You must retrieve it using world instance.
A entity can be assigned to more than one group.
@author Arni ArentFacade class for storing, retrieving and managing wiki groups on behalf of AuthorizationManager, JSPs and other presentation-layer classes. GroupManager works in collaboration with a back-end {@link GroupDatabase}, which persists groups to permanent storage.
Note: prior to JSPWiki 2.4.19, GroupManager was an interface; it is now a concrete, final class. The aspects of GroupManager which previously extracted group information from storage (e.g., wiki pages) have been refactored into the GroupDatabase interface.
@author Andrew Jaquith @since 2.4.19Describes the service interface for managing groups.
Group hierarchy elements are being returned as a {@link Group}collection. The backing implementation must appropriately map the group hierarchy to a preferences sub-tree.
The convention {principal}.{subprincipal} has been chosen to name groups hierachies. Implementation follow the conventions enforced by the Preferences API.
@author David Le StratFacade class for storing, retrieving and managing wiki groups on behalf of AuthorizationManager, JSPs and other presentation-layer classes. GroupManager works in collaboration with a back-end {@link GroupDatabase}, which persists groups to permanent storage.
Note: prior to JSPWiki 2.4.19, GroupManager was an interface; it is now a concrete, final class. The aspects of GroupManager which previously extracted group information from storage (e.g., wiki pages) have been refactored into the GroupDatabase interface.
@since 2.4.19
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