From 1fd678821cf133c7c431daea687f3467bb0be2dd Mon Sep 17 00:00:00 2001
From: Eduardo Pedroni <ep625@york.ac.uk>
Date: Tue, 4 Feb 2014 16:20:33 +0000
Subject: Added fitness evaluation mechanism, though it might not be a very
good design. Tests will be done to verify that.
---
src/jcgp/fitness/FitnessEvaluator.java | 17 ----------
src/jcgp/fitness/FitnessFunction.java | 4 +--
src/jcgp/fitness/ParameterMismatchException.java | 10 ++++++
src/jcgp/fitness/TestCase.java | 41 ++++++++++++++++++++++++
src/jcgp/fitness/TestFitFunction.java | 17 ----------
src/jcgp/fitness/TruthTableEvaluator.java | 26 +++++++++++++++
6 files changed, 79 insertions(+), 36 deletions(-)
delete mode 100644 src/jcgp/fitness/FitnessEvaluator.java
create mode 100644 src/jcgp/fitness/ParameterMismatchException.java
create mode 100644 src/jcgp/fitness/TestCase.java
delete mode 100644 src/jcgp/fitness/TestFitFunction.java
create mode 100644 src/jcgp/fitness/TruthTableEvaluator.java
(limited to 'src/jcgp/fitness')
diff --git a/src/jcgp/fitness/FitnessEvaluator.java b/src/jcgp/fitness/FitnessEvaluator.java
deleted file mode 100644
index 5ecf679..0000000
--- a/src/jcgp/fitness/FitnessEvaluator.java
+++ /dev/null
@@ -1,17 +0,0 @@
-package jcgp.fitness;
-
-import jcgp.population.Population;
-
-public class FitnessEvaluator {
-
- private FitnessFunction fitnessFunction;
-
- public FitnessEvaluator(FitnessFunction fitnessFunction) {
- this.fitnessFunction = fitnessFunction;
- }
-
- public void evaluateFitness(Population population) {
-
- }
-
-}
diff --git a/src/jcgp/fitness/FitnessFunction.java b/src/jcgp/fitness/FitnessFunction.java
index 2155542..6fa63ef 100644
--- a/src/jcgp/fitness/FitnessFunction.java
+++ b/src/jcgp/fitness/FitnessFunction.java
@@ -3,7 +3,7 @@ package jcgp.fitness;
import jcgp.population.Population;
public interface FitnessFunction {
-
- public void evaluatePopulation(Population population);
+
+ public void evaluate(Population population);
}
diff --git a/src/jcgp/fitness/ParameterMismatchException.java b/src/jcgp/fitness/ParameterMismatchException.java
new file mode 100644
index 0000000..0ca69a7
--- /dev/null
+++ b/src/jcgp/fitness/ParameterMismatchException.java
@@ -0,0 +1,10 @@
+package jcgp.fitness;
+
+public class ParameterMismatchException extends RuntimeException {
+
+ /**
+ *
+ */
+ private static final long serialVersionUID = -3161318886125868134L;
+
+}
diff --git a/src/jcgp/fitness/TestCase.java b/src/jcgp/fitness/TestCase.java
new file mode 100644
index 0000000..e2bd5ed
--- /dev/null
+++ b/src/jcgp/fitness/TestCase.java
@@ -0,0 +1,41 @@
+package jcgp.fitness;
+
+import jcgp.CGP.Parameters;
+
+public class TestCase {
+
+ private int[] inputs;
+ private int[] outputs;
+
+ public TestCase(int[] inputs, int[] outputs) throws ParameterMismatchException {
+ if (inputs.length == Parameters.getInputs()) {
+ this.inputs = inputs;
+ } else {
+ throw new ParameterMismatchException();
+ }
+
+ if (outputs.length == Parameters.getOutputs()) {
+ this.outputs = outputs;
+ } else {
+ throw new ParameterMismatchException();
+ }
+
+ }
+
+ public int getInput(int index) {
+ return inputs[index];
+ }
+
+ public int getOutput(int index) {
+ return outputs[index];
+ }
+
+ public int[] getInputs() {
+ return inputs;
+ }
+
+ public int[] getOutputs() {
+ return outputs;
+ }
+
+}
diff --git a/src/jcgp/fitness/TestFitFunction.java b/src/jcgp/fitness/TestFitFunction.java
deleted file mode 100644
index 00ee833..0000000
--- a/src/jcgp/fitness/TestFitFunction.java
+++ /dev/null
@@ -1,17 +0,0 @@
-package jcgp.fitness;
-
-import jcgp.population.Chromosome;
-import jcgp.population.Population;
-
-public class TestFitFunction implements FitnessFunction {
-
- @Override
- public void evaluatePopulation(Population population) {
-
- for (Chromosome c : population) {
- int i = c.getOutput(0).calculate();
- System.out.println(i);
- c.setFitness(1);
- }
- }
-}
diff --git a/src/jcgp/fitness/TruthTableEvaluator.java b/src/jcgp/fitness/TruthTableEvaluator.java
new file mode 100644
index 0000000..64ca209
--- /dev/null
+++ b/src/jcgp/fitness/TruthTableEvaluator.java
@@ -0,0 +1,26 @@
+package jcgp.fitness;
+
+import jcgp.CGP.Parameters;
+import jcgp.CGP.TruthTable;
+import jcgp.population.Chromosome;
+import jcgp.population.Population;
+
+public class TruthTableEvaluator implements FitnessFunction {
+
+ @Override
+ public void evaluate(Population population) {
+ for (Chromosome chromosome : population) {
+ for (int t = 0; t < TruthTable.getTestCaseCount(); t++) {
+ chromosome.setInputs(TruthTable.getTestCase(t).getInputs());
+ int fitness = 0;
+ for (int o = 0; o < Parameters.getOutputs(); o++) {
+ if (chromosome.getOutput(o).calculate() == TruthTable.getTestCase(t).getOutput(o)) {
+ fitness++;
+ }
+ }
+ chromosome.setFitness(fitness);
+ }
+ }
+ }
+
+}
--
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