com.planetj.taste.recommender
Interface Rescorer<T>

All Known Implementing Classes:

NullRescorer

public interface Rescorer<T>

A Rescorer simply assigns a new "score" to a thing like an Item or User which a Recommender is considering returning as a top recommendation. It may be used to arbitrarily re-rank the results according to application-specific logic before returning recommendations. For example, an application may want to boost the score of items in a certain category just for one request.

A Rescorer can also exclude a thing from consideration entirely by returning true from isFiltered(Object).

Since:

1.1

Author:

Sean Owen

Method Summary

boolean	isFiltered(T thing)
double	rescore(T thing, double originalScore)

Method Detail

rescore

double rescore(T thing,
               double originalScore)

Parameters:

thing - thing (Item or User really) to rescore

originalScore - original score

Returns:

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

isFiltered

boolean isFiltered(T thing)