I understand I can declare a variable with the final keyword as below...
private final List<User> userList = [SELECT Id FROM User];
... That will generate an array that, when supplied with a value, can't be changed. I'd like to do the same thing, only using a Map.
I've tried:
private final Map<Id, User> userList = [SELECT Id FROM User];
But I can an error arround trying to supply a List<> type to a Map<>, which I understand. Additionally I've tried:
private final Map<Id, User> mapUserIdToUser {
get {
if (mapUserIdToUser == null) {
mapUserIdToUser = new Map<Id, User>();
for (User user : [SELECT Id FROM User]) {
mapUserIdToUser.put(user.Id, user);
}
}
return mapUserIdToUser;
}
}
But then I get the following error:
Methods are final by default, Use virtual to declare methods that can be overriden
Ideally I'd like to do something as short and sweet as the first line of code I supplied at the top, so really I'm looking at the cleanest way possible to declare a Map<Id, SObject> using the final keyword as once this variable has been supplied with values, it won't change.
Edit
I may be misunderstanding something pretty simple, but given the error I know I could just remove final and write something like below:
private final Map<Id, User> mapUserIdToUser {
get {
if (mapUserIdToUser == null) {
[...]
But would this act as final and disallow any changes to the variable?
