org.ranksys.lda

Class LDARecommender<U,I>

java.lang.Object

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

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

org.ranksys.lda.LDARecommender<U,I>

Type Parameters:

U - user type

I - item type

All Implemented Interfaces:

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

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

LDA recommender. See ParallelTopicModel in Mallet (http://mallet.cs.umass.edu/) for more details.

Author:

Saúl Vargas (Saul.Vargas@glasgow.ac.uk)

Field Summary

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

iIndex, uIndex

Constructor Summary

Constructors

Constructor and Description
LDARecommender(FastUserIndex<U> uIndex, FastItemIndex<I> iIndex, cc.mallet.topics.ParallelTopicModel topicModel) Constructor

Method Summary

Modifier and Type	Method and Description
FastRecommendation	getRecommendation(int uidx, int maxLength, IntPredicate filter) Filter recommendation.

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

getRecommendation, 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

LDARecommender

public LDARecommender(FastUserIndex<U> uIndex,
                      FastItemIndex<I> iIndex,
                      cc.mallet.topics.ParallelTopicModel topicModel)

Constructor

Parameters:

uIndex - user index

iIndex - item index

topicModel - LDA topic model

Method Detail

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