In a Listener on "Issue Created," how can I check whether a Component has a Lead or not?

[Kelly]

I'm using ScriptRunner to automatically set Assignee based on Component Lead through a Listener. I realize this functionality is already natively available in Jira, so a Listener isn't necessary. However, I want to use the script because I need to make sure the issue doesn't just get created as Unassigned if there's not a Component Lead. If there's not a Component Lead, then I want to use an alternate Assignee (based on a different field).

So far, I have the assignment part working when there's a Component Lead. How do I check whether the Component Lead is null? I'm currently getting this error, so I'm not sure about  how to handle it:

Cannot invoke method getDirectoryUser() on null object

...
if (components)
     {
          lead = components?.first()?.componentLead.getDirectoryUser() 
          leadUser = userManager.getUserByName(lead.name)

     if ( (!issue.assignee) && (components) )
          { 
               newAssignee = leadUser 
               issue.setAssignee(newAssignee)
               issueManager.updateIssue(commentUser, issue, EventDispatchOption.ISSUE_UPDATED, false) 
          }

     }
...

[Deniz Oğuz - The Starware · Accepted solution]

Why do you need to convert it to directory user? I think following will do the trick?

def lead = components?.first()?.componentLead;
def hasLead = lead != null;

[Kelly]

Hi Deniz. You're absolutely right. I can't remember what my original logic was for converting it, but I tried your suggestion and that one worked perfectly. Thank you so much!