Add: CommandRouter to route Request to matching CommandHandler

src/main/java/ch/unibas/dmi/dbis/cs108/casono/server/network/command/CommandRouter.java

@@ -0,0 +1,24 @@
+package ch.unibas.dmi.dbis.cs108.casono.server.network.command;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import ch.unibas.dmi.dbis.cs108.casono.server.network.parser.Request;
+
+public class CommandRouter {
+    private final Map<Class<? extends Request>, CommandHandler> handlers = new HashMap<>();
+
+    public void register(Class<? extends Request> request, CommandHandler handler) {
+        handlers.put(request, handler);
+    }
+
+    public void execute(Request request) {
+        CommandHandler handler = handlers.get(request.getClass());
+
+        if (handler == null) {
+            String requestName = request.getClass().toString();
+            throw new UnknownRequestException("Unable to execute request " + requestName + ". Type unknown", requestName);
+        }
+        handler.execute(request);
+    }
+}