Hi, Im trying to add a custom form field type and I’m not sure what I’m missing or doing wrong.
I’ve created the java implementation
public class DateTimeField extends AbstractFormFieldType {
public static final String TYPE_NAME = "dateTime";
private String dateTimeFormat = "yyyy-MM-dd hh:mm:ss";
private DateTimeFormatter formatter = DateTimeFormatter.ofPattern(dateTimeFormat);
public String getName() {
return TYPE_NAME;
}
public TypedValue convertToModelValue(TypedValue propertyValue) {
Object value = propertyValue.getValue();
if (value == null) {
return Variables.untypedNullValue();
} else {
String strValue = ((String) value).trim();
if (strValue.isEmpty()) {
return Variables.untypedNullValue();
}
try {
return Variables.untypedValue(LocalDateTime.parse(strValue, formatter), propertyValue.isTransient());
} catch (Exception e) {
throw new ProcessEngineException("Could not parse value '" + value + "' as dateTime using date time format '" + dateTimeFormat + "'.");
}
}
}
public TypedValue convertToFormValue(TypedValue modelValue) {
if (modelValue.getValue() == null) {
return Variables.stringValue(null, modelValue.isTransient());
} else {
return Variables.stringValue(formatter.format((LocalDateTime) modelValue.getValue()), modelValue.isTransient());
}
}
@Override
public Object convertFormValueToModelValue(Object propertyValue) {
return null;
}
@Override
public String convertModelValueToFormValue(Object modelValue) {
return null;
}
}
And added it as a custom form type
@Component
public class TestConfiguration extends AbstractCamundaConfiguration {
@Override
public void preInit(SpringProcessEngineConfiguration config) {
config.getCustomFormTypes().add(new DateTimeField());
}
}
In the modular I have set the form up as follows
When I start the process I get the form shown correctly, but whenever I enter any value into the Date field I get an error
How should I be doing this so a value can be entered and submitted? Ideally it would also be good to validate the input, but just wanted to get this working first 
Thanks,
Matt
Full bpmn below
<?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:camunda="http://camunda.org/schema/1.0/bpmn" id="Definitions_0zpho6t" targetNamespace="http://bpmn.io/schema/bpmn" exporter="Camunda Modeler" exporterVersion="3.6.0">
<bpmn:process id="Process_1" isExecutable="true">
<bpmn:startEvent id="StartEvent_1" name="Start workflow">
<bpmn:extensionElements>
<camunda:formData>
<camunda:formField id="M_Message" label="Message" type="string" />
<camunda:formField id="D_Action" label="Date" type="dateTime" />
</camunda:formData>
</bpmn:extensionElements>
<bpmn:outgoing>SequenceFlow_12a8jo4</bpmn:outgoing>
</bpmn:startEvent>
<bpmn:serviceTask id="Task_163mbh3" name="Do something" camunda:delegateExpression="${blankDelegate}">
<bpmn:incoming>SequenceFlow_12a8jo4</bpmn:incoming>
<bpmn:outgoing>SequenceFlow_1id5mog</bpmn:outgoing>
</bpmn:serviceTask>
<bpmn:sequenceFlow id="SequenceFlow_12a8jo4" sourceRef="StartEvent_1" targetRef="Task_163mbh3" />
<bpmn:endEvent id="EndEvent_06qupyv">
<bpmn:incoming>SequenceFlow_1id5mog</bpmn:incoming>
</bpmn:endEvent>
<bpmn:sequenceFlow id="SequenceFlow_1id5mog" sourceRef="Task_163mbh3" targetRef="EndEvent_06qupyv" />
</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:BPMNLabel>
<dc:Bounds x="156" y="145" width="70" height="14" />
</bpmndi:BPMNLabel>
</bpmndi:BPMNShape>
<bpmndi:BPMNShape id="ServiceTask_0wp3f5l_di" bpmnElement="Task_163mbh3">
<dc:Bounds x="249" y="80" width="100" height="80" />
</bpmndi:BPMNShape>
<bpmndi:BPMNEdge id="SequenceFlow_12a8jo4_di" bpmnElement="SequenceFlow_12a8jo4">
<di:waypoint x="209" y="120" />
<di:waypoint x="249" y="120" />
</bpmndi:BPMNEdge>
<bpmndi:BPMNShape id="EndEvent_06qupyv_di" bpmnElement="EndEvent_06qupyv">
<dc:Bounds x="392" y="102" width="36" height="36" />
</bpmndi:BPMNShape>
<bpmndi:BPMNEdge id="SequenceFlow_1id5mog_di" bpmnElement="SequenceFlow_1id5mog">
<di:waypoint x="349" y="120" />
<di:waypoint x="392" y="120" />
</bpmndi:BPMNEdge>
</bpmndi:BPMNPlane>
</bpmndi:BPMNDiagram>
</bpmn:definitions>