Returns the username of a user entered in the "setup participants" as String.

Felipe Dos Santos Oliveira‌,

I know this post is a year old, but I just wanted to circle back and mention that I appreciate you sharing this code.  I've wanted to implement this for quite a long time.  I just never got around to it.

In my case, I wanted to save the list of users in a certain role to a workflow variable called tester.  Later, an email notification is sent that calls out the tester variable in the email message.  Here is my implementation (workflow expression robot after the setup participants task is completed).  It might not be the most efficient way, but it works.  I also haven't taken the time to move this into a custom class yet.  So still calling it out from a workflow expression robot for now.

Thanks to Yogesh Bagul‌‌ also, for the mention of getPrincipalDisplayIdentifier().

    java.util.Enumeration list = null;
    wt.org.WTPrincipal principal = null;
    wt.workflow.engine.WfProcess wfprocess = null;
    tester = ""; // this is a workflow variable, so doesn't need to get instantiated
    try {
        // Try to get the workflow process from "self"
        if(self.getObject().getClass().isAssignableFrom(wt.workflow.engine.WfProcess.class)){
            wfprocess = (wt.workflow.engine.WfProcess)self.getObject();
        }
        // Create a list of the users in the TESTER role
        list = wfprocess.getPrincipals(wt.project.Role.toRole("TESTER"));
        // Go through the list and add the user's full name to the variable "tester"
        while (list.hasMoreElements()){
            principal = ((wt.org.WTPrincipalReference)list.nextElement()).getPrincipal();
            tester += principal.getPrincipalDisplayIdentifier() + " & ";
        }
        // Trim the last 3 characters which are: " & "
        if (tester.length() > 3) {
            tester = tester.substring(0, tester.length()-3);
        }
    } catch (wt.util.WTException wex) {
        System.out.println(wex.getLocalizedMessage());
    }