Package org.moeaframework.core.operator.grammar

Class GrammarCrossover

java.lang.Object

org.moeaframework.core.operator.TypeSafeCrossover<Grammar>

org.moeaframework.core.operator.grammar.GrammarCrossover

All Implemented Interfaces:

Configurable, Variation

public class GrammarCrossover
extends TypeSafeCrossover<Grammar>

Single-point crossover for grammars. A crossover point is selected in both parents with the tail portions swapped.

This variation operator is type-safe.

Constructor Summary

Constructors

Constructor	Description
GrammarCrossover()	Constructs a new grammar crossover operator with 100% probability of being applied to each solution.
GrammarCrossover(double probability)	Constructs a single-point crossover operator for grammars with the specified probability of applying this operator to each grammar variable.

Method Summary

Modifier and Type	Method	Description
void	evolve(Grammar g1, Grammar g2)	Performs single-point crossover on the specified grammars.
String	getName()	Returns the name of this variation operator.

Methods inherited from class org.moeaframework.core.operator.TypeSafeCrossover

evolve, getArity, getProbability, setProbability

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.moeaframework.core.configuration.Configurable

applyConfiguration, getConfiguration

Constructor Details

GrammarCrossover

public GrammarCrossover()

Constructs a new grammar crossover operator with 100% probability of being applied to each solution.

GrammarCrossover

public GrammarCrossover(double probability)

Constructs a single-point crossover operator for grammars with the specified probability of applying this operator to each grammar variable.

Parameters:

probability - the probability of applying this operator to each grammar variable

Method Details

getName

public String getName()

Description copied from interface: Variation

Returns the name of this variation operator. This name should also be used as the prefix for any parameters. As such, the name should only contain alphanumeric characters, avoid using whitespace and other symbols.

Returns:

the name of this variation operator

evolve

public void evolve(Grammar g1,
 Grammar g2)

Performs single-point crossover on the specified grammars. Crossover points are chosen for both parents and the tail sections swapped. The two grammars are modified as a result of this operation.

Specified by:

evolve in class TypeSafeCrossover<Grammar>

Parameters:

g1 - the first grammar

g2 - the second grammar