org.apache.mahout.cf.taste.recommender

Interface IDRescorer

All Known Implementing Classes:

NullRescorer

public interface IDRescorer

A Rescorer which operates on long primitive IDs, rather than arbitrary Objects. This is provided since most uses of this interface in the framework take IDs (as long) as an argument, and so this can be used to avoid unnecessary boxing/unboxing.

Method Summary

Modifier and Type	Method and Description
boolean	isFiltered(long id) Returns true to exclude the given thing.
double	rescore(long id, double originalScore)

Method Detail

rescore

double rescore(long id,
               double originalScore)

Parameters:

id - ID of thing (user, item, etc.) to rescore

originalScore - original score

Returns:

modified score, or Double.NaN to indicate that this should be excluded entirely

isFiltered

boolean isFiltered(long id)

Returns true to exclude the given thing.

Parameters:

id - ID of thing (user, item, etc.) to rescore

Returns:

true to exclude, false otherwise