jmetal.util.comparators
Class ViolationThresholdComparator

java.lang.Object
  jmetal.util.comparators.ViolationThresholdComparator

All Implemented Interfaces:

java.util.Comparator, IConstraintViolationComparator

public class ViolationThresholdComparator
extends java.lang.Object
implements IConstraintViolationComparator

Constructor Summary

ViolationThresholdComparator()

Method Summary

int	compare(java.lang.Object o1, java.lang.Object o2) Compares two solutions.
double	feasibilityRatio(SolutionSet solutionSet) Computes the feasibility ratio Return the ratio of feasible solutions
double	meanOveralViolation(SolutionSet solutionSet) Computes the feasibility ratio Return the ratio of feasible solutions
boolean	needToCompare(Solution o1, Solution o2) Returns true if solutions s1 and/or s2 have an overall constraint violation < 0
void	updateThreshold(SolutionSet set) Updates the threshold value using the population

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Comparator

equals

Constructor Detail

ViolationThresholdComparator

public ViolationThresholdComparator()

Method Detail

compare

public int compare(java.lang.Object o1,
                   java.lang.Object o2)

Compares two solutions.

Specified by:

compare in interface java.util.Comparator

Specified by:

compare in interface IConstraintViolationComparator

Parameters:

o1 - Object representing the first Solution.

o2 - Object representing the second Solution.

Returns:

-1, or 0, or 1 if o1 is less than, equal, or greater than o2, respectively.

needToCompare

public boolean needToCompare(Solution o1,
                             Solution o2)

Returns true if solutions s1 and/or s2 have an overall constraint violation < 0

Specified by:

needToCompare in interface IConstraintViolationComparator

feasibilityRatio

public double feasibilityRatio(SolutionSet solutionSet)

Computes the feasibility ratio Return the ratio of feasible solutions

meanOveralViolation

public double meanOveralViolation(SolutionSet solutionSet)

Computes the feasibility ratio Return the ratio of feasible solutions

updateThreshold

public void updateThreshold(SolutionSet set)

Updates the threshold value using the population