diff -r 000000000000 -r 9a7df12648b9 javaquery/demo-twitter/src/main/java/org/apidesign/bck2brwsr/demo/twitter/TwitterClient.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/javaquery/demo-twitter/src/main/java/org/apidesign/bck2brwsr/demo/twitter/TwitterClient.java	Thu Apr 04 13:12:17 2013 +0200
@@ -0,0 +1,137 @@
+/**
+ * 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.demo.twitter;
+
+import java.util.Arrays;
+import java.util.List;
+import org.apidesign.bck2brwsr.htmlpage.api.*;
+import org.apidesign.bck2brwsr.htmlpage.api.Page;
+import org.apidesign.bck2brwsr.htmlpage.api.Property;
+import org.apidesign.bck2brwsr.htmlpage.api.ComputedProperty;
+
+/** Controller class for access to Twitter.
+ * 
+ * @author Jaroslav Tulach
+ */
+@Page(xhtml="index.html", className="TwitterModel", properties={
+    @Property(name="savedLists", type=TwitterClient.Twttrs.class, array = true),
+    @Property(name="activeTweetersName", type=String.class),
+    @Property(name="modifiedList", type=TwitterClient.Twttrs.class),
+    @Property(name="userNameToAdd", type=String.class),
+    @Property(name="currentTweets", type=String.class, array = true)
+})
+public class TwitterClient {
+    @Model(className = "Tweeters", properties = {
+        @Property(name="name", type = String.class),
+        @Property(name="userNames", type = String.class, array = true)
+    })
+    static class Twttrs {
+    }
+    
+    private static Tweeters tweeters(String listName, String... userNames) {
+        Tweeters t = new Tweeters();
+        t.setName(listName);
+        t.getUserNames().addAll(Arrays.asList(userNames));
+        return t;
+    }
+    
+    static {
+        final TwitterModel model = new TwitterModel();
+        final List<Tweeters> svdLst = model.getSavedLists();
+        svdLst.add(tweeters("API Design", "JaroslavTulach"));
+        svdLst.add(tweeters("Celebrities", "JohnCleese", "MCHammer", "StephenFry", "algore", "StevenSanderson"));
+        svdLst.add(tweeters("Microsoft people", "BillGates", "shanselman", "ScottGu"));
+        svdLst.add(tweeters("NetBeans", "GeertjanW","monacotoni", "NetBeans"));
+        svdLst.add(tweeters("Tech pundits", "Scobleizer", "LeoLaporte", "techcrunch", "BoingBoing", "timoreilly", "codinghorror"));
+
+        model.setActiveTweetersName("NetBeans");
+        
+        model.applyBindings();
+    }
+    
+    @ComputedProperty
+    static Tweeters activeTweeters(String activeTweetersName, List<Tweeters> savedLists, Tweeters modifiedList) {
+        if (modifiedList != null && modifiedList.getName() != null) {
+            if (modifiedList.getName().equals(activeTweetersName)) {
+                return modifiedList;
+            } else {
+                modifiedList.setName(null);
+            }
+        }
+        return findByName(savedLists, activeTweetersName);
+    }
+    
+    @ComputedProperty
+    static boolean hasUnsavedChanges(Tweeters modifiedList) {
+        return modifiedList != null;
+    }
+    
+    @ComputedProperty
+    static boolean userNameToAddIsValid(String userNameToAdd, String activeTweetersName, List<Tweeters> savedLists, Tweeters modifiedList) {
+        Tweeters editingList = activeTweeters(activeTweetersName, savedLists, modifiedList);
+        return editingList != null && userNameToAdd != null && 
+            userNameToAdd.matches("[a-zA-Z0-9_]{1,15}") &&
+            !editingList.getUserNames().contains(userNameToAdd);
+    }
+    
+    @OnFunction
+    static void deleteList(TwitterModel model) {
+        final List<Tweeters> sl = model.getSavedLists();
+        sl.remove(model.getActiveTweeters());
+        if (sl.isEmpty()) {
+            final Tweeters t = new Tweeters();
+            t.setName("New");
+            sl.add(t);
+        }
+        model.setActiveTweetersName(sl.get(0).getName());
+    }
+    
+    @OnFunction
+    static void saveChanges(TwitterModel model) {
+        Tweeters t = findByName(model.getSavedLists(), model.getActiveTweetersName());
+        int indx = model.getSavedLists().indexOf(t);
+        assert indx != -1;
+        model.getSavedLists().set(indx, model.getModifiedList());
+        model.setModifiedList(null);
+    }
+    
+    @OnFunction
+    static void addUser(TwitterModel model) {
+        String n = model.getUserNameToAdd();
+        findModifiedList(model).getUserNames().add(n);
+    }
+    @OnFunction
+    static void removeUser(String data, TwitterModel model) {
+        findModifiedList(model).getUserNames().remove(data);
+    }
+    
+    private static Tweeters findModifiedList(TwitterModel model) {
+        if (model.getModifiedList() == null || model.getModifiedList().getName() == null) {
+            model.setModifiedList(model.getActiveTweeters().clone());
+        }
+        return model.getModifiedList();
+    }
+    private static Tweeters findByName(List<Tweeters> list, String name) {
+        for (Tweeters l : list) {
+            if (l.getName() != null && l.getName().equals(name)) {
+                return l;
+            }
+        }
+        return list.isEmpty() ? null : list.get(0);
+    }
+}