Here is a set of interfaces that would allow reading partial data from the AIDA Store.
AIDA object would now have to manage its own data - retrieve missing data from the Store when needed, allow data parts that are not currently in use to be Garbage-Collected, backup temporary data to the Store.
public interface IPartialDataStore extends OnDemandStore {
/**
* To be used with any simple AIDA object that has no
* internal structure, like: ICloud, IDataPointSet, IHstogram
*/
IPatialData partialData(Object aidaObject, int row);
/**
* To be used with AIDA objects that has internal structure,
* like: ITuple
*/
IComplexPatialData complexPartialData(Object aidaObject, String pathInObject, int[] rows);
}
public interface IPatialData {
int startIndex();
int endIndex();
String type();
Object data();
}
public interface IComplexPatialData {
int[] startIndices();
int[] endIndices();
String pathInObject();
String type();
Object data();
}
Main problem with this approach is that AIDA object that requested the partial data does not know what is it getting back - it would need to cast generic Object to something specific, like ICloud, double[], etc.