Crowd : Getting all users removing duplicates in an application using Crowd REST java client

1. //your crowd server settings
2. String url = "http://auth.staging.company.com/crowd/";//crowd base url
3. String applicationName = "appincrowd";
4. String applicationPass = "apppassword";
5. String groupName = "usergroup";//a user group under the app
6. CrowdClient client = new RestCrowdClientFactory().newInstance(url, applicationName, applicationPass);
7. //initialze crowd client

1. //a single user can be more than one group,so let's remove duplicate users by using Set
2.         Set<CrowdUser> allCrowdUsers = new HashSet<>();
3.         List<String> newGroupList = client.searchGroupNames(NullRestrictionImpl.INSTANCE, 0, maxGroupSearchResult);
5.         //get all users in a single list
6.         for (String currGroupName : newGroupList) {
7.             List<User> currGroupUsers = client.getUsersOfGroup(currGroupName, 0, maxUserSearchResult);
8.             for (User grpUser : currGroupUsers) {
9.                 allCrowdUsers.add(new CrowdUser(grpUser));
10.             }
11.         }
13.         //traverse the all users list
14.         for (User usr : allCrowdUsers) {
15.             System.out.println(usr.getName() + " " + usr.getFirstName() + " " + usr.getLastName() + " (" + usr.getEmailAddress() + ")");
17.         }

Output:

1. //john cooper (cooper@company.com)
2. //sam peters (sam@company.com)
3. //...............................
4. //Istiak Ahmad (iask@company.com)

Extended crowd user class:

CrowdUser.java:

1. import com.atlassian.crowd.model.user.User;
2. import com.atlassian.crowd.model.user.UserTemplate;
4. /**
5. *Extend user with overridden equals() and hashCode() method according to user email address so that we can build a collection(Set<>) with no different users with same email address
6. *
7. */
8. public class CrowdUser extends UserTemplate {
10.     public CrowdUser(User user) {
11.         super(user);
12.     }
13.     /**
14.      compare only user email address
15.      */
16.     @Override
17.     public boolean equals(Object object) {
18.         boolean result = false;
19.         if (object == null || object.getClass() != getClass()) {
20.             result = false;
21.         } else {
22.             CrowdUser muser = (CrowdUser) object;
23.             if (this.getEmailAddress().compareTo(muser.getEmailAddress()) == 0) {
24.                 result = true;
25.             }
26.         }
27.         return result;
28.     }
30.     // only email address
31.     @Override
32.     public int hashCode() {
34.         return this.getEmailAddress().hashCode();
35.     }
37.     
38. }