org.json.JSONException: Duplicate key

Hello everyone! I need some precious help ...

I have the following XML file :

<?xml version="1.0" encoding="UTF-8"?>

<bpmn2:definitions>

<bpmn2:process id="defaultPackage.NewProcess2">

...

<bpmn2:userTask id="UserTask_1" name="User Task 1">

<bpmn2:incoming>SequenceFlow_1</bpmn2:incoming>

<bpmn2:outgoing>SequenceFlow_2</bpmn2:outgoing>

</bpmn2:userTask>

<bpmn2:userTask id="UserTask_2" name="User Task 2">

<bpmn2:incoming>SequenceFlow_3</bpmn2:incoming>

<bpmn2:outgoing>SequenceFlow_4</bpmn2:outgoing>

</bpmn2:userTask>

...

</bpmn2:process>

<bpmndi:BPMNDiagram id="BPMNDiagram_1">

...

<bpmndi:BPMNShape id="BPMNShape_UserTask_1" bpmnElement="UserTask_1">

<dc:Bounds height="50.0" width="110.0" x="165.0" y="205.0"/>

</bpmndi:BPMNShape>

<bpmndi:BPMNShape id="BPMNShape_UserTask_2" bpmnElement="UserTask_2">

<dc:Bounds height="50.0" width="110.0" x="550.0" y="203.0"/>

</bpmndi:BPMNShape>

...

</bpmn2:definitions>

For each userTask node defined under <bpmn2:process> </bpmn2:process> tags, I want to get theire position which is defined by x, y coordinates, which are found under :

<bpmndi:BPMNShape id="BPMNShape_UserTask_1" bpmnElement="UserTask_1">

<dc:Bounds height="50.0" width="110.0" x="165.0" y="205.0"/>

</bpmndi:BPMNShape>

inside <bpmndi:BPMNDiagram></bpmndi:BPMNDiagram> tags.

I want to append x, y coordinates to the JSON string I built to generate the attributes of every userTask node.

I tried the following code :

Java Code:

ArrayList<String> bpmnElements = getElementAttributes("bpmndi:BPMNShape", "bpmnElement");
                                                for (int j = 0; j < bpmnElements.size(); j++)
                                                {
                                                        String bpmnElement = bpmnElements.get(j);
                              if(childn.getNodeName().equals("bpmn2:userTask")){
                                
                                  ArrayList<String> idUserTask = getIds("bpmn2:userTask");
                                  
                                  for(int l=0; l < idUserTask.size(); l++){
                                          if(idUserTask.get(l).equals(bpmnElement)){
                                                  
                                                  ArrayList<String> Xs = getElementAttributes ("dc:Bounds" , "x");
                                                  ArrayList<String> Ys = getElementAttributes ("dc:Bounds" , "y");
                                                  
                                                  String x = Xs.get(j);
                                                  String y = Ys.get(j); 
                                                  jw.key("x").value(x);
                                                  jw.key("y").value(y);
                                                  
                                         }
                                  }
                              }
}

but I get the following exception:

org.json.JSONException: Duplicate key "x"

at org.json.JSONObject.putOnce(JSONObject.java:1121)

at org.json.JSONWriter.key(JSONWriter.java:207)

at Main.generateChildNodesDefinitions(Main.java:422)

at Main.main(Main.java:165)

This happens when I have more than one userTask node in my XML file, becouse when I have only one userTask node it gives me the correct output:

{"id":"UserTask_1","name":"User Task 1","x":"165.0","y":"205.0"}

When I have two or more userTask nodes in my xml file I want my output to be:

{"id":"UserTask_1","name":"User Task 1","x":"165.0","y":"205.0"}

{"id":"UserTask_2","name":"User Task 2","x":"550.0", "y":"203.0"}

I think my problem is because you I am setting the key jw.key("x").value(x);jw.key("y").value(y); for each iteration it will be like a duplicate .

I've tried almost everything to resolve this but no solution at all...

Any help please ...?