| The main interface used by clients of index wrappers that are not Name Spaced.
The interface uses similar methods to the Map interface as most cache implementations
can be easily adapted to these methods.
As with the Map classes the metaphors are to add an object use the put method, to retrieve an
object use get(key) and to remove use remove(key).
The additional query method is for clients to query the cache by values other than the key. |