Policy failures:

Code warning
- failed on resource User.java. Reason: The import javax.persistence.FetchType is never used, line 10
- failed on resource UserManagerBean.java. Reason: Type safety: The expression of type List needs unchecked conversion to conform to List<User>, line 7
Override reason:   
f

YACOSCore/ejbModule/org/yacos/core/conferences/IConferenceManager.java

@@ -30,7 +30,7 @@ public interface IConferenceManager {
 	
 		
 	//role et user methode
-	public void addRole(Role.RoleType roleType, String login, Integer confId);
+	public Role addRole(Role.RoleType roleType, String login, Integer confId);
 	public void removeRole(Role role);
 	public List<Role> getRoles(Conference conf);
 	public List<Role> getRoles(User user, Conference conf);

YACOSCore/ejbModule/org/yacos/core/users/User.java

@@ -4,10 +4,10 @@ import java.io.Serializable;
 import java.util.ArrayList;
 import java.util.List;
 
-
+import javax.persistence.CascadeType;
 import javax.persistence.Column;
 import javax.persistence.Entity;
-
+import javax.persistence.FetchType;
 import javax.persistence.Id;
 import javax.persistence.OneToMany;
 
@@ -60,7 +60,7 @@ public class User implements Serializable{
 	 * Roles for this user
 	 */
 	//@OneToMany(targetEntity=Role.class,mappedBy="user",fetch=FetchType.EAGER,cascade=CascadeType.ALL)
-	@OneToMany(targetEntity=Role.class,mappedBy="user")
+	@OneToMany(targetEntity=Role.class,mappedBy="user",cascade=CascadeType.ALL)
 	private List<Role> roles;
 	
 	@OneToMany(targetEntity=Article.class,mappedBy="mainAuthor")

YACOSCore/ejbModule/org/yacos/core/users/UserManagerBean.java

@@ -74,8 +74,9 @@ public class UserManagerBean implements IUserManager{
 	}
 
 	public List<User> getUsers(RoleType type) {
-		// TODO Auto-generated method stub
-		return null;
+		Query query = em.createQuery("from Role role where type = ?");
+		query.setParameter(1, type); 
+		return query.getResultList();
 	}
 
 	public List<Role> getRoles() {