org.evosuite.ga

Class ReplacementFunction

java.lang.Object

org.evosuite.ga.ReplacementFunction

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

FitnessReplacementFunction, TestCaseReplacementFunction, TestSuiteReplacementFunction

public abstract class ReplacementFunction
extends Object
implements Serializable

Decides when offspring replaces its parents for the next generation

Author:

Gordon Fraser

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected boolean	maximize

Constructor Summary

Constructors

Constructor and Description
ReplacementFunction(boolean maximize) Constructor for ReplacementFunction.

Method Summary

Modifier and Type	Method and Description
protected int	compareBestOffspringToBestParent(Chromosome parent1, Chromosome parent2, Chromosome offspring1, Chromosome offspring2) Check how the best offspring compares with best parent
protected Chromosome	getBest(Chromosome chromosome1, Chromosome chromosome2) getBest
protected boolean	isBetter(Chromosome chromosome1, Chromosome chromosome2) isBetter
protected boolean	isBetterOrEqual(Chromosome chromosome1, Chromosome chromosome2) isBetterOrEqual
boolean	keepOffspring(Chromosome parent, Chromosome offspring) Deprecated. should not be used, as it does not handle Properties.CHECK_PARENTS_LENGTH
boolean	keepOffspring(Chromosome parent1, Chromosome parent2, Chromosome offspring1, Chromosome offspring2) Decide whether to keep the offspring or the parents

Methods inherited from class java.lang.Object

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

Field Detail

maximize

protected boolean maximize

Constructor Detail

ReplacementFunction

public ReplacementFunction(boolean maximize)

Constructor for ReplacementFunction.

Parameters:

maximize - a boolean.

Method Detail

isBetter

protected boolean isBetter(Chromosome chromosome1,
                           Chromosome chromosome2)

isBetter

Parameters:

chromosome1 - a Chromosome object.

chromosome2 - a Chromosome object.

Returns:

a boolean.

isBetterOrEqual

protected boolean isBetterOrEqual(Chromosome chromosome1,
                                  Chromosome chromosome2)

isBetterOrEqual

Parameters:

chromosome1 - a Chromosome object.

chromosome2 - a Chromosome object.

Returns:

a boolean.

getBest

protected Chromosome getBest(Chromosome chromosome1,
                             Chromosome chromosome2)

getBest

Parameters:

chromosome1 - a Chromosome object.

chromosome2 - a Chromosome object.

Returns:

a Chromosome object.

keepOffspring

public boolean keepOffspring(Chromosome parent1,
                             Chromosome parent2,
                             Chromosome offspring1,
                             Chromosome offspring2)

Decide whether to keep the offspring or the parents

Parameters:

parent1 - a Chromosome object.

parent2 - a Chromosome object.

offspring1 - a Chromosome object.

offspring2 - a Chromosome object.

Returns:

a boolean.

compareBestOffspringToBestParent

protected int compareBestOffspringToBestParent(Chromosome parent1,
                                               Chromosome parent2,
                                               Chromosome offspring1,
                                               Chromosome offspring2)

Check how the best offspring compares with best parent

Parameters:

parent1 - a Chromosome object.

parent2 - a Chromosome object.

offspring1 - a Chromosome object.

offspring2 - a Chromosome object.

Returns:

a int.

keepOffspring

@Deprecated
public boolean keepOffspring(Chromosome parent,
                                         Chromosome offspring)

Deprecated. should not be used, as it does not handle Properties.CHECK_PARENTS_LENGTH

Decide which of two offspring to keep

Parameters:

parent - a Chromosome object.

offspring - a Chromosome object.

Returns:

a boolean.