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()));
+				}
+			}
+		}
+	}
+}