fitnessfunctions

Class PartitionFitnessFunction

java.lang.Object

fitnessfunctions.PartitionFitnessFunction

public class PartitionFitnessFunction
extends java.lang.Object

PartitionFitnessfunction is a class responsible for calculating and aggregating the total cost function associated with a certain ranking. The ranking is represented both as a NetworkPartition for structural penalties and as a normal network for ranking based penalties (i.a. regularization penalty). It supports incremental penalty function updates by requesting recent changes from the PredictionModifierOpt class.

Since:

0.0

Version:

1.0

Author:

Joeri Ruyssinck (joeri.ruysssinck@intec.ugent.be)

Constructor Summary

Constructors

Constructor and Description
PartitionFitnessFunction(java.util.ArrayList<LoggerOrPenaltyDefinition> penalties, NetworkFileBackedWrapper wrapper, PredictionModifierOpt modifier) Constructs a PartitionFitnessFunction with an associated network, modifier and associated penalties.

Method Summary

Modifier and Type	Method and Description
void	clearNetworks() Clears all assigned penalties and coefficients.
void	commit() Commits the changes made by the modifier to all subnetworks.
java.util.ArrayList<PenaltyPair>	getDetailedFitness() Returns the list of pairs consisting of the penalty name and its current fitness score.
long	getFitness() Returns the calculated fitness score of the network ranking.
void	modify() Gets the list of modifications made to the ranking and translates them into subnetwork changes.
void	revert() Reverts the changes made by the modifier to all subnetworks and resets the penaltyfunction scores.

Methods inherited from class java.lang.Object

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

Constructor Detail

PartitionFitnessFunction

public PartitionFitnessFunction(java.util.ArrayList<LoggerOrPenaltyDefinition> penalties,
                                NetworkFileBackedWrapper wrapper,
                                PredictionModifierOpt modifier)

Constructs a PartitionFitnessFunction with an associated network, modifier and associated penalties. Loads and creates penaltyfunction from the definition and assigns them to the correct networks.

Parameters:

penalties - A list of penalty functions to be created and assigned to networks

wrapper - The network represented as a NetworkFileBackedWrapper

modifier - The modifier which will mutate the network. Will be polled for incremental updates of the penalties.

Method Detail

clearNetworks

public void clearNetworks()

Clears all assigned penalties and coefficients.

getFitness

public long getFitness()

Returns the calculated fitness score of the network ranking.

Returns:

the current fitness of the network ranking

commit

public void commit()

Commits the changes made by the modifier to all subnetworks.

revert

public void revert()

Reverts the changes made by the modifier to all subnetworks and resets the penaltyfunction scores.

modify

public void modify()

Gets the list of modifications made to the ranking and translates them into subnetwork changes. Proceeds to calculate the new penaltyscores and aggregates them with the correct coefficients.

getDetailedFitness

public java.util.ArrayList<PenaltyPair> getDetailedFitness()

Returns the list of pairs consisting of the penalty name and its current fitness score.

Returns:

an Arraylist containing all current loaded structural penalties and associated fitness scores