es.ucm.fdi.gaia.recolibry.implementations.mahout.cfUser

Class MahoutUserNeighborhood

java.lang.Object

es.ucm.fdi.gaia.recolibry.implementations.mahout.cfUser.MahoutUserNeighborhood

All Implemented Interfaces:

org.apache.mahout.cf.taste.common.Refreshable, org.apache.mahout.cf.taste.neighborhood.UserNeighborhood

public class MahoutUserNeighborhood
extends Object
implements org.apache.mahout.cf.taste.neighborhood.UserNeighborhood

Class to select which neighborhood algorithms use in a RecommenderMahoutCFUser. There are two algorithms to select: NearesN (the n most similar users) and Threshold (users with a similarity value mayor than a threshold).

Version:

1.0

Author:

Jose L. Jorro-Aragoneses

Constructor Summary

Constructors

Constructor and Description
MahoutUserNeighborhood(String type, int n, double threshold, org.apache.mahout.cf.taste.similarity.UserSimilarity similarity, DataModelFactory model) Method to build a Neighborhood algorithm.

Method Summary

Modifier and Type	Method and Description
long[]	getUserNeighborhood(long l)
void	refresh(Collection<org.apache.mahout.cf.taste.common.Refreshable> collection)

Methods inherited from class java.lang.Object

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

Constructor Detail

MahoutUserNeighborhood

@Inject
public MahoutUserNeighborhood(String type,
                                      int n,
                                      @Nullable
                                      double threshold,
                                      org.apache.mahout.cf.taste.similarity.UserSimilarity similarity,
                                      DataModelFactory model)

Method to build a Neighborhood algorithm.

Parameters:

type - select the algorithm type: NearestN or Threshold.

n - number of users to recover. It is used if the algorithm type is NearestN.

threshold - threshold to recover users. It is used if the algorithm type is Threshold.

similarity - similarity function used in the algorithm.

model - data model to apply this algorithm.

Method Detail

getUserNeighborhood

public long[] getUserNeighborhood(long l)
                           throws org.apache.mahout.cf.taste.common.TasteException

Specified by:

getUserNeighborhood in interface org.apache.mahout.cf.taste.neighborhood.UserNeighborhood

Throws:

org.apache.mahout.cf.taste.common.TasteException

refresh

public void refresh(Collection<org.apache.mahout.cf.taste.common.Refreshable> collection)

Specified by:

refresh in interface org.apache.mahout.cf.taste.common.Refreshable