GraphMetricReranker

java.lang.Object

es.uam.eps.ir.relison.links.recommendation.reranking.global.local.LocalReranker<U,I>

es.uam.eps.ir.relison.links.recommendation.reranking.global.local.LocalGreedyReranker<U,I>

es.uam.eps.ir.relison.links.recommendation.reranking.global.local.LocalLambdaReranker<U,U>

es.uam.eps.ir.relison.links.recommendation.reranking.global.local.GraphLocalReranker<U>

es.uam.eps.ir.relison.links.recommendation.reranking.global.local.graph.GraphMetricReranker<U>

Type Parameters:: U - type of the users.

All Implemented Interfaces:: GlobalReranker<U,U>

Direct Known Subclasses:: DirectGraphMetricReranker, InverseGraphMetricReranker

public abstract class GraphMetricReranker<U>
extends GraphLocalReranker<U>

Reranker strategy that reorders the candidate users according to a graph metric.

Field Summary

Fields

Modifier and Type Field Description

protected GraphMetric<U> metric
The selected metric

Fields inherited from class es.uam.eps.ir.relison.links.recommendation.reranking.global.local.GraphLocalReranker
graph

Fields inherited from class es.uam.eps.ir.relison.links.recommendation.reranking.global.local.LocalLambdaReranker
novMap, novStats, relStats

Fields inherited from class es.uam.eps.ir.relison.links.recommendation.reranking.global.local.LocalGreedyReranker
cutOff

Constructor Summary

Constructors
Constructor	Description
`GraphMetricReranker(double lambda, int cutoff, java.util.function.Supplier<Normalizer<U>> norm, Graph<U> graph, GraphMetric<U> metric)`	Constructor.

Method Summary

Modifier and Type	Method	Description
`protected void`	`update(U user, org.ranksys.core.util.tuples.Tuple2od<U> bestItemValue)`	Given a user, and the next value to add, updates the reranker parameters.

Methods inherited from class es.uam.eps.ir.relison.links.recommendation.reranking.global.local.GraphLocalReranker

innerUpdate

Methods inherited from class es.uam.eps.ir.relison.links.recommendation.reranking.global.local.LocalLambdaReranker

nov, rerankPermutation, selectItem, value

Methods inherited from class es.uam.eps.ir.relison.links.recommendation.reranking.global.local.LocalGreedyReranker

getBasePerm, rerankRecommendation

Methods inherited from class es.uam.eps.ir.relison.links.recommendation.reranking.global.local.LocalReranker

rerankRecommendations, update

Methods inherited from class java.lang.Object

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

Field Details
- metric
  
  protected final GraphMetric<U> metric
  
  The selected metric
Constructor Details
- GraphMetricReranker
  
  public GraphMetricReranker(double lambda, int cutoff, java.util.function.Supplier<Normalizer<U>> norm, Graph<U> graph, GraphMetric<U> metric)
  
  Constructor.
  
  Parameters:
  
  lambda - trade-off between the original and novelty scores
  
  cutoff - maximum length of the definitive ranking.
  
  norm - the normalization strategy.
  
  graph - the original graph.
  
  metric - the vertex metric to optimize.
Method Details
- update
  
  protected void update(U user, org.ranksys.core.util.tuples.Tuple2od<U> bestItemValue)
  
  Description copied from class: LocalGreedyReranker
  
  Given a user, and the next value to add, updates the reranker parameters.
  
  Overrides:
  
  update in class GraphLocalReranker<U>
  
  Parameters:
  
  user - The user
  
  bestItemValue - The next value to add at the ranking