How to implement CompositeMap class structure in java which is available in the Jakarta Apache Commons Collections?
DataMap is a class structure that maps a single key to multiple values.
I'm supposed to design a class structure called JoinMap which keeps a pair of keys of two DataMaps.
As far as I understood, a JoinMap is meant to join data from two DataMaps into a single view. It somehow reminds of the CompositeMap class structure available in the Jakarta Apache Commons Collections.
Any idea how I should implement this ? Does anyone know how a CompositeMap actually works? Any idea would be appreciated. Thanks.