Re: [rules-users] Verify if an objects attribute exists
Pattern( field != null, eval( someFunc( field ) ) )
Mark
On 14/09/2010 05:18, lnguyen wrote:
Sorry here is some additional details...I hope I'm not making
this sound more
complicated than it really is but I am attempting to restrict access to view
an account based on the logged in user.
public class User
{
private Long id;
...
private UserProfile userProfile;
}
public class UserProfile
{
private Long id;
....
private User supervisor;
}
So I created a function called isUserMatching to determine if the
currentUser is looking at their own account or if their supervisor is
looking at an employees account:
function boolean isUserMatching(User user)
{
User currentUser = (User) Component.getInstance("currentUser");
User supervisor = (User) user.getUserProfile().getSupervisor();
boolean result = false;
if(currentUser == user)
{
System.out.println("###################### currentUser = user is
TRUE #####");
result = true;
}
else if((supervisor != null)&&
(currentUser.getId().equals(supervisor.getId())))
{
System.out.println("###################### currentUser = supervisor is TRUE
#####");
result = true;
}
else
{
System.out.println("###################### currentUser/supervisor !=
user is FALSE #####");
}
return result;
}
This function works as desired but not all users have a supervisor. What I'd
like to know is how can I check if a supervisor is null so that I can
prevent passing null values into functions?
Doing this "eval (isUserMatching($supervisor))" results in an runtime error
of course when there is no supervisor.