1 files changed, 73 insertions, 0 deletions
diff --git a/src/jcgp/backend/modules/mutator/PercentPointMutator.java b/src/jcgp/backend/modules/mutator/PercentPointMutator.java
new file mode 100644
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--- /dev/null
+++ b/src/jcgp/backend/modules/mutator/PercentPointMutator.java
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+package jcgp.backend.modules.mutator;
+
+import jcgp.backend.resources.Resources;
+import jcgp.backend.resources.parameters.BooleanParameter;
+import jcgp.backend.resources.parameters.DoubleParameter;
+import jcgp.backend.resources.parameters.IntegerParameter;
+import jcgp.backend.resources.parameters.Parameter;
+import jcgp.backend.resources.parameters.ParameterStatus;
+
+/**
+ * Percent point mutator
+ * <br><br>
+ * This operator calculates how many genes to mutate based on the mutation rate
+ * parameter. The total number of genes is computed from the number of nodes, 
+ * the arity and the number of outputs. It then uses the point mutation 
+ * algorithm to perform the required number of mutations.
+ * 
+ * 
+ * @see PointMutator
+ * @author Eduardo Pedroni
+ *
+ */
+public class PercentPointMutator extends PointMutator {
+	
+	private DoubleParameter mutationRate;
+	private IntegerParameter genesMutated;
+	private BooleanParameter report;
+
+	/**
+	 * Creates a new instance of PointMutator. 
+	 * 
+	 * @param resources a reference to the experiment's resources.
+	 */
+	public PercentPointMutator(final Resources resources) {
+		mutationRate = new DoubleParameter(10, "Percent mutation", false, false) {
+			@Override
+			public void validate(Number newValue) {
+				genesMutated.set((int) ((newValue.intValue()) * (((((double) resources.nodes() + resources.outputs()))) / 100)));
+				if (newValue.doubleValue() <= 0 || newValue.doubleValue() > 100) {
+					status = ParameterStatus.INVALID;
+					status.setDetails("Mutation rate must be > 0 and <= 100");
+				} else if (genesMutated.get() <=  0) {
+					status = ParameterStatus.WARNING;
+					status.setDetails("With mutation rate " + mutationRate.get() + ", 0 genes will be mutated.");
+				} else {
+					status = ParameterStatus.VALID;
+				}
+			}
+		};
+		genesMutated = new IntegerParameter(0, "Genes mutated", true, false) {
+			@Override
+			public void validate(Number newValue) {
+				// blank
+			}
+		};
+		report = new BooleanParameter(false, "Report") {
+			@Override
+			public void validate(Boolean newValue) {
+				// blank
+			}
+		};
+	}
+
+	@Override
+	public Parameter<?>[] getLocalParameters() {
+		return new Parameter[] {mutationRate, genesMutated, report};
+	}
+
+	@Override
+	public String toString() {
+		return "Percent point mutation";
+	}
+}