The concept of an owned entity can be easily extended so that the
entity can also be shared with other users.
For this purpose HyperIoT framework provides the
HyperIoTSharedEntity interface. The HyperIoTSharedEntity
interface does not declare any methods (it is a marker interface) and
extends the HyperIoTOwnedResource interface, making shared
entities owned entities as well.
Making a shared entity requires the same effort as is expended to
make an owned entity. The only difference, in fact, lies in the fact
that the entity implements HyperIoTSharedEntity instead of HyperIoTOwnedResource.
Consider the same example seen in the section on owned resources.
You can make the entity Book simply by replacing the
HyperIoTOwnedResource interface with the HyperIoTSharedEntity interface:
@Entity
@Table(uniqueConstraints = { @UniqueConstraint(columnNames = "isbn") })
public class Libro extends HyperIoTAbstractEntity implements HyperIoTProtectedEntity, HyperIoTSharedEntity {
...
}
Similarly, the LibroServiceImpl class needs to implement the
HyperIoTSharingEntityService interface. This interface extends the
HyperIoTOwnershipResourceService interface:
public final class LibroServiceImpl extends HyperIoTBaseEntityServiceImpl<Libro>
implements LibroApi, HyperIoTSharingEntityService {
...
}
The HyperIoT framework provides the HyperIoTSharedEntity
project that allows shared resources to be operated on through
services that allow entities to be shared with other users.
To share an entity with other users requires that the entity belongs
to the owner user and that the owner user has permission to perform
the share action on the entity. The share action is defined within the
HyperIoTShareAction enum within the HyperIoTBase-api module.
