es.uam.eps.ir.ranksys.rec.fast

Interface FastRecommender<U,I>

Type Parameters:

U - type of the users

I - type of the items

All Superinterfaces:

FastItemIndex<I>, FastUserIndex<U>, ItemIndex<I>, Recommender<U,I>, UserIndex<U>

All Known Implementing Classes:

AbstractFastRecommender, FastEnsembleRecommender, FastRankingRecommender, PopularityRecommender, RandomRecommender

public interface FastRecommender<U,I>
extends Recommender<U,I>, FastUserIndex<U>, FastItemIndex<I>

Fast recommender. A version that uses the functionalities of RankSys-fast, so it works only with user and item integer indexes.

Author:

Saúl Vargas (saul.vargas@uam.es)

Method Summary

Modifier and Type	Method and Description
FastRecommendation	getRecommendation(int uidx) Free recommendation.
FastRecommendation	getRecommendation(int uidx, int maxLength) Free recommendation.
FastRecommendation	getRecommendation(int uidx, int maxLength, IntPredicate filter) Filter recommendation.
FastRecommendation	getRecommendation(int uidx, IntPredicate filter) Filter recommendation.
FastRecommendation	getRecommendation(int uidx, IntStream candidates) Candidates ranking.

Methods inherited from interface es.uam.eps.ir.ranksys.rec.Recommender

getRecommendation, getRecommendation, getRecommendation, getRecommendation, getRecommendation

Methods inherited from interface es.uam.eps.ir.ranksys.fast.index.FastUserIndex

containsUser, getAllUidx, getAllUsers, uidx2user, uidx2user, uidx2user, user2uidx, user2uidx, user2uidx

Methods inherited from interface es.uam.eps.ir.ranksys.core.index.UserIndex

numUsers

Methods inherited from interface es.uam.eps.ir.ranksys.fast.index.FastItemIndex

containsItem, getAllIidx, getAllItems, iidx2item, iidx2item, iidx2item, item2iidx, item2iidx, item2iidx

Methods inherited from interface es.uam.eps.ir.ranksys.core.index.ItemIndex

numItems

Method Detail

getRecommendation

FastRecommendation getRecommendation(int uidx)

Free recommendation. Generate recommendations without any restriction on the items being recommended.

Parameters:

uidx - index of the user to be issued a recommendation

Returns:

a (fast) recommendation list

getRecommendation

FastRecommendation getRecommendation(int uidx,
                                     int maxLength)

Free recommendation. Generate recommendations without any restriction on the items being recommended, but with a limit on the list size.

Parameters:

uidx - index of the user to be issued a recommendation

maxLength - maximum length of recommendation

Returns:

a (fast) recommendation list

getRecommendation

FastRecommendation getRecommendation(int uidx,
                                     IntPredicate filter)

Filter recommendation. Recommends only the items that pass the filter.

Parameters:

uidx - index of the user to be issued a recommendation

filter - (fast) filter to decide which items might be recommended

Returns:

a (fast) recommendation list

getRecommendation

FastRecommendation getRecommendation(int uidx,
                                     int maxLength,
                                     IntPredicate filter)

Filter recommendation. Recommends only the items that pass the filter up to a maximum list size.

Parameters:

uidx - index of the user to be issued a recommendation

maxLength - maximum length of recommendation

filter - (fast) filter to decide which items might be recommended

Returns:

a (fast) recommendation list

getRecommendation

FastRecommendation getRecommendation(int uidx,
                                     IntStream candidates)

Candidates ranking. Create a list that may contain only the items in the candidates set.

Parameters:

uidx - item of the user to be issued a recommendation

candidates - candidate items to be included in the recommendation

Returns:

a recommendation list