Set enum value to process variable

[ic2h]

Hi!

We have to save process instance variable which is enum. For example: workflow has variable general_status which contains one of values:

public enum IwGeneralStatus
{
 IN_WORK("InWork"),
 WAITING_FOR_APPROVAL("WaitingForApproval"),
 WAITING_FOR_PAYMENT("WaitingForPayment"),
 PAID("Paid"),
 COMPLETED("completed");
    
    // ...
}‍‍‍‍‍‍‍‍‍‍

We wanted to set one of this values via BPMN diagram when task being executed. So, we created a Service task which contains expression ${iwGeneralStatus.IN_WORK}‍  and tried to save it to our general_status:

but got next exception:

org.activiti.engine.ActivitiException: Unknown property used in expression: ${iwGeneralStatus.IN_WORK}‍‍‍‍‍

Is there a way to save enum to process variable via diagram?

[ic2h · Accepted solution]

After long research I've found a way to put object value to process instance variable via Script task.

I used groovy scripting with following code:

import com.iw.rest.api.v1.groups.domain.IwGroup;

IwGroup initiatorGroup = new IwGroup("IW_INITIATOR");
IwGroup legalGroup = new IwGroup("IW_LEGAL");
IwGroup projectManagerGroup = new IwGroup("IW_PM");
IwGroup accountantGroup = new IwGroup("IW_ACCOUNTANT");

List<IwGroup> groups = [        
initiatorGroup,    
legalGroup,    
projectManagerGroup,    
accountantGroup
]

execution.setVariable("group_sequence", groups);‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

Same thing could be used for enums:

execution.setVariable("general_status", com.iw.rest.api.v1.workflows.domain.IwGeneralStatus.IN_WORK);‍

Keep in mind that if you use groovy language in script task than you have to set script format field to groovy.

Otherwise it won't work.