org.lenskit.basic

Class PopularityRankItemScorer

java.lang.Object

org.lenskit.basic.AbstractItemScorer

org.lenskit.basic.PopularityRankItemScorer

All Implemented Interfaces:

Serializable, ItemScorer

@Shareable
public class PopularityRankItemScorer
extends AbstractItemScorer
implements Serializable

Item scorer scores items based on their popularity rank. 1 is the most popular item, and 0 is an unknown item.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
PopularityRankItemScorer(RatingSummary rs)

Method Summary

Modifier and Type	Method and Description
ResultMap	scoreWithDetails(long user, Collection<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

Constructor Detail

PopularityRankItemScorer

@Inject
public PopularityRankItemScorer(RatingSummary rs)

Method Detail

scoreWithDetails

@Nonnull
public ResultMap scoreWithDetails(long user,
                                            @Nonnull
                                            Collection<Long> items)

Description copied from interface: ItemScorer

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

Specified by:

scoreWithDetails in interface ItemScorer

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.