es.uam.eps.ir.ranksys.rec

Class AbstractRecommender<U,I>

java.lang.Object

es.uam.eps.ir.ranksys.rec.AbstractRecommender<U,I>

Type Parameters:

U - type of the users

I - type of the items

All Implemented Interfaces:

Recommender<U,I>

Direct Known Subclasses:

AbstractFastRecommender

public abstract class AbstractRecommender<U,I>
extends Object
implements Recommender<U,I>

Abstract recommender. It implements the free and candidate-based recommendation methods as variants of the filter recommendation.

Author:

Saúl Vargas (saul.vargas@uam.es)

Constructor Summary

Constructors

Constructor and Description
AbstractRecommender()

Method Summary

Modifier and Type	Method and Description
Recommendation<U,I>	getRecommendation(U u) Free recommendation.
Recommendation<U,I>	getRecommendation(U u, int maxLength) Free recommendation.
abstract Recommendation<U,I>	getRecommendation(U u, int maxLength, Predicate<I> filter) Filter recommendation.
Recommendation<U,I>	getRecommendation(U u, Predicate<I> filter) Filter recommendation.
Recommendation<U,I>	getRecommendation(U u, Stream<I> candidates) Candidates ranking.

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractRecommender

public AbstractRecommender()

Method Detail

getRecommendation

public Recommendation<U,I> getRecommendation(U u)

Description copied from interface: Recommender

Free recommendation. Generate recommendations without any restriction on the items being recommended.

Specified by:

getRecommendation in interface Recommender<U,I>

Parameters:

u - user to be issued a recommendation

Returns:

a recommendation list

getRecommendation

public Recommendation<U,I> getRecommendation(U u,
                                             int maxLength)

Description copied from interface: Recommender

Free recommendation. Generate recommendations without any restriction on the items being recommended, but with a limit on the list size.

Specified by:

getRecommendation in interface Recommender<U,I>

Parameters:

u - user to be issued a recommendation

maxLength - maximum length of recommendation

Returns:

a recommendation list

getRecommendation

public Recommendation<U,I> getRecommendation(U u,
                                             Predicate<I> filter)

Description copied from interface: Recommender

Filter recommendation. Recommends only the items that pass the filter.

Specified by:

getRecommendation in interface Recommender<U,I>

Parameters:

u - user to be issued a recommendation

filter - filter to decide which items might be recommended

Returns:

a recommendation list

getRecommendation

public abstract Recommendation<U,I> getRecommendation(U u,
                                                      int maxLength,
                                                      Predicate<I> filter)

Description copied from interface: Recommender

Filter recommendation. Recommends only the items that pass the filter up to a maximum list size.

Specified by:

getRecommendation in interface Recommender<U,I>

Parameters:

u - user to be issued a recommendation

maxLength - maximum length of recommendation

filter - filter to decide which items might be recommended

Returns:

a recommendation list

getRecommendation

public Recommendation<U,I> getRecommendation(U u,
                                             Stream<I> candidates)

Description copied from interface: Recommender

Candidates ranking. Create a list that may contain only the items in the candidates set.

Specified by:

getRecommendation in interface Recommender<U,I>

Parameters:

u - user to be issued a recommendation

candidates - candidate items to be included in the recommendation

Returns:

a recommendation list