[SOLVED] FusionAuth setting preferred languages using the java client

FusionAuth setting preferred languages using the java client

I'm using the fusionauth java client in my application to integrate with fusionauth. When user is registering I want to set him the preferredLanguages in order to send him a verification email in the desired language. The User object has the field preferredLanguages marked as final and there is no possibility to set in the constructors. How can I do that ?

Solution

All FusionAuth domain objects are open (i.e. not immutable). You can use the Builder pattern with the Buildable interface in FusionAuth's Java client to set values easily.

Here's how some code might look:

User u = new User().with(u -> u.preferredLanguages.add(Locale.English))
                   .with(u -> u.firstName = "Bob")
                   ...

Since preferredLanguages is a List<Locale>, you can also use addAll and any other List methods.

While this method doesn't ensure that the User object is completely filled out immediately after the constructor returns, Java will ensure that the variable User u from my example is fully filled out because the with methods all need to return before the left-side assignment is made.