diff -r 000000000000 -r 9ddce13e8ff9 javaquery/api/src/main/java/org/apidesign/bck2brwsr/htmlpage/KOFunction.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/javaquery/api/src/main/java/org/apidesign/bck2brwsr/htmlpage/KOFunction.java	Mon Apr 15 18:30:30 2013 +0200
@@ -0,0 +1,46 @@
+/**
+ * Back 2 Browser Bytecode Translator
+ * Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. Look for COPYING file in the top folder.
+ * If not, see http://opensource.org/licenses/GPL-2.0.
+ */
+package org.apidesign.bck2brwsr.htmlpage;
+
+import java.lang.reflect.Method;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+/** Represents callback from Knockout.js to Java.
+ *
+ * @author Jaroslav Tulach <jtulach@netbeans.org>
+ */
+public final class KOFunction {
+    private static final Logger LOG = Logger.getLogger(KOFunction.class.getName());
+    private final Object model;
+    private final Method method;
+    
+    KOFunction(Object model, String method) throws NoSuchMethodException {
+        this.method = model.getClass().getDeclaredMethod(method, Object.class, Object.class);
+        this.method.setAccessible(true);
+        this.model = model;
+    }
+    
+    public void call(Object data, Object ev) {
+        try {
+            this.method.invoke(model, data, ev);
+        } catch (Throwable ex) {
+            LOG.log(Level.SEVERE, "Can't call " + method + " on " + model, ex);
+        }
+    }
+}