java - How to create user/roles relation in UML class diagram? -

java - How to create user/roles relation in UML class diagram? -

i have few weeks searching how create uml class diagram project.

the scheme manage users , roles of users access , maintain active session after login.

what type of relation can implementate between classes? are class correct? will need other classes?

thanks in advance!

i'll take shot @ this. session object has composition association user. (can't have user without session, can't have session without user.) user has composition association roles. (can't have user without roles, etc.) session constructor creates user object, user constructor creates 1 role object each valid role , puts them in collection/dictionary/array/whatever.

you don't associate role straight subclasses, because every type of user has roles. user exposes valid roles through methods. session accesses valid roles when deciding whether or not allow given activity.

java c++ c uml