org.lenskit.slopeone

Class SlopeOneItemScorer

java.lang.Object

org.lenskit.basic.AbstractItemScorer

org.lenskit.slopeone.SlopeOneItemScorer

All Implemented Interfaces:

ItemScorer

Direct Known Subclasses:

WeightedSlopeOneItemScorer

public class SlopeOneItemScorer
extends AbstractItemScorer

An ItemScorer that implements the Slope One algorithm.

Field Summary

Fields

Modifier and Type	Field and Description
protected RatingVectorPDAO	dao
protected PreferenceDomain	domain
protected SlopeOneModel	model

Constructor Summary

Constructors

Constructor and Description
SlopeOneItemScorer(RatingVectorPDAO dao, SlopeOneModel model, PreferenceDomain dom)

Method Summary

Modifier and Type	Method and Description
SlopeOneModel	getModel()
ResultMap	scoreWithDetails(long user, java.util.Collection<java.lang.Long> items) Score a collection of items and potentially return more details on the scores.

Methods inherited from class org.lenskit.basic.AbstractItemScorer

score, score

Methods inherited from class java.lang.Object

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

Field Detail

dao

protected final RatingVectorPDAO dao

model

protected SlopeOneModel model

domain

protected final PreferenceDomain domain

Constructor Detail

SlopeOneItemScorer

@Inject
public SlopeOneItemScorer(RatingVectorPDAO dao,
                                  SlopeOneModel model,
                                  @Nullable
                                  PreferenceDomain dom)

Method Detail

scoreWithDetails

@Nonnull
public ResultMap scoreWithDetails(long user,
                                           @Nonnull
                                           java.util.Collection<java.lang.Long> items)

Description copied from interface: ItemScorer

Score a collection of items and potentially return more details on the scores.

Parameters:

user - The user ID for whom to generate scores.

items - The item to score.

Returns:

The scores for the items. This result set may not contain all requested items. Implementations that support additional details will return a subclass of ResultMap that provides access to those details.

getModel

public SlopeOneModel getModel()