org.moeaframework.core.comparator
Class FitnessComparator

java.lang.Object
  org.moeaframework.core.comparator.FitnessComparator

All Implemented Interfaces:

Serializable, Comparator<Solution>, DominanceComparator

public class FitnessComparator
extends Object
implements DominanceComparator, Comparator<Solution>, Serializable

Compares two solutions based on their FITNESS_ATTRIBUTE value.

See Also:

FitnessEvaluator, Serialized Form

Constructor Summary

FitnessComparator()
Deprecated. Use FitnessComparator(boolean) instead; this method will be removed in a future version

FitnessComparator(boolean largerValuesPreferred)
Constructs a dominance comparator for comparing solutions based on their FITNESS_ATTRIBUTE value.

Method Summary

int	compare(Solution solution1, Solution solution2) Compares the two solutions using a dominance relation, returning -1 if solution1 dominates solution2, 1 if solution2 dominates solution1, and 0 if the solutions are non-dominated.

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

FitnessComparator

@Deprecated
public FitnessComparator()

Deprecated. Use FitnessComparator(boolean) instead; this method will be removed in a future version

Constructs a dominance comparator for comparing solutions based on their FITNESS_ATTRIBUTE value. By default, smaller fitness values are preferred.

FitnessComparator

public FitnessComparator(boolean largerValuesPreferred)

Constructs a dominance comparator for comparing solutions based on their FITNESS_ATTRIBUTE value.

Parameters:

largerValuesPreferred - true if larger fitness values are preferred; otherwise smaller fitness values are preferred

Method Detail

compare

public int compare(Solution solution1,
                   Solution solution2)

Description copied from interface: DominanceComparator

Compares the two solutions using a dominance relation, returning -1 if solution1 dominates solution2, 1 if solution2 dominates solution1, and 0 if the solutions are non-dominated.

Specified by:

compare in interface Comparator<Solution>

Specified by:

compare in interface DominanceComparator

Parameters:

solution1 - the first solution

solution2 - the second solution

Returns:

-1 if solution1 dominates solution2, 1 if solution2 dominates solution1, and 0 if the solutions are non-dominated