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-rw-r--r--src/jcgp/modules/mutator/Mutator.java9
-rw-r--r--src/jcgp/modules/mutator/StandardMutator.java31
2 files changed, 40 insertions, 0 deletions
diff --git a/src/jcgp/modules/mutator/Mutator.java b/src/jcgp/modules/mutator/Mutator.java
new file mode 100644
index 0000000..10df8cd
--- /dev/null
+++ b/src/jcgp/modules/mutator/Mutator.java
@@ -0,0 +1,9 @@
+package jcgp.modules.mutator;
+
+import jcgp.population.Chromosome;
+
+public interface Mutator {
+
+ void mutate(Chromosome chromosome);
+
+}
diff --git a/src/jcgp/modules/mutator/StandardMutator.java b/src/jcgp/modules/mutator/StandardMutator.java
new file mode 100644
index 0000000..17bd0be
--- /dev/null
+++ b/src/jcgp/modules/mutator/StandardMutator.java
@@ -0,0 +1,31 @@
+package jcgp.modules.mutator;
+
+import jcgp.Utilities;
+import jcgp.parameters.Parameters;
+import jcgp.population.Chromosome;
+import jcgp.population.MutableElement;
+import jcgp.population.Node;
+import jcgp.population.Output;
+
+public class StandardMutator implements Mutator {
+
+ @Override
+ public void mutate(Chromosome chromosome) {
+ int mutations = (int) (Parameters.getMutationRate() * (((double) Parameters.getNodeCount() + Parameters.getOutputs()) / 100));
+
+ for (int i = 0; i < mutations; i++) {
+ MutableElement m = chromosome.getRandomMutableElement();
+
+ if (m instanceof Output) {
+ m.setConnection(chromosome.getRandomConnection());
+ } else if (m instanceof Node) {
+ int geneType = Utilities.getRandomInt(1 + Parameters.getMaxArity());
+ if (geneType < 1) {
+ ((Node) m).setFunction(Utilities.getRandomFunction());
+ } else {
+ m.setConnection(chromosome.getRandomConnection(((Node) m).getColumn()));
+ }
+ }
+ }
+ }
+}