaxis+70.0;

   endEventShape.setBounds(endEventBounds);

   

//create process Time for recursion

  // BpmnModelElementInstance task2 = createProcessrecursively(formulas.get(leftHandSide), process, (BpmnModelElementInstance) startEvent);

   

   // create flows

   SequenceFlow flow = createSequenceFlow(process, startEvent, endEvent);

   //processPlane.addChildElement(flow);

   Extension extention = modelInstance.newInstance(Extension.class);

   Waypoint waypoint = modelInstance.newInstance(Waypoint.class);

   //Attribute x = modelInstance.newInstance((Class<T>) Attribute.class);

   //waypoint.getAttributeValue("x");

   waypoint.setAttributeValue("x", "40");

   //waypoint.getAttributeValue("x");

   //waypoint.setX(40.0);

   waypoint.setAttributeValue("y", "40");

  // waypoint.getAttributeValue("y");

   //waypoint.setY(40.0);

   

   Waypoint waypoint2 = modelInstance.newInstance(Waypoint.class);

  // waypoint.setAttributeValue("x", "x");

   waypoint.getElementType();

   waypoint.setAttributeValue("x", "40");

   //waypoint.getAttributeValue("x");

   //waypoint.setX(146.0);

   waypoint.setAttributeValue("y", "40");

   //waypoint.setX("40.0");

   //waypoint.getAttributeValue("y");

   //waypoint.setY(40.0);

    

  // waypoint.addChildElement(startEvent);

   BpmnEdge flowEdge = modelInstance.newInstance(BpmnEdge.class);    

   flowEdge.setId("flowEdge");

   flowEdge.setBpmnElement(flow);

   flowEdge.setSourceElement(startEventShape);

   flowEdge.setTargetElement(endEventShape);

   flowEdge.getParentElement();

   flowEdge.setExtension(extention);

   flowEdge.getWaypoints().add(waypoint);

   flowEdge.getWaypoints().add(waypoint2);

   processPlane.addChildElement(extention);

   processPlane.addChildElement(flowEdge);

   

   //flowEdge.getWaypoints();

  // processPlane.addChildElement(flowEdge);

 

   //bpmnDiagram.setUniqueChildElementByNameNs(flowEdge);

   //processPlane.setUniqueChildElementByNameNs(flowEdge);

   //processPlane.getDiagramElements().add(flowEdge);

I hope I do not give you a lot of trouble but since I have not found any examples of correct BpmnEdge and Waypoint creation and just trying to reverse engineer bpmn models it has become a difficult riddle to pass through the validate method unscathed and write my updated bpmn model.

I hope that you can provide me with an early answer.

Respectfully yours,

Nektarios Mitakidis

[Sebastian Menski]

Hi Nektarios,

can you provide a minimal complete example which worked on 7.1 and isn't working anymore. This way I can better understand what is not working. 

Other than that there is a test case which creates valid BPMN DI for a simple start event -> end event [1].

Cheers,

Sebastian

[1] https://github.com/camunda/camunda-bpmn-model/blob/master/src/test/java/org/camunda/bpm/model/bpmn/BpmnDiTest.java#L170