es.uam.eps.ir.ranksys.novdiv.reranking

Class RerankingRecommender<U,I>

java.lang.Object

es.uam.eps.ir.ranksys.rec.AbstractRecommender<U,I>

es.uam.eps.ir.ranksys.rec.fast.AbstractFastRecommender<U,I>

es.uam.eps.ir.ranksys.novdiv.reranking.RerankingRecommender<U,I>

Type Parameters:

U - type of the users

I - type of the items

All Implemented Interfaces:

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

public class RerankingRecommender<U,I>
extends AbstractFastRecommender<U,I>

Wrapper for re-ranker that re-ranks the output of another recommender.

Author:

Saúl Vargas (saul.vargas@uam.es)

Field Summary

Fields inherited from class es.uam.eps.ir.ranksys.rec.fast.AbstractFastRecommender

iIndex, uIndex

Constructor Summary

Constructors

Constructor and Description
RerankingRecommender(FastUserIndex<U> uIndex, FastItemIndex<I> iIndex, FastRecommender<U,I> recommender, Reranker<U,I> reranker) Constructor.

Method Summary

Modifier and Type	Method and Description
FastRecommendation	getRecommendation(int uidx, int maxLength, IntPredicate filter) Filter recommendation.
Recommendation<U,I>	getRecommendation(U u, int maxLength, Predicate<I> filter) Filter recommendation.

Methods inherited from class es.uam.eps.ir.ranksys.rec.fast.AbstractFastRecommender

getRecommendation, getRecommendation, getRecommendation, getRecommendation, getRecommendation, getRecommendation, iidx2item, item2iidx, numItems, numUsers, uidx2user, user2uidx

Methods inherited from class es.uam.eps.ir.ranksys.rec.AbstractRecommender

getRecommendation, getRecommendation

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

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

getRecommendation, getRecommendation

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

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

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

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

Constructor Detail

RerankingRecommender

public RerankingRecommender(FastUserIndex<U> uIndex,
                            FastItemIndex<I> iIndex,
                            FastRecommender<U,I> recommender,
                            Reranker<U,I> reranker)

Constructor.

Parameters:

uIndex - user index

iIndex - item index

recommender - input recommender

reranker - re-ranker to apply to input recommender

Method Detail

getRecommendation

public Recommendation<U,I> getRecommendation(U u,
                                             int maxLength,
                                             Predicate<I> filter)

Description copied from interface: Recommender

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

Specified by:

getRecommendation in interface Recommender<U,I>

Overrides:

getRecommendation in class AbstractFastRecommender<U,I>

Parameters:

u - user to be issued a recommendation

maxLength - maximum length of recommendation

filter - filter to decide which items might be recommended

Returns:

a recommendation list

getRecommendation

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

Description copied from interface: FastRecommender

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

Specified by:

getRecommendation in interface FastRecommender<U,I>

Specified by:

getRecommendation in class AbstractFastRecommender<U,I>

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