Casting a Spring's Proxy object to the actual runtime class

Question

I\'m using Spring, at one point I would like to cast the object to its actual runtime implementation.

Example:

Class MyClass extends NotMyClass {
            


        

Answer 1

Now you can use

AopTestUtils.getTargetObject(proxy)

.

The implementation is the same of @siulkilulki sugestion, but it's on Spring helper

Answer 2

Basically when you use AOP in Spring, Spring build a Proxy for you. You have two option:

1. when you apply an aspect on a bean that implements an interface, in this case Spring use JdkDynamicProxy
2. when your spring bean don't implements any interface and if you have cglib 2.2 in you classpath, consider that from spring 3.2.x you have cglib in the spring container by default, spring use a special proxy called CGLibProxy.

The key point here is that when an aspect is applied on your bean Spring will instance a proxy and if you try to perform a cast you will get an exception.

I hope tha this can help you

Answer 3

For me version from EDIT 2 didn't worked. Below one worked:

@SuppressWarnings({"unchecked"})
protected <T> T getTargetObject(Object proxy) throws Exception {
    while( (AopUtils.isJdkDynamicProxy(proxy))) {
        return (T) getTargetObject(((Advised)proxy).getTargetSource().getTarget());
    }
    return (T) proxy; // expected to be cglib proxy then, which is simply a specialized class
}

Usage:

    UserServicesImpl serviceImpl = getTargetObject(serviceProxy);
    serviceImpl.setUserDao(userDAO);