PojoProxy.java

public class PojoProxy implements InvocationHandler {
    private Map<String, Object> map;
    private Map<String, List<Observer>> observers = new HashMap<String, List<Observer>>();

    public static Object newInstance(Class[] interfaces, Context context) {
        return Proxy.newProxyInstance(context.getClassLoader(),
                interfaces,
                new PojoProxy(new HashMap()));
    }

    public PojoProxy(Map map) {
        this.map = map;
    }

    public Object invoke(Object proxy, Method m, Object[] args) throws
            Throwable {
        String methodName = m.getName();
        if (methodName.startsWith("get")) {
            String name = methodName.substring(methodName.indexOf("get") + 3).toLowerCase();
            return map.get(name);
        } else if (methodName.startsWith("set")) {
            String name = methodName.substring(methodName.indexOf("set") + 3).toLowerCase();
            map.put(name, args[0]);
            notifyObservers(name, args[0]);
            return null;
        } else if (methodName.startsWith("is")) {
            String name = methodName.substring(methodName.indexOf("is") + 2).toLowerCase();
            return (map.get(name));
        } else if (methodName.equals("addObserver")) {
            addObserver((String) args[0], (Observer) args[1]);
        }
        return null;
    }

    private void addObserver(String field, Observer observer) {
        List<Observer> list = observers.get(field.toLowerCase());
        if (list == null) {
            list = new LinkedList<Observer>();
            observers.put(field.toLowerCase(), list);
        }
        list.add(observer);
    }

    private void notifyObservers(String field, final Object value) {
        synchronized (observers) {
            final List<Observer> list = observers.get(field.toLowerCase());
            if (list == null) {
                return;
            }
            for (final Observer observer : list) {
                if (Config.SIMULATION_MODE == Simulation.ON_UI_THREAD) {
                    observer.update(value);
                } else {
                    UIHandler.instance.post(new Runnable() {
                        @Override
                        public void run() {
                            observer.update(value);
                        }
                    });
                }
            }
        }
    }
}