4 files changed, 23 insertions, 3 deletions
diff --git a/src/jcgp/backend/population/Gene.java b/src/jcgp/backend/population/Gene.java
new file mode 100644
index 0000000..47c8dfd
--- /dev/null
+++ b/src/jcgp/backend/population/Gene.java
@@ -0,0 +1,20 @@
+package jcgp.backend.population;
+
+/**
+ * TODO comment
+ * 
+ * @author Eduardo Pedroni
+ *
+ */
+public abstract class Gene {
+
+	private Object guiObject;
+	
+	public void setGUIObject(Object guiObject) {
+		this.guiObject = guiObject;
+	}
+	
+	public Object getGUIObject() {
+		return guiObject;
+	}
+}
diff --git a/src/jcgp/backend/population/Input.java b/src/jcgp/backend/population/Input.java
index 97fe82b..7d2590b 100644
--- a/src/jcgp/backend/population/Input.java
+++ b/src/jcgp/backend/population/Input.java
@@ -9,7 +9,7 @@ package jcgp.backend.population;
  * @author Eduardo Pedroni
  *
  */
-public class Input implements Connection {
+public class Input extends Gene implements Connection {
 	
 	private Object value;
 	private int index;
diff --git a/src/jcgp/backend/population/Node.java b/src/jcgp/backend/population/Node.java
index 6696694..a9131d1 100644
--- a/src/jcgp/backend/population/Node.java
+++ b/src/jcgp/backend/population/Node.java
@@ -25,7 +25,7 @@ import jcgp.backend.resources.Resources;
  * @author Eduardo Pedroni
  *
  */
-public class Node implements Mutable, Connection {
+public class Node extends Gene implements Mutable, Connection {
 
 	private Function function;
 	private Connection[] connections;
diff --git a/src/jcgp/backend/population/Output.java b/src/jcgp/backend/population/Output.java
index a346d4a..c87f97c 100644
--- a/src/jcgp/backend/population/Output.java
+++ b/src/jcgp/backend/population/Output.java
@@ -16,7 +16,7 @@ import java.util.ArrayList;
  * @author Eduardo Pedroni
  *
  */
-public class Output implements Mutable {
+public class Output extends Gene implements Mutable {
 	
 	private Connection source;
 	private Chromosome chromosome;