1 package net.bmahe.genetics4j.core.selection;
2
3 import java.util.Objects;
4 import java.util.random.RandomGenerator;
5
6 import org.apache.commons.lang3.Validate;
7 import org.apache.logging.log4j.LogManager;
8 import org.apache.logging.log4j.Logger;
9
10 import net.bmahe.genetics4j.core.spec.AbstractEAConfiguration;
11 import net.bmahe.genetics4j.core.spec.AbstractEAExecutionContext;
12 import net.bmahe.genetics4j.core.spec.selection.SelectionPolicy;
13 import net.bmahe.genetics4j.core.spec.selection.Tournament;
14
15 public class TournamentSelectionPolicyHandler<T extends Comparable<T>> implements SelectionPolicyHandler<T> {
16 public static final Logger logger = LogManager.getLogger(TournamentSelectionPolicyHandler.class);
17
18 private final RandomGenerator randomGenerator;
19
20 public TournamentSelectionPolicyHandler(final RandomGenerator _randomGenerator) {
21 Objects.requireNonNull(_randomGenerator);
22
23 this.randomGenerator = _randomGenerator;
24 }
25
26 @Override
27 public boolean canHandle(final SelectionPolicy selectionPolicy) {
28 Objects.requireNonNull(selectionPolicy);
29
30 return selectionPolicy instanceof Tournament;
31 }
32
33 @Override
34 public Selector<T> resolve(final AbstractEAExecutionContext<T> eaExecutionContext,
35 final AbstractEAConfiguration<T> eaConfiguration,
36 final SelectionPolicyHandlerResolver<T> selectionPolicyHandlerResolver,
37 final SelectionPolicy selectionPolicy) {
38 Objects.requireNonNull(selectionPolicy);
39 Validate.isInstanceOf(Tournament.class, selectionPolicy);
40
41 return new TournamentSelector<>(selectionPolicy, randomGenerator);
42 }
43 }