Package org.moeaframework.core.comparator

Class LinearDominanceComparator

java.lang.Object

org.moeaframework.core.comparator.ChainedComparator

org.moeaframework.core.comparator.LinearDominanceComparator

All Implemented Interfaces:

Comparator<Solution>, AggregateObjectiveComparator, DominanceComparator

public class LinearDominanceComparator
extends ChainedComparator
implements AggregateObjectiveComparator

Version of the weighted linear aggregate function that supports constraints.

See Also:

• AggregateConstraintComparator
• LinearObjectiveComparator

Field Summary

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

comparators

Constructor Summary

Constructors

Constructor	Description
LinearDominanceComparator(double... weights)	Constructs a new dominance comparator using a weighted linear aggregate function and constraints.

Method Summary

Modifier and Type	Method	Description
double	calculate(Solution solution)	Calculates the aggregate value of the solution using this aggregate function.
double[]	getWeights()	Returns the weights used by this aggregate function.

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

compare

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

compare, equals, reversed, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

Methods inherited from interface org.moeaframework.core.comparator.DominanceComparator

compare

Constructor Details

LinearDominanceComparator

public LinearDominanceComparator(double... weights)

Constructs a new dominance comparator using a weighted linear aggregate function and constraints. One weight should be given for each objective; if fewer weights are provided, the last weight is repeated for the remaining objectives. Defaults to weights of 1.0 if none are provided.

Parameters:

weights - the weight vector

Method Details

getWeights

public double[] getWeights()

Description copied from interface: AggregateObjectiveComparator

Returns the weights used by this aggregate function.

Specified by:

getWeights in interface AggregateObjectiveComparator

Returns:

the weights

calculate

public double calculate(Solution solution)

Description copied from interface: AggregateObjectiveComparator

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

Specified by:

calculate in interface AggregateObjectiveComparator

Parameters:

solution - the solution

Returns:

the aggregate value (smaller is better)