1 package net.bmahe.genetics4j.core.spec.combination;
2
3 import org.apache.commons.lang3.Validate;
4 import org.immutables.value.Value;
5
6 @Value.Immutable
7 public abstract class MultiPointArithmetic implements CombinationPolicy {
8
9 public static final double DEFAULT_ALPHA = 0.5d;
10
11 @Value.Parameter
12 public abstract int numCrossovers();
13
14 @Value.Parameter
15 @Value.Default
16 public double alpha() {
17 return DEFAULT_ALPHA;
18 }
19
20 public static MultiPointArithmetic of(final int numCrossovers, final double alpha) {
21 Validate.isTrue(numCrossovers > 0);
22 return ImmutableMultiPointArithmetic.of(numCrossovers, alpha);
23 }
24
25 public static MultiPointArithmetic of(final int numCrossovers) {
26 return of(numCrossovers, DEFAULT_ALPHA);
27 }
28 }