Create a proxy of proxy

[glammy]

I'm using the following code to create a proxy:

public Object createProxiedInstance(Object originalInstance) throws Exception {
    Class<?> originalClass = instance.getClass();
    ProxyFactory factory = new ProxyFactory();

    factory.setSuperclass(originalClass);

    factory.setHandler(new MethodHandler() {..});
    Class<T> proxyClass = factory.createClass();

    return proxyClass.newInstance();
}

It works fine if a pass a normal object. However, if I pass an object that is already a proxy (created by the same method, but with a different method handler), I get:

javassist.bytecode.DuplicateMemberException: duplicate method: setHandler  in com.mypackage.Bean_$$_javassist_0_$$_javassist_1

I could work this around by combining the method handler of the original proy and the one of the new proxy, but is there a way to make proxies of proxies, as if the proxies were normal objects? (using javassist 3.8.0 GA)

[glammy]

The problem was (actually, it's the same with  CGLIB - I tried it using commons-proxy) that I should not try to create a  proxy class of the proxy class. The second proxy should again be of the  original class. So adding the following line resolves the problem:

if (instance instanceof ProxyObject) {
    originalClass = originalClass.getSuperclass();
}