diff --git a/src/dev/peerat/framework/ResponseMapper.java b/src/dev/peerat/framework/ResponseMapper.java
new file mode 100644
index 0000000..93165ba
--- /dev/null
+++ b/src/dev/peerat/framework/ResponseMapper.java
@@ -0,0 +1,7 @@
+package dev.peerat.framework;
+
+public interface ResponseMapper{
+
+	void map(Context context, HttpReader reader, HttpWriter writer, Object result) throws Exception;
+	
+}
diff --git a/src/dev/peerat/framework/RouteMapper.java b/src/dev/peerat/framework/RouteMapper.java
index cfff5af..336cc23 100644
--- a/src/dev/peerat/framework/RouteMapper.java
+++ b/src/dev/peerat/framework/RouteMapper.java
@@ -97,7 +97,7 @@ public class RouteMapper<U extends User>{
 			Object[] inv = target.getBinder().bindMethod(target.getMethod(), matcher, context, reader, writer, params);
 			Object result = target.getMethod().invoke(target.getInstance(), inv);
 			if(result == null) return true;
-			//TODO MAP OBJECT TO RESPONSE
+			router.getMapper().map(context, reader, writer, result);
 			return true;
 		}
 		return false;
diff --git a/src/dev/peerat/framework/Router.java b/src/dev/peerat/framework/Router.java
index d967ce0..f16fc31 100644
--- a/src/dev/peerat/framework/Router.java
+++ b/src/dev/peerat/framework/Router.java
@@ -24,6 +24,7 @@ public class Router<U extends User>{
 	private Response noFileFound;
 	private Authenticator<U> auth;
 	private String[][] headers;
+	private ResponseMapper responseMapper;
 	private ServerSocket serverSocket;
 
 	public Router(){
@@ -50,6 +51,11 @@ public class Router<U extends User>{
 		return this;
 	}
 	
+	public Router<U> setMapper(ResponseMapper mapper){
+		this.responseMapper = mapper;
+		return this;
+	}
+	
 	public Router<U> register(Response response){
 		try{
 			Method method = response.getClass().getDeclaredMethod("exec",
@@ -158,6 +164,10 @@ public class Router<U extends User>{
 		return  this.headers[type.ordinal()];
 	}
 	
+	public ResponseMapper getMapper(){
+		return this.responseMapper;
+	}
+	
 	public Authenticator<U> getAuthenticator(){
 		return this.auth;
 	}
@@ -193,8 +203,13 @@ public class Router<U extends User>{
 		return this.exceptions;
 	}
 	
-	public void listen(int port, boolean ssl) throws Exception{
+	private void checkStart(){
 		bindAll();
+		if(this.responseMapper == null) this.responseMapper = (c,r,w,o) -> {};
+	}
+	
+	public void listen(int port, boolean ssl) throws Exception{
+		checkStart();
 		if (ssl) { // Not needed with the use of a proxy
 			try {
 				SSLServerSocketFactory ssf = (SSLServerSocketFactory) SSLServerSocketFactory.getDefault();