Package es.uam.eps.ir.relison.links.recommendation.algorithms.standalone.bipartite

Class BipartiteRecommender<U>

java.lang.Object
es.uam.eps.ir.ranksys.rec.AbstractRecommender<U,​I>
es.uam.eps.ir.ranksys.rec.fast.AbstractFastRecommender<U,​I>
es.uam.eps.ir.ranksys.rec.fast.FastRankingRecommender<U,​U>
es.uam.eps.ir.relison.links.recommendation.UserFastRankingRecommender<U>
es.uam.eps.ir.relison.links.recommendation.algorithms.standalone.bipartite.BipartiteRecommender<U>
Type Parameters:
U - type of the users.
All Implemented Interfaces:
es.uam.eps.ir.ranksys.core.index.ItemIndex<U>, es.uam.eps.ir.ranksys.core.index.UserIndex<U>, es.uam.eps.ir.ranksys.fast.index.FastItemIndex<U>, es.uam.eps.ir.ranksys.fast.index.FastUserIndex<U>, es.uam.eps.ir.ranksys.rec.fast.FastRecommender<U,​U>, es.uam.eps.ir.ranksys.rec.Recommender<U,​U>
Direct Known Subclasses:
AverageCosineSimilarity, CentroidCosineSimilarity, HITS, MaximumCosineSimilarity, PersonalizedHITS, PersonalizedSALSA
public abstract class BipartiteRecommender<U>
extends UserFastRankingRecommender<U>
Abstract class which represents a bipartite recommender. In those recommenders, there are two types of users: authorities and hubs. Hubs only have outgoing links, and authorities only have incoming links.

  • Field Summary

    Fields 
    Modifier and Type Field Description
    protected java.util.Map<java.lang.Long,​U> authorities
    A map between the authorities identifiers and their true representation (the node in the original graph).
    protected DirectedGraph<java.lang.Long> bipartiteGraph
    The bipartite representation of the graph.
    protected java.util.Map<java.lang.Long,​U> hubs
    A map between the hubs identifiers and their true representation (the node in the original graph).
    protected boolean mode
    Execution mode: true if we want to recommend authorities, false if not.

    Fields inherited from class es.uam.eps.ir.relison.links.recommendation.UserFastRankingRecommender

    graph

    Fields inherited from class es.uam.eps.ir.ranksys.rec.fast.AbstractFastRecommender

    iIndex, uIndex

  • Constructor Summary

    Constructors 
    Constructor Description
    BipartiteRecommender​(FastGraph<U> graph, boolean mode)
    Constructor.

  • Method Summary

    Modifier and Type Method Description
    private DirectedGraph<java.lang.Long> computeBipartiteGraph()
    Computes the bipartite graph from the original network.

    Methods inherited from class es.uam.eps.ir.relison.links.recommendation.UserFastRankingRecommender

    getFreq, getFreq, getGraph

    Methods inherited from class es.uam.eps.ir.ranksys.rec.fast.FastRankingRecommender

    getRecommendation, getScoresMap

    Methods inherited from class es.uam.eps.ir.ranksys.rec.fast.AbstractFastRecommender

    getRecommendation, getRecommendation, getRecommendation, getRecommendation, getRecommendation, getRecommendation, getRecommendation, iidx2item, item2iidx, numItems, numUsers, uidx2user, user2uidx

    Methods inherited from class es.uam.eps.ir.ranksys.rec.AbstractRecommender

    getRecommendation, getRecommendation

    Methods inherited from class java.lang.Object

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

    Methods inherited from interface es.uam.eps.ir.ranksys.fast.index.FastItemIndex

    containsItem, getAllIidx, getAllItems, iidx2item, iidx2item, item2iidx, item2iidx

    Methods inherited from interface es.uam.eps.ir.ranksys.fast.index.FastUserIndex

    containsUser, getAllUidx, getAllUsers, uidx2user, uidx2user, user2uidx, user2uidx

    Methods inherited from interface es.uam.eps.ir.ranksys.rec.Recommender

    getRecommendation, getRecommendation

  • Field Details

    • mode

      protected final boolean mode
      Execution mode: true if we want to recommend authorities, false if not.

    • hubs

      protected final java.util.Map<java.lang.Long,​U> hubs
      A map between the hubs identifiers and their true representation (the node in the original graph).

    • authorities

      protected final java.util.Map<java.lang.Long,​U> authorities
      A map between the authorities identifiers and their true representation (the node in the original graph).

    • bipartiteGraph

      protected final DirectedGraph<java.lang.Long> bipartiteGraph
      The bipartite representation of the graph.

  • Constructor Details

    • BipartiteRecommender

      public BipartiteRecommender​(FastGraph<U> graph, boolean mode)
      Constructor.
      Parameters:
      graph - the graph.
      mode - true if we want to recommend authorities, false if we want to recommmend hubs.

  • Method Details

    • computeBipartiteGraph

      private DirectedGraph<java.lang.Long> computeBipartiteGraph()
      Computes the bipartite graph from the original network.
      Returns:
      the bipartite graph.