Package org.moeaframework.core.comparator

Class LinearObjectiveComparator

java.lang.Object

org.moeaframework.core.comparator.AbstractAggregateObjectiveComparator

org.moeaframework.core.comparator.LinearObjectiveComparator

All Implemented Interfaces:

Comparator<Solution>, AggregateObjectiveComparator, DominanceComparator

public class LinearObjectiveComparator
extends AbstractAggregateObjectiveComparator

The weighted linear aggregate function. By default, this method assumes equal weights for all objectives.

Field Summary

Fields inherited from class org.moeaframework.core.comparator.AbstractAggregateObjectiveComparator

weights

Constructor Summary

Constructors

Constructor	Description
LinearObjectiveComparator(double... weights)	Constructs a new comparator using a weighted linear aggregate function.

Method Summary

Modifier and Type	Method	Description
double	calculate(Solution solution)	Calculates the aggregate value of the solution using this aggregate function.
static final double	calculate(Solution solution, double[] weights)	Computes the weighted linear aggregate vaalue of the solution.

Methods inherited from class org.moeaframework.core.comparator.AbstractAggregateObjectiveComparator

compare, getWeights

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, reversed, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

Constructor Details

LinearObjectiveComparator

public LinearObjectiveComparator(double... weights)

Constructs a new comparator using a weighted linear aggregate function.

Parameters:

weights - the weight vector

Method Details

calculate

public double calculate(Solution solution)

Description copied from interface: AggregateObjectiveComparator

Calculates the aggregate value of the solution using this aggregate function.

Parameters:

solution - the solution

Returns:

the aggregate value (smaller is better)

calculate

public static final double calculate(Solution solution,
 double[] weights)

Computes the weighted linear aggregate vaalue of the solution. One weight should be given for each objective; if fewer weights are provided, the last weight is repeated for the remaining objectives.

Parameters:

solution - the solution

weights - the weight vector

Returns:

the fitness, where smaller values are preferred