Connect task elements programmatically

Developers Modeler
1

Hello,
Can you please give some hint and guidance in order to implement below case:

i have a custom task that will be dropped in the diagram then all other tasks will connect to it implictly without using the sequence/Message flow action,
then i would like to produce a bpmn xml files which contains a custom task which has connection to all other tasks but the rendring in the diagram will hide this connection.

Expected Bpmn xml document:

  <?xml version="1.0" encoding="UTF-8"?>
    <bpmn:definitions xmlns:bpmn="http://www.omg.org/spec/BPMN/20100524/MODEL" xmlns:bpmndi="http://www.omg.org/spec/BPMN/20100524/DI" xmlns:di="http://www.omg.org/spec/DD/20100524/DI" xmlns:dc="http://www.omg.org/spec/DD/20100524/DC" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" id="Definitions_1" targetNamespace="http://bpmn.io/schema/bpmn">
      <bpmn:process id="Process_1" isExecutable="false">
        <bpmn:startEvent id="StartEvent_1" name="Start">
          <bpmn:outgoing>SequenceFlow_0hft36n</bpmn:outgoing>
        </bpmn:startEvent>
        <bpmn:task id="Task_18d2r4l" name="In Progress">
          <bpmn:incoming>SequenceFlow_0hft36n</bpmn:incoming>
          <bpmn:incoming>SequenceFlow_03ifuok</bpmn:incoming>
          <bpmn:outgoing>SequenceFlow_1jtudln</bpmn:outgoing>
          <bpmn:outgoing>SequenceFlow_0tddfhk</bpmn:outgoing>
        </bpmn:task>
        <bpmn:sequenceFlow id="SequenceFlow_0hft36n" sourceRef="StartEvent_1" targetRef="Task_18d2r4l" />
        <bpmn:endEvent id="EndEvent_0zyl0iw" name="End">
          <bpmn:incoming>SequenceFlow_1jtudln</bpmn:incoming>
          <bpmn:incoming>SequenceFlow_0zw5ha9</bpmn:incoming>
        </bpmn:endEvent>
        <bpmn:sequenceFlow id="SequenceFlow_1jtudln" sourceRef="Task_18d2r4l" targetRef="EndEvent_0zyl0iw" />
        <bpmn:task id="Task_10qizfe" name="Approved">
          <bpmn:incoming>SequenceFlow_0tddfhk</bpmn:incoming>
          <bpmn:outgoing>SequenceFlow_0zw5ha9</bpmn:outgoing>
          <bpmn:outgoing>SequenceFlow_03ifuok</bpmn:outgoing>
        </bpmn:task>
        <bpmn:sequenceFlow id="SequenceFlow_0tddfhk" sourceRef="Task_18d2r4l" targetRef="Task_10qizfe" />
        <bpmn:sequenceFlow id="SequenceFlow_0zw5ha9" sourceRef="Task_10qizfe" targetRef="EndEvent_0zyl0iw" />
        <bpmn:sequenceFlow id="SequenceFlow_03ifuok" sourceRef="Task_10qizfe" targetRef="Task_18d2r4l" />
      </bpmn:process>
      <bpmndi:BPMNDiagram id="BPMNDiagram_1">
        <bpmndi:BPMNPlane id="BPMNPlane_1" bpmnElement="Process_1">
          <bpmndi:BPMNShape id="_BPMNShape_StartEvent_2" bpmnElement="StartEvent_1">
            <dc:Bounds x="173" y="102" width="36" height="36" />
          </bpmndi:BPMNShape>
          <bpmndi:BPMNShape id="Task_18d2r4l_di" bpmnElement="Task_18d2r4l">
            <dc:Bounds x="283" y="80" width="100" height="80" />
          </bpmndi:BPMNShape>
          <bpmndi:BPMNEdge id="SequenceFlow_0hft36n_di" bpmnElement="SequenceFlow_0hft36n">
            <di:waypoint xsi:type="dc:Point" x="209" y="120" />
            <di:waypoint xsi:type="dc:Point" x="283" y="120" />
            <bpmndi:BPMNLabel>
              <dc:Bounds x="201" y="110" width="90" height="20" />
            </bpmndi:BPMNLabel>
          </bpmndi:BPMNEdge>
          <bpmndi:BPMNShape id="EndEvent_0zyl0iw_di" bpmnElement="EndEvent_0zyl0iw">
            <dc:Bounds x="569" y="102" width="36" height="36" />
            <bpmndi:BPMNLabel>
              <dc:Bounds x="542" y="138" width="90" height="20" />
            </bpmndi:BPMNLabel>
          </bpmndi:BPMNShape>
          <bpmndi:BPMNEdge id="SequenceFlow_1jtudln_di" bpmnElement="SequenceFlow_1jtudln">
            <di:waypoint xsi:type="dc:Point" x="383" y="120" />
            <di:waypoint xsi:type="dc:Point" x="569" y="120" />
            <bpmndi:BPMNLabel>
              <dc:Bounds x="431" y="110" width="90" height="20" />
            </bpmndi:BPMNLabel>
          </bpmndi:BPMNEdge>
          <bpmndi:BPMNShape id="Task_10qizfe_di" bpmnElement="Task_10qizfe">
            <dc:Bounds x="282" y="203" width="100" height="80" />
          </bpmndi:BPMNShape>
          <bpmndi:BPMNEdge id="SequenceFlow_0zw5ha9_di" bpmnElement="SequenceFlow_0zw5ha9">
            <di:waypoint xsi:type="dc:Point" x="382" y="243" />
            <di:waypoint xsi:type="dc:Point" x="476" y="243" />
            <di:waypoint xsi:type="dc:Point" x="575" y="133" />
            <bpmndi:BPMNLabel>
              <dc:Bounds x="431" y="168" width="90" height="20" />
            </bpmndi:BPMNLabel>
          </bpmndi:BPMNEdge>
        </bpmndi:BPMNPlane>
      </bpmndi:BPMNDiagram>
    </bpmn:definitions>

Thank you.

2

You can connect elements programatically, simply by using Modeling#connect(source, target). Elements rendered in the XML are tightly connected to what is visible on the diagram though. As a result, what you request will be hard to achive.

I personally do not think it is a good thing to deliberately hide certain important parts of the diagram from users.

1 Like
3

Hello Nikku,
Thanks for your response, could you please point me to the below method name:

  1. where the bpmn:task element and bpmndi:BPMNShape is defined when dropped into the diagram?

  2. In which source code file the modeling.connect(source, target) method is implemented?

Thank you in advance
kind regards,

4

Hello Bpmn Team,
is there any update regarding this request.

kind regards,