es.uam.eps.ir.relison.diffusion.selections.PureTimestampBasedSelectionMechanism Maven / Gradle / Ivy
/*
* Copyright (C) 2020 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.relison.diffusion.selections;
import es.uam.eps.ir.relison.diffusion.data.Data;
import es.uam.eps.ir.relison.diffusion.data.PropagatedInformation;
import es.uam.eps.ir.relison.diffusion.simulation.SimulationState;
import es.uam.eps.ir.relison.diffusion.simulation.UserState;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.stream.Collectors;
import java.util.stream.Stream;
/**
* Selection mechanism that takes the real timestamps of the users into account. Each own piece of information
* is released when the timestamp of the piece is equal to the timestamp of the simulation. No information pieces
* are repropagated.
*
* @author Javier Sanz-Cruzado ([email protected])
* @author Pablo Castells ([email protected])
*
* @param type of the users.
* @param type of the information pieces.
* @param type of the parameters.
*/
public class PureTimestampBasedSelectionMechanism extends TimestampBasedSelectionMechanism
{
@Override
protected List getReceivedInformation(UserState user, Data data, SimulationState state, int numIter, Long timestamp)
{
List prop = new ArrayList<>();
U u = user.getUserId();
int uidx = data.getUserIndex().object2idx(user.getUserId());
data.getRealPropPiecesByTimestamp(timestamp, u).forEach(i ->
{
int iidx = data.getInformationPiecesIndex().object2idx(i);
if(user.containsReceivedInformation(iidx))
{
prop.add(new PropagatedInformation(iidx, numIter, uidx));
}
});
return prop;
}
@Override
public Stream getSelectableUsers(Data data, SimulationState state, int numIter, Long timestamp)
{
Set set = data.getUsersByTimestamp(timestamp).collect(Collectors.toCollection(HashSet::new));
data.getRealPropUsersByTimestamp(timestamp).forEach(set::add);
return set.stream();
}
}