7 files changed, 95 insertions, 40 deletions
diff --git a/src/jcgp/backend/modules/fitness/DigitalCircuit.java b/src/jcgp/backend/modules/fitness/DigitalCircuit.java
new file mode 100644
index 0000000..b01bdc5
--- /dev/null
+++ b/src/jcgp/backend/modules/fitness/DigitalCircuit.java
@@ -0,0 +1,17 @@
+package jcgp.backend.modules.fitness;
+
+import jcgp.backend.function.BitwiseLogic;
+
+public class DigitalCircuit extends TestCaseProblem<Integer> {
+
+	public DigitalCircuit() {
+		super();
+		functionSet = new BitwiseLogic();
+	}
+	
+	@Override
+	public String toString() {
+		return "Digital circuit";
+	}
+	
+}
diff --git a/src/jcgp/backend/modules/fitness/FitnessFunction.java b/src/jcgp/backend/modules/fitness/FitnessFunction.java
deleted file mode 100644
index d3b76cb..0000000
--- a/src/jcgp/backend/modules/fitness/FitnessFunction.java
+++ /dev/null
@@ -1,11 +0,0 @@
-package jcgp.backend.modules.fitness;
-
-import jcgp.backend.modules.Module;
-import jcgp.backend.population.Population;
-import jcgp.backend.resources.Resources;
-
-public interface FitnessFunction extends Module {
-
-	public void evaluate(Population population, Resources resources);
-	
-}
diff --git a/src/jcgp/backend/modules/fitness/Problem.java b/src/jcgp/backend/modules/fitness/Problem.java
new file mode 100644
index 0000000..1e70c13
--- /dev/null
+++ b/src/jcgp/backend/modules/fitness/Problem.java
@@ -0,0 +1,20 @@
+package jcgp.backend.modules.fitness;
+
+import jcgp.backend.function.FunctionSet;
+import jcgp.backend.modules.Module;
+import jcgp.backend.population.Chromosome;
+import jcgp.backend.population.Population;
+import jcgp.backend.resources.Resources;
+
+public abstract class Problem implements Module {
+
+	protected FunctionSet functionSet;
+	
+	public abstract void evaluate(Population population, Resources resources);
+	
+	public FunctionSet getFunctionSet() {
+		return functionSet;
+	}
+	
+	public abstract boolean isPerfectSolution(Chromosome fittest);
+}
diff --git a/src/jcgp/backend/modules/fitness/SymbolicRegression.java b/src/jcgp/backend/modules/fitness/SymbolicRegression.java
new file mode 100644
index 0000000..da2e69e
--- /dev/null
+++ b/src/jcgp/backend/modules/fitness/SymbolicRegression.java
@@ -0,0 +1,17 @@
+package jcgp.backend.modules.fitness;
+
+import jcgp.backend.function.IntegerArithmetic;
+
+public class SymbolicRegression extends TestCaseProblem<Integer> {	
+	
+	public SymbolicRegression() {
+		super();
+		functionSet = new IntegerArithmetic();
+	}
+	
+	@Override
+	public String toString() {
+		return "Symbolic regression";
+	}
+
+}
diff --git a/src/jcgp/backend/modules/fitness/testcase/TestCaseEvaluator.java b/src/jcgp/backend/modules/fitness/TestCaseProblem.java
index 4b0654c..7753e26 100644
--- a/src/jcgp/backend/modules/fitness/testcase/TestCaseEvaluator.java
+++ b/src/jcgp/backend/modules/fitness/TestCaseProblem.java
@@ -1,11 +1,13 @@
-package jcgp.backend.modules.fitness.testcase;
+package jcgp.backend.modules.fitness;
 
 import java.util.ArrayList;
-import java.util.Collections;
+import java.util.List;
 
-import jcgp.backend.modules.fitness.FitnessFunction;
+import jcgp.backend.population.Chromosome;
 import jcgp.backend.population.Population;
 import jcgp.backend.resources.Resources;
+import jcgp.backend.resources.parameters.IntegerParameter;
+import jcgp.backend.resources.parameters.Parameter;
 
 /**
  * 
@@ -17,7 +19,7 @@ import jcgp.backend.resources.Resources;
  * @author Eduardo Pedroni
  *
  */
-public abstract class TestCaseEvaluator implements FitnessFunction {
+public abstract class TestCaseProblem<U> extends Problem {
 	
 	public static class TestCase<T> {
 
@@ -46,7 +48,19 @@ public abstract class TestCaseEvaluator implements FitnessFunction {
 		}
 	}
 	
-	protected ArrayList<TestCase<?>> testCases;
+	private ArrayList<TestCase<U>> testCases;
+	private IntegerParameter maxFitness;
+	
+	public TestCaseProblem() {
+		maxFitness = new IntegerParameter(0, "Max fitness", true, false) {
+			@Override
+			public void validate(int newValue) {
+				// blank
+			}
+		};
+		testCases = new ArrayList<TestCase<U>>();
+	}
+	
 	
 	@Override
 	public void evaluate(Population population, Resources resources) {
@@ -69,19 +83,30 @@ public abstract class TestCaseEvaluator implements FitnessFunction {
 		}
 	}
 	
-	public int getMaxFitness() {
+	@Override
+	public Parameter[] getLocalParameters() {
+		return new Parameter[]{maxFitness};
+	}
+	
+	private int getMaxFitness() {
 		int fitness = 0;
 		
-		for (TestCase<?> tc : testCases) {
+		for (TestCase<U> tc : testCases) {
 			fitness += tc.getOutputs().length;
 		}
 		
 		return fitness;
 	}
 	
-	public void setTestCases(TestCase<?>... testCases) {
-		this.testCases = new ArrayList<TestCase<?>>();
-		Collections.addAll(this.testCases, testCases);
+	public void setTestCases(List<TestCase<U>> testCases) {
+		this.testCases.clear();
+		this.testCases.addAll(testCases);
+		maxFitness.set(getMaxFitness());
+	}
+	
+	@Override
+	public boolean isPerfectSolution(Chromosome fittest) {
+		return fittest.getFitness() >= maxFitness.get();
 	}
 }
 
diff --git a/src/jcgp/backend/resources/ModifiableResources.java b/src/jcgp/backend/resources/ModifiableResources.java
index 3e6b55e..90c2f03 100644
--- a/src/jcgp/backend/resources/ModifiableResources.java
+++ b/src/jcgp/backend/resources/ModifiableResources.java
@@ -1,5 +1,6 @@
 package jcgp.backend.resources;
 
+import jcgp.backend.function.FunctionSet;
 import jcgp.backend.resources.parameters.BooleanParameter;
 import jcgp.backend.resources.parameters.DoubleParameter;
 import jcgp.backend.resources.parameters.IntegerParameter;
@@ -30,8 +31,8 @@ public class ModifiableResources extends Resources {
 		}
 	}
 	
-	public void setFunctionSet(int index) {
-		functionSet = functionSets[index];
+	public void setFunctionSet(FunctionSet functionSet) {
+		this.functionSet = functionSet;
 		set("arity", functionSet.getMaxArity());
 	}
 	
diff --git a/src/jcgp/backend/resources/Resources.java b/src/jcgp/backend/resources/Resources.java
index c1c3e4c..d1f396a 100644
--- a/src/jcgp/backend/resources/Resources.java
+++ b/src/jcgp/backend/resources/Resources.java
@@ -5,11 +5,8 @@ import java.util.Random;
 
 import javafx.beans.value.ChangeListener;
 import javafx.beans.value.ObservableValue;
-import jcgp.backend.function.BitwiseLogic;
-import jcgp.backend.function.BooleanLogic;
 import jcgp.backend.function.Function;
 import jcgp.backend.function.FunctionSet;
-import jcgp.backend.function.IntegerArithmetic;
 import jcgp.backend.resources.parameters.BooleanParameter;
 import jcgp.backend.resources.parameters.DoubleParameter;
 import jcgp.backend.resources.parameters.IntegerParameter;
@@ -30,12 +27,7 @@ public class Resources {
 
 	protected Random numberGenerator = new Random();
 		
-	// function sets
-	protected FunctionSet[] functionSets =  new FunctionSet[] {
-			new IntegerArithmetic(),
-			new BitwiseLogic(),
-			new BooleanLogic() };
-	protected FunctionSet functionSet = functionSets[0];
+	protected FunctionSet functionSet;
 	
 	// GUI console
 	protected Console console;
@@ -202,7 +194,8 @@ public class Resources {
 			}
 		});
 
-		parameters.put("arity", new IntegerParameter(functionSet.getMaxArity(), "Max arity", true, false) {
+		//parameters.put("arity", new IntegerParameter(functionSet.getMaxArity(), "Max arity", true, false) {
+		parameters.put("arity", new IntegerParameter(0, "Max arity", true, false) {
 			@Override
 			public void validate(int newValue) {
 				// blank
@@ -267,13 +260,6 @@ public class Resources {
 	}
 	
 	/**
-	 * @return the functionSets
-	 */
-	public FunctionSet[] getFunctionSets() {
-		return functionSets;
-	}
-
-	/**
 	 * @return the functionSet
 	 */
 	public FunctionSet getFunctionSet() {