org.eclipse.viatra.dse.objectives.impl

Class TrajectoryCostSoftObjective

java.lang.Object

org.eclipse.viatra.dse.objectives.impl.BaseObjective

org.eclipse.viatra.dse.objectives.impl.TrajectoryCostSoftObjective

All Implemented Interfaces:

IObjective

public class TrajectoryCostSoftObjective
extends BaseObjective

This soft objective calculates a fitness value based on the length of the trajectory. Costs to the rules can be assigned.

Field Summary

Fields

Modifier and Type	Field and Description
protected java.util.Map<BatchTransformationRule<?,?>,ActivationFitnessProcessor>	activationCostProcessors
protected boolean	calculateTrajectoryLengthWeight
static java.lang.String	DEFAULT_NAME
protected java.util.Map<BatchTransformationRule<?,?>,java.lang.Double>	fixCosts
protected double	trajectoryLengthWeight

Fields inherited from class org.eclipse.viatra.dse.objectives.impl.BaseObjective

comparator, fitnessConstraint, fitnessConstraintComparator, isThereFitnessConstraint, level, name

Constructor Summary

Constructors

Constructor and Description
TrajectoryCostSoftObjective()
TrajectoryCostSoftObjective(java.lang.String name)

Method Summary

Modifier and Type	Method and Description
IObjective	createNew() Returns an instance of the IObjective.
java.lang.Double	getFitness(ThreadContext context) Calculates the value of the objective on a given solution (trajectory).
void	init(ThreadContext context) Initializes the objective.
TrajectoryCostSoftObjective	withActivationCost(BatchTransformationRule<?,?> rule, ActivationFitnessProcessor activationCostProcessor) Sets an activation processor for a rule.
TrajectoryCostSoftObjective	withRuleCost(BatchTransformationRule<?,?> rule, double cost) Sets the cost of a rule.
TrajectoryCostSoftObjective	withTrajectoryLengthWeight(double trajectoryLengthWeight) The length of the trajectory multiplied with given parameter will be added to the fitness value.

Methods inherited from class org.eclipse.viatra.dse.objectives.impl.BaseObjective

equals, getComparator, getLevel, getName, hashCode, isHardObjective, satisifiesHardObjective, setComparator, setLevel, toString, withComparator, withHardConstraintOnFitness, withHardConstraintOnFitness, withLevel

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

DEFAULT_NAME

public static final java.lang.String DEFAULT_NAME

See Also:

Constant Field Values

fixCosts

protected java.util.Map<BatchTransformationRule<?,?>,java.lang.Double> fixCosts

activationCostProcessors

protected java.util.Map<BatchTransformationRule<?,?>,ActivationFitnessProcessor> activationCostProcessors

trajectoryLengthWeight

protected double trajectoryLengthWeight

calculateTrajectoryLengthWeight

protected boolean calculateTrajectoryLengthWeight

Constructor Detail

TrajectoryCostSoftObjective

public TrajectoryCostSoftObjective(java.lang.String name)

TrajectoryCostSoftObjective

public TrajectoryCostSoftObjective()

Method Detail

withRuleCost

public TrajectoryCostSoftObjective withRuleCost(BatchTransformationRule<?,?> rule,
                                                double cost)

Sets the cost of a rule.

Parameters:

rule -

cost -

Returns:

The actual instance to enable builder pattern like usage.

withActivationCost

public TrajectoryCostSoftObjective withActivationCost(BatchTransformationRule<?,?> rule,
                                                      ActivationFitnessProcessor activationCostProcessor)

Sets an activation processor for a rule.

Parameters:

rule -

activationCostProcessor -

Returns:

The actual instance to enable builder pattern like usage.

withTrajectoryLengthWeight

public TrajectoryCostSoftObjective withTrajectoryLengthWeight(double trajectoryLengthWeight)

The length of the trajectory multiplied with given parameter will be added to the fitness value.

Parameters:

trajectoryLengthWeight - The weight of a transformation rule application.

Returns:

The actual instance to enable builder pattern like usage.

getFitness

public java.lang.Double getFitness(ThreadContext context)

Description copied from interface: IObjective

Calculates the value of the objective on a given solution (trajectory).

Parameters:

context - The ThreadContext

Returns:

The objective value in double.

init

public void init(ThreadContext context)

Description copied from interface: IObjective

Initializes the objective. It is called exactly once for every thread starts.

Specified by:

init in interface IObjective

Overrides:

init in class BaseObjective

Parameters:

context - The ThreadContext.

createNew

public IObjective createNew()

Description copied from interface: IObjective

Returns an instance of the IObjective. If it returns the same instance, all the methods has to be thread save as they are called concurrently.

Returns:

An instance of the objective.