Bug with list Enum

[Huy Bui]

Enum:
public enum Role {
USER,
ADMINISTRATOR
}

Class:
UserAccount{
@Enumerated(STRING)
private Set< Role > roles;
public Set< Role > getRoles() {
return roles;
}
....
//other properties
}

When save by Respository, then I use as below:

Set< Role > roles = userAccount.getRoles();
for (Role role : roles) {
//todo
}

I get Error at statement: "for (Role role : roles) {"
java.lang.ClassCastException: java.lang.String cannot be cast to <package_name>.Role

[Graham Webber]

This has been fixed by saving the Collection of Enums as a comma separated String in the Graph. So in the example above a String "USER,ADMINISTRATOR" will be saved to the graph if the Set contains both enums.

Also, the Collection declaration must be a concrete type, unless you use the new @EnumeratedCollection annotation where you can specify the concrete type of the Collection. So in the example above, you can change the declaration to:

private HashSet< Role > roles;

// OR

@EnumeratedCollection(HashSet.class)
private Set< Role > roles;