es.uam.eps.ir.ranksys.metrics.rel.NoRelevanceModel Maven / Gradle / Ivy
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RankSys module, providing interfaces and common components for defining metrics.
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/*
* Copyright (C) 2015 Information Retrieval Group at Universidad Autónoma
* de Madrid, http://ir.ii.uam.es
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
package es.uam.eps.ir.ranksys.metrics.rel;
import es.uam.eps.ir.ranksys.metrics.rel.RelevanceModel.UserRelevanceModel;
/**
* Relevance model in which every item is judged as relevant.
*
* @author Saúl Vargas ([email protected])
* @author Pablo Castells ([email protected])
*
* @param type of the users
* @param type of the items
*/
public class NoRelevanceModel extends RelevanceModel {
private final UserNoRelevanceModel rel = new UserNoRelevanceModel();
/**
* Constructor. No need to cache anything here.
*
*/
public NoRelevanceModel() {
super();
}
@Override
protected UserRelevanceModel get(U user) {
return rel;
}
@Override
public UserRelevanceModel getModel(U u) {
return rel;
}
private class UserNoRelevanceModel implements UserRelevanceModel {
@Override
public boolean isRelevant(I item) {
return true;
}
@Override
public double gain(I item) {
return 1.0;
}
}
}