Quick way to automatically fix an object to a particular interface in Java.

gistfile1.txt

import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;

public class InterfaceFixer {
	@SuppressWarnings("unchecked")
	public static <T> T fixToInterface(T object, Class<T> clazz) {
	     return (T) Proxy.newProxyInstance(
	    		 clazz.getClassLoader(),
                 new Class[] { clazz },
                 new FixedInvocationHandler(object));
	}
	
	private static class FixedInvocationHandler implements InvocationHandler {
		Object obj;
		
		public FixedInvocationHandler(Object obj) {
			this.obj = obj;
		}

		@Override
		public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
			return method.invoke(obj, args);
		}
	}
}

Is there an existing library that does something like this that you can combine to Cloneable to easily create (non reflection safe) read-only copies of your objects by splitting it into a read and write interface?

interface List<T> { T get(int index); } // read-only interface
interface MutableList<T> extends List<T> { void append(T item); } // writeable interface

MutableList<T> list = new ArrayList<Integer>();
list.add(10); list.add(20); list.add(30);
List<T> frozenList = fixToInterface(list.clone(), IList.class);

((MutableList<Integer>) frozenList).add(10); // Throws class cast exception