1 package net.bmahe.genetics4j.gp.selection;
2
3 import java.util.Objects;
4 import java.util.random.RandomGenerator;
5
6 import org.apache.commons.lang3.Validate;
7
8 import net.bmahe.genetics4j.core.selection.SelectionPolicyHandler;
9 import net.bmahe.genetics4j.core.selection.SelectionPolicyHandlerResolver;
10 import net.bmahe.genetics4j.core.selection.Selector;
11 import net.bmahe.genetics4j.core.spec.AbstractEAConfiguration;
12 import net.bmahe.genetics4j.core.spec.AbstractEAExecutionContext;
13 import net.bmahe.genetics4j.core.spec.selection.SelectionPolicy;
14 import net.bmahe.genetics4j.gp.spec.selection.DoubleTournament;
15
16 public class DoubleTournamentSelectionPolicyHandler<T extends Comparable<T>> implements SelectionPolicyHandler<T> {
17 private final RandomGenerator randomGenerator;
18
19 public DoubleTournamentSelectionPolicyHandler(final RandomGenerator _randomGenerator) {
20 Objects.requireNonNull(_randomGenerator);
21
22 this.randomGenerator = _randomGenerator;
23 }
24
25 @Override
26 public boolean canHandle(final SelectionPolicy selectionPolicy) {
27 Objects.requireNonNull(selectionPolicy);
28
29 return selectionPolicy instanceof DoubleTournament;
30 }
31
32 @Override
33 public Selector<T> resolve(final AbstractEAExecutionContext<T> eaExecutionContext,
34 final AbstractEAConfiguration<T> eaConfiguration,
35 final SelectionPolicyHandlerResolver<T> selectionPolicyHandlerResolver,
36 final SelectionPolicy selectionPolicy) {
37 Objects.requireNonNull(selectionPolicy);
38 Validate.isInstanceOf(DoubleTournament.class, selectionPolicy);
39
40 return new DoubleTournamentSelector<>(selectionPolicy, randomGenerator);
41 }
42 }