es.uam.eps.ir.ranksys.core.index

Interface UserIndex<U>

Type Parameters:

U - type of the users

All Known Subinterfaces:

FastPointWisePreferenceData<U,I>, FastPreferenceData<U,I>, FastPreferenceSampler<U,I>, FastRecommender<U,I>, FastUserIndex<U>, PointWisePreferenceData<U,I>, PreferenceData<U,I>, PreferenceSampler<U,I>

All Known Implementing Classes:

AbstractCODECPreferenceData, AbstractFastPreferenceData, AbstractFastPreferenceSampler, AbstractFastRecommender, BinaryCODECPreferenceData, CachedUserNeighborhood, ConcatPreferenceData, Factorization, FastEnsembleRecommender, FastRankingRecommender, FMRecommender, InvertedUserNeighborhood, ItemNeighborhoodRecommender, IteratorsAbstractFastPreferenceData, LDARecommender, MFRecommender, PopularityRecommender, PreferenceFM, RandomRecommender, RatingCODECPreferenceData, RerankingRecommender, SetCosineUserSimilarity, SetJaccardUserSimilarity, SimpleFastPreferenceData, SimpleFastUserIndex, SimplePreferenceData, StreamsAbstractFastPreferenceData, ThresholdUserNeighborhood, TopKUserNeighborhood, TransposedPreferenceData, UserNeighborhood, UserNeighborhoodRecommender, UserSimilarity, VectorCosineUserSimilarity, VectorJaccardUserSimilarity

public interface UserIndex<U>

Index for a set of users.

Author:

Saúl Vargas (saul.vargas@uam.es)

Method Summary

Modifier and Type	Method and Description
boolean	containsUser(U u) Checks whether the index contains a user.
Stream<U>	getAllUsers() Retrieves a stream of the indexed users.
int	numUsers() Counts the number of indexed users.

Method Detail

containsUser

boolean containsUser(U u)

Checks whether the index contains a user.

Parameters:

u - user

Returns:

true if the index contains the user, false otherwise

numUsers

int numUsers()

Counts the number of indexed users.

Returns:

the total number of users

getAllUsers

Stream<U> getAllUsers()

Retrieves a stream of the indexed users.

Returns:

a stream of all the users