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

Class MahoutUserSimilarity

java.lang.Object

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

All Implemented Interfaces:

org.apache.mahout.cf.taste.common.Refreshable, org.apache.mahout.cf.taste.similarity.UserSimilarity

public class MahoutUserSimilarity
extends Object
implements org.apache.mahout.cf.taste.similarity.UserSimilarity

Class to select the similarity function to apply in the RecommenderMahoutCFUser. There are 7 functions to select: CityBlock, Euclidean, LogLike, Pearson, Spearman, Tanimoto nad UncenteredCosine.

Version:

1.0

Author:

Jose L. Jorro-Aragoneses

Constructor Summary

Constructors

Constructor and Description
MahoutUserSimilarity(String type, DataModelFactory dataModel) Method to build the similarity function.

Method Summary

Modifier and Type	Method and Description
void	refresh(Collection<org.apache.mahout.cf.taste.common.Refreshable> collection)
void	setPreferenceInferrer(org.apache.mahout.cf.taste.similarity.PreferenceInferrer preferenceInferrer)
double	userSimilarity(long l, long l1)

Methods inherited from class java.lang.Object

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

Constructor Detail

MahoutUserSimilarity

@Inject
public MahoutUserSimilarity(String type,
                                    DataModelFactory dataModel)

Method to build the similarity function.

Parameters:

type - type of similarity function selected.

dataModel - data model where is applied this similarity function.

Method Detail

userSimilarity

public double userSimilarity(long l,
                             long l1)
                      throws org.apache.mahout.cf.taste.common.TasteException

Specified by:

userSimilarity in interface org.apache.mahout.cf.taste.similarity.UserSimilarity

Throws:

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

setPreferenceInferrer

public void setPreferenceInferrer(org.apache.mahout.cf.taste.similarity.PreferenceInferrer preferenceInferrer)

Specified by:

setPreferenceInferrer in interface org.apache.mahout.cf.taste.similarity.UserSimilarity

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