Set-relations
Unlike list-relations, objects owned or used by other objects in set-relations are not listed in sequential order, but are grouped in a non-ordered set. They are directly accessible by a key. A set-relation cannot contain two objects associated with the same key.
Rogue Wave® Server supplies two class templates to define set-relations:
IlsOwnsSet<OwnerType,OwnedType,KeyType,KeyManager>;
IlsUsesSet<UserType,UsedType,KeyType,KeyManager>.
These class templates both take the following four arguments:
The owner or user type. This class must derive directly or transitively from
IlsObject or
IlsEntity. Derivation must be public.
The owned or used type. This class must derive directly or transitively from
IlsObject for
IlsOwnsSet and from
IlsObject or
IlsEntity for
IlsUsesSet. Derivation must be public.
A class
KeyType that specifies the key type used to store target objects.
A class
KeyManager that specifies how to handle keys—how to compare them, for example.
Version 5.8
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