Package org.lenskit.basic

Basic component implementations.

See: Description

Class Summary

Class	Description
AbstractItemBasedItemRecommender	Base class to make it easier to implement ItemBasedItemRecommender.
AbstractItemBasedItemScorer	Base class to make it easier to implement ItemBasedItemScorer.
AbstractItemRecommender	Base class to ease implementation of item recommenders.
AbstractItemScorer	Base class to make item scorers easier to implement.
AbstractRatingPredictor	Base class to make item scorers easier to implement.
ConstantItemScorer	Item scorer that returns a fixed score for all items.
FallbackItemScorer	Item scorer that combines a primary scorer with a baseline.
FallbackItemScorer.DynamicProvider	An item scorer provider for opportunistically creating fallback scorers.
FallbackResult	Result from a FallbackItemScorer.
PopularItemRecommender	Recommend the most popular items.
PopularityRankItemScorer	Item scorer scores items based on their popularity rank.
PrecomputedItemScorer	An item scorer that stores a precomputed map of item scores.
PrecomputedItemScorer.Builder	Builder for mock item scorers.
RescoringItemRecommender	Item recommender that wraps a base item recommender and replaces its scores with those produced by another item scorer.
SimpleCachingItemScorer	A simple cached item scorer that remembers the result for the last user id it scored.
SimpleRatingPredictor	Basic rating predictor that uses scores, clamped to valid rating values if appropriate.
TopNItemBasedItemRecommender	A global item recommender that recommends the top N items from a scorer.
TopNItemRecommender	Recommender that recommends the top N items by a scorer.

Annotation Types Summary

Annotation Type	Description
ConstantItemScorer.Value	The value used by the constant scorer.
PredictionScorer	Qualifier for item scorer used to produce rating predictions by SimpleRatingPredictor.
PrimaryScorer	The primary scorer for a FallbackItemScorer.

Package org.lenskit.basic Description

Basic component implementations. Most of these won’t do any good without another, more sophisticated implementation of some component backing them.