1 package net.bmahe.genetics4j.moo.nsga2.impl;
2
3 import java.util.Objects;
4
5 import org.apache.commons.lang3.Validate;
6
7 import net.bmahe.genetics4j.core.selection.SelectionPolicyHandler;
8 import net.bmahe.genetics4j.core.selection.SelectionPolicyHandlerResolver;
9 import net.bmahe.genetics4j.core.selection.Selector;
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.moo.nsga2.spec.NSGA2Selection;
14
15 public class NSGA2SelectionPolicyHandler<T extends Comparable<T>> implements SelectionPolicyHandler<T> {
16
17 @Override
18 public boolean canHandle(final SelectionPolicy selectionPolicy) {
19 Objects.requireNonNull(selectionPolicy);
20 return selectionPolicy instanceof NSGA2Selection<?>;
21 }
22
23 @Override
24 public Selector<T> resolve(final AbstractEAExecutionContext<T> eaExecutionContext,
25 final AbstractEAConfiguration<T> eaConfiguration,
26 final SelectionPolicyHandlerResolver<T> selectionPolicyHandlerResolver,
27 final SelectionPolicy selectionPolicy) {
28 Objects.requireNonNull(eaExecutionContext);
29 Objects.requireNonNull(eaConfiguration);
30 Objects.requireNonNull(selectionPolicyHandlerResolver);
31 Objects.requireNonNull(selectionPolicy);
32 Validate.isInstanceOf(NSGA2Selection.class, selectionPolicy);
33
34 final NSGA2Selection<T> nsga2Spec = (NSGA2Selection<T>) selectionPolicy;
35
36 return new NSGA2Selector<>(nsga2Spec);
37 }
38 }